NELLCOR PURITAN BENNETT LLC Patent applications |
Patent application number | Title | Published |
20140190479 | SPEAKING VALVE WITH SATURATION INDICATION - A speaking valve includes a hollow body configured to be secured to a connector of a tracheostomy system disposed in a patient. The speaking valve further includes a cap that houses a valve member, which enables the speaking valve to act as a one-way check valve. The valve member, hollow body, or other components of the valve may include a material that undergoes a chemical changed when exposed to moisture, i.e., a hydrosensitive material. Particularly, the hydrosensitive material may exhibit a color change when exposed to moisture. As such, the hydrosensitive material may be useful in providing a visual indication of the saturation and/or moisture level of the speaking valve. | 07-10-2014 |
20140085080 | SYSTEM, METHOD, AND SOFTWARE FOR AUTOMATING PHYSIOLOGIC DISPLAYS AND ALERTS WITH TRENDING HEURISTICS - A method for automating physiologic alerts and derived parameters with trending heuristics includes receiving at a mobile patient monitor interface, a first input expression indicative of a first parameter source for first patient parameters from a first medical device from a user. The method further includes receiving, at the mobile patient monitor interface, a second input expression indicative of a second parameter source for second patient parameters from a second medical device from a user. The method further includes applying, at the mobile patient monitor interface, a smoothing operator to the first input expression and the second input expression. The method further includes evaluating, at the mobile patient monitor interface, a complex expression of the first patient parameters and the second patient parameters based on the smoothing operator to initiate display of at least one parameter, derived parameter, trend, or alert on a remote device. | 03-27-2014 |
20140085079 | SYSTEM, METHOD, AND SOFTWARE FOR AUTOMATING PHYSIOLOGIC ALERTS AND DERIVED CALCULATIONS WITH MANUAL VALUES - A method for automating physiologic alerts with manual values includes receiving at a mobile patient monitor interface, a first input expression indicative of a first parameter source for first patient parameters from a first medical device or input from a user. The method further includes receiving, at the mobile patient monitor interface, a second input expression indicative of a second parameter source for second patient parameters from a second medical device or input from a user. The method further includes evaluating, at the mobile patient monitor interface, a manual input value in the first input expression or the second input expression. The method further includes evaluating, at the mobile patient monitor interface, a complex expression of the first patient parameters and the second patient parameters based on the manual input value to initiate display of at least one alert or derived parameter on a remote device. | 03-27-2014 |
20140085078 | SYSTEM, METHOD, AND SOFTWARE FOR AUTOMATING PHYSIOLOGIC DISPLAYS AND ALERTS WITH PRECEDENCE ORDER - A method for automating physiologic alerts with precedence order includes receiving at a mobile patient monitor interface, a first input expression indicative of a first parameter source for first patient parameters from a first medical device from a user. The method further includes receiving, at the mobile patient monitor interface, a second input expression indicative of a second parameter source for second patient parameters from a second medical device from a user. The method further includes modifying, at the mobile patient monitor interface, a precedence order of the first parameter source and the second parameter source. The method further includes evaluating, at the mobile patient monitor interface, a complex expression of the first patient parameters and the second patient parameters based on the precedence order to initiate display of at least one parameter, derived parameter, trend, or alert on a remote device. | 03-27-2014 |
20140085076 | SYSTEM, METHOD, AND SOFTWARE FOR CONTROLLING ALERT NOTIFICATIONS - A method for controlling alert notifications includes receiving, at an alert notification monitor, notifications from at least one medical device. The method further includes analyzing, at the alert notification monitor, the notifications based on one or more complex triggers to identify at least one triggered notification. The method further includes transmitting the at least one triggered notification. | 03-27-2014 |
20140081152 | SYSTEM AND METHOD FOR DETERMINING STABILITY OF CARDIAC OUTPUT - A PPG system for determining cardiac stability of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient, wherein the PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system includes a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a cardiac stability analysis module configured to determine an amplitude variance of the PPG signal over a predetermined time period and configured to determine a pulse period variance of the PPG signal over the time period. The cardiac stability analysis module is configured to determine cardiac stability as a function of the amplitude variance and the pulse period variance. | 03-20-2014 |
20140081098 | SENSOR SYSTEM - A sensor system is provided for determining a pulse transit time measurement of a patient. The sensor system includes a carotid sensor device configured to be positioned on a neck of the patient over a carotid artery of the patient. The carotid sensor device is configured to detect a plethysmograph waveform from the carotid artery. The sensor system includes a temporal sensor device that is operatively connected to the carotid sensor device. The temporal sensor device is configured to be positioned on the patient over a temporal artery of the patient. The temporal sensor device is configured to detect a plethysmograph waveform from the temporal artery. | 03-20-2014 |
20140073975 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON THRESHOLD CROSSINGS OF AN AUTOCORRELATION SEQUENCE - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073974 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING AN AUTOCORRELATION SEQUENCE AND A VARIABLE THRESHOLD - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073968 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON TWO SEGMENTS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073967 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON LOW AND HIGH FREQUENCY COMPONENTS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073966 | METHODS AND SYSTEMS FOR DETERMINING ALGORITHM SETTINGS FOR USE IN DETERMINING PHYSIOLOGICAL INFORMATION - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073965 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON POSITIVE AND NEGATIVE VALUES - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073964 | METHODS AND SYSTEMS FOR DETERMINING ALGORITHM SETTINGS BASED ON CLASSIFICATION INFORMATION - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may determine a first metric value indicative of a physiological classification based on the physiological signal. An algorithm setting may be determined based on the physiological classification. The system may determine a second metric value indicative of a different physiological classification based on the physiological signal. A different algorithm may be determined based on the different physiological classification. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal. | 03-13-2014 |
20140073963 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON SEGMENTS FROM A CROSS-CORRELATION SEQUENCE - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073962 | SYSTEM AND METHOD FOR DETERMINING STROKE VOLUME OF A PATIENT - A PPG system for determining a stroke volume of a patient includes a PPG sensor configured to be secured to an anatomical portion of the patient. The PPG sensor is configured to sense a physiological characteristic of the patient. The PPG system may include a monitor operatively connected to the PPG sensor. The monitor receives a PPG signal from the PPG sensor. The monitor includes a pulse trending module determining a slope transit time of an upslope of a primary peak of the PPG signal. The pulse trending module determines a stroke volume of the patient as a function of the slope transit time. | 03-13-2014 |
20140073961 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON SYMMETRY ASSOCIATED WITH A CROSS-CORRELATION SEQUENCE - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073960 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A COMBINED AUTOCORRELATION SEQUENCE - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073959 | METHODS AND SYSTEMS FOR DETERMINING WHEN TO OUTPUT PREVIOUSLY CALCULATED VALUES - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may filter the physiological signal based on an adjustable filter to generate a filtered physiological signal. The system may perform calculations over time based on the filtered physiological signal to determine values indicative of a physiological parameter. The adjustable filter may be adjusted based on the values indicative of the physiological parameter. Some of the calculations are qualified and some of the calculations are disqualified. The system may determine a metric based on the physiological signal that is used to determine whether to output a value based on one or more previously calculated values when a current calculation is disqualified. The system may output a value based on one or more previously calculated values when a current calculation is disqualified and when a criterion based on the metric is satisfied. | 03-13-2014 |
20140073958 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING INITIALIZATION VALUES - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a window of data, and determine physiological information based on the window of data. The generated window of data may include one or more samples of physiological data, from the physiological signal, and one or more initialization values. The initialization values may include random numbers, noise values, sample values, scaled values thereof, or a combination thereof. | 03-13-2014 |
20140073957 | METHODS AND SYSTEMS FOR QUALIFYING CALCULATED VALUES BASED ON A SUM OF DIFFERENCES - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may determine difference values between a first collection of values of the physiological signal and another collection of corresponding value of the physiological signal spaced from the first collection based on the calculated value. The system may sum the difference values, and qualify or disqualify the calculated value based on the sum. The difference values may have positive and negative values, or the system may calculate an absolute value of each difference value prior to summing. The sum may be compared to a threshold to determine whether to qualify or disqualify the calculated value. | 03-13-2014 |
20140073956 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CROSS-CORRELATION WAVEFORM - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073955 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CLASSIFICATION OF A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073954 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING REFERENCE WAVEFORMS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073953 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON THE SHAPE OF AUTOCORRELATION PEAKS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073952 | METHODS AND SYSTEMS FOR CONDITIONING A PHYSIOLOGICAL SIGNAL USING AN ADJUSTABLE BANDPASS FILTER - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may apply a bandpass filter to the physiological signal to assist in the determination of the physiological information. The system may determine a value indicative of a physiological rate and a metric based on the physiological signal. The system may select one or more settings, such as the center frequency and bandwidth, of the bandpass filter based on the rate and based on the metric, and apply the bandpass filter to the physiological signal. | 03-13-2014 |
20140073951 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON AN ALGORITHM SETTING - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073949 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON FAILURE INFORMATION - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073948 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON FAILURE INFORMATION - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073947 | METHODS AND SYSTEMS FOR DETERMINING NOISE INFORMATION FROM A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, and other information, such as noise information, from a physiological signal. The system may generate a difference signal based on the physiological signal and sort the difference signal to generate a sorted difference signal. The system may identify one or more data points of the sorted difference signal as being associated with noise. For example, one or more end data points may be identified as being associated with noise based on a threshold. The system may determine a value indicative of noise based on the identified data points. | 03-13-2014 |
20140073946 | METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A DIFFERENCE SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a first difference signal based on the physiological signal. The system may sort the first difference signal to generate a sorted difference signal. The system may generate a second difference signal based on the sorted difference signal. The system may determine an algorithm setting based on the second difference signal. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal. | 03-13-2014 |
20140073945 | METHODS AND SYSTEMS FOR QUALIFYING A CALCULATED VALUE BASED ON DIFFERENTLY SIZED SORTED DIFFERENCE SIGNALS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a period associated with a physiological rate. The system may generated a first sorted difference signal based on a segment of the physiological signal having a size corresponding to the period. The system may generate second and third sorted difference signals based on segments of the physiological signal having sizes corresponding to a fraction of the period and a multiple of the period. The system may analyze the first, second, and third sorted difference signals, and qualify or disqualify the calculated value based on the analysis. | 03-13-2014 |
20140073944 | METHODS AND SYSTEMS FOR QUALIFYING A CORRELATION LAG VALUE BASED ON A CORRELATION VALUE AT A DIFFERENT LAG - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a correlation sequence using two segments of the physiological signal. The system may determine a first correlation lag value that corresponds to a peak in the correlation sequence, and also determine a second correlation lag value equal to a fraction of the first correlation lag value. The fraction may be, for example, one half. The system may qualify or disqualify the correlation lag value based on the correlation value at the second lag value. The system may compare the correlation value at the second lag value to a threshold, to the correlation sequence at the first lag value, or both. | 03-13-2014 |
20140073943 | METHODS AND SYSTEMS FOR QUALIFYING CALCULATED VALUES BASED ON MULTIPLE DIFFERENCE SIGNALS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may generate and sort multiple difference signals based on the physiological signal. The system may analyze a first sorted difference signal and a second sorted difference signal to determine at least one first metric, and analyze a third sorted difference signal and a fourth sorted difference signal to determine at least one second metric. The system may qualify or disqualify the calculated value based on the at least one first and second metrics. The segments used to generate the third and fourth sorted difference signals may, for example, be subsets of the segments used to generate the first and second sorted difference signals. | 03-13-2014 |
20140073942 | METHODS AND SYSTEMS FOR QUALIFYING A CORRELATION LAG VALUE BASED ON SKEWNESS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may determine a skew metric based on the physiological signal. The system may also determine a correlation lag value corresponding to a peak in a correlation sequence derived from the physiological signal. The system may qualify or disqualify the correlation lag value based on the skew metric. The system may, for example, compare the skew metric and the correlation lag value to a reference set of skew metric values and correlation lag values to determine whether to qualify or disqualify the correlation lag value. | 03-13-2014 |
20140073941 | METHODS AND SYSTEMS FOR QUALIFYING CALCULATED VALUES BASED ON STATE TRANSITIONS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. Based on the value, the system may select pairs of values of the physiological signal that are particularly spaced. The system may determine a state for each pair of values. The state may correspond to a set of criteria such as, for example, equalities, inequalities, logical operators, or other criteria. The system may determine a number of state transitions based on the determined states, and qualify or disqualify the calculated value based on the number of state transitions. | 03-13-2014 |
20140073940 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON STATISTICAL REGRESSION ANALYSIS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may select two segments of the physiological signal, shifted in time relative to one another by a lag value, and determine a correlation value between the two segments. The system may determine a metric based on the segments, and determine correlation information based on the correlation value and the metric. The metric may be indicative of how well the segments are correlated, providing additional information relative to the correlation value. Based on the metric, the system may modify the correlation value, determine a confidence value, or determine other information. The system may determine physiological rate information based on the correlation information. | 03-13-2014 |
20140073939 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CORRELATION MATRIX - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a lag matrix, which includes multiple segments of the physiological signal each having the same number of values. The system may generate a correlation matrix, which includes multiple correlation values, based on the lag matrix. The system may identify a peak in the correlation lag matrix, or a processed matrix derived thereof, and the corresponding lag value. The correlation matrix, or processed matrix thereof, may be rotated, averaged, or otherwise transformed by the system to identify the lag value. The system may determine physiological rate information based on the identified lag value. | 03-13-2014 |
20140073938 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CORRELATION SEQUENCE - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a correlation sequence between two segments of the physiological signal at multiple correlation lag values. The system may compare the correlation sequence to a predetermined threshold, which may vary as a function of lag. Based on the comparison, the system may determine whether the correlation sequence value exceeds the threshold, and whether the correlation sequence value corresponds to a peak. The system may identify a lag value when the correlation sequence corresponding to the lag value exceeds the threshold and corresponds to a peak. The system may determine physiological rate information based on the identified lag value. | 03-13-2014 |
20140073937 | METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION USING A NORMALIZATION TECHNIQUE - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may condition the physiological signal to assist in the determination of the physiological information. The system may generate absolute values of the physiological signal, filter the absolute values, and modify the physiological signal based on the filtered signal. The filtered signal may be shifted in amplitude prior to modifying the physiological signal. The modification may include dividing the physiological signal by the filtered signal to normalize the physiological signal. | 03-13-2014 |
20140073936 | METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION BASED ON A STABILITY FUNCTION - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may condition the physiological signal to assist in the determination of the physiological information. The system may generate a signal based on a stability function applied to the physiological signal. The stability function may include a Lyapunov function. The system may generate a difference signal based on the stability function, and modify the physiological signal based on the difference signal. The modification may include reducing, or otherwise limiting, some differences between adjacent values in the physiological signal, removing portions of the physiological signal, or other modifications. | 03-13-2014 |
20140073935 | METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION USING A NORMALIZATION TECHNIQUE - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may condition the physiological signal to assist in the determination of the physiological information. The system may generate a positive signal and a negative signal based on respective positive and negative values of the physiological signal. The system may filter the positive and negative signals, combine the filtered signals, and modify the physiological signal based on the combined signal. The physiological signal may be modified, for example, by subtracting the combined signal from the physiological signal. | 03-13-2014 |
20140073934 | METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION BASED ON A SORTED DIFFERENCE SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may condition the physiological signal to assist in the determination of the physiological information. The system may generate a difference signal based on the physiological signal and sort the difference signal. The system may identify values in the sorted difference signal that exceed a threshold, and modify the physiological signal based on the identified values. The modification may include reducing, or otherwise limiting, some differences between adjacent values in the physiological signal. | 03-13-2014 |
20140073933 | METHODS AND SYSTEMS FOR CONDITIONING PHYSIOLOGICAL INFORMATION BASED ON CALCULATED DIFFERENCES - A physiological monitoring system may determine physiological information, such as physiological rate information, from physiological data. The system may condition the physiological data to assist in the determination of the physiological information. The system may calculate differences based on the physiological data and identify differences that exceed a threshold. The calculated differences may, for example, be a derivative signal. The system may modify the physiological data based on the identified differences. The modification may include reducing, or otherwise limiting, some differences between adjacent values in the physiological data. | 03-13-2014 |
20140073932 | METHODS AND SYSTEMS FOR DETERMINING SIGNAL-TO-NOISE INFORMATION FROM A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, and other information, such as signal-to-noise information, from a physiological signal. The system may generate at least one difference signal based on the physiological signal and sort the at least one difference signal to generate at least one sorted difference signal. The system may analyze the at least one sorted difference signal to determine at least two values indicative of noise. The system may determine a value indicative of a signal-to-noise ratio based on the two or more values indicative of noise. | 03-13-2014 |
20140073930 | MEASURE OF BRAIN VASCULATURE COMPLIANCE AS A MEASURE OF AUTOREGULATION - A system includes a controller that receives a physiological signal representing a non-invasive measure of a physiological parameter. The controller applies a compliance metric to the physiological signal and generates an autoregulation status signal that indicates a status of cerebral autoregulation in the patient. The autoregulation status signal is based at least in part on the compliance metric applied to the physiological signal. | 03-13-2014 |
20140073900 | SYSTEM AND METHOD FOR MEASURING CARDIAC OUTPUT - Embodiments of the present disclosure relate to a system and method for non-invasively determining a cardiac output of a patient that may include a photoacoustic sensor and a determination of oxygen uptake of the patient. Specifically, a signal from a photoacoustic sensor may be used to determine a mixed venous and an arterial oxygen saturation of the patient. The parameters of mixed venous and arterial oxygen saturation in conjunction with oxygen uptake may be used to calculate cardiac output using the Fick method. | 03-13-2014 |
20140073899 | PHOTOACOUSTIC SENSOR SYSTEM - A sensor fixture is provided for operatively attaching a photoacoustic (PA) sensor to a patient. The sensor fixture includes an acoustic coupling agent that is configured to allow the transmission of both acoustic energy and light therethrough. The sensor fixture includes a bracket configured to be affixed to skin of the patient. The bracket includes a cavity, a patient side, and a sensor side. The acoustic coupling agent is held within the cavity. The patient side includes a patient opening that is configured to expose the acoustic coupling agent along the patient side. The sensor side includes a sensor opening that is configured to expose the acoustic coupling agent along the sensor side. The sensor side includes a sensor cradle that is configured to hold the PA sensor such that the PA sensor is operatively attached to the acoustic coupling agent for receiving an acoustic response from the patient. | 03-13-2014 |
20140073898 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON SEGMENTS OF A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073890 | SYSTEMS AND METHODS FOR DETERMINING FLUID RESPONSIVENESS - A system is provided including a respiratory detection module, a circulatory detection module, and an analysis module. The respiratory detection module is configured to detect respiratory information representative of respiration of a patient. The circulatory detection module configured to detect circulatory information representative of circulation of the patient. The analysis module is configured to obtain a respiratory waveform based at least in part on the respiratory information, obtain a circulatory waveform based at least in part on the circulatory information, combine the respiratory waveform and the circulatory waveform to provide a mixed waveform, and isolate a portion of the mixed waveform to identify a respiratory responsiveness waveform representative of an effect of the respiration of the patient on the mixed waveform. | 03-13-2014 |
20140073889 | SYSTEMS AND METHODS FOR DETERMINING FLUID RESPONSIVENESS - A system is provided including a ventilator detection module, a circulatory detection module, and an analysis module. The ventilator detection module is configured to detect ventilator information representative of a ventilation activity. The circulatory detection module is configured to detect circulatory information representative of the circulation of the patient. The analysis module is configured to obtain a ventilator waveform based at least in part on the ventilator information, obtain a circulatory waveform based at least in part on the circulatory information, combine the ventilator waveform and the circulatory waveform to provide a mixed waveform, and isolate a portion of the mixed waveform to identify a ventilator responsiveness waveform representative of an effect of the ventilator. | 03-13-2014 |
20140073888 | NON-INVASIVE METHOD FOR MONITORING AUTOREGULATION - A system includes a controller that receives a blood pressure signal and an oxygen saturation signal. The blood pressure signal represents a non-invasive measure of blood pressure. The oxygen saturation signal represents a non-invasive measure of oxygen saturation. The controller generates an autoregulation status signal representing a status of cerebral autoregulation. The autoregulation status signal is based, at least in part, on a relationship between the measured blood pressure and the measured oxygen saturation. An exemplary method may include receiving the blood pressure signal and the oxygen saturation signal, defining a relationship between the measured blood pressure and the measured oxygen saturation, determining an autoregulation status based at least in part on the defined relationship, and generating an autoregulation status signal representing the determined autoregulation status. | 03-13-2014 |
20140073878 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING AUTOCORRELATION BASED ON A MODIFIED SIGNAL - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073877 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING AUTOCORRELATION AND AN ENVELOPE TECHNIQUE - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073876 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON CROSS-CORRELATIONS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073875 | METHODS AND SYSTEMS FOR QUALIFYING PHYSIOLOGICAL VALUES BASED ON METRICS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073874 | METHODS AND SYSTEMS FOR DETERMINING NOISE INFORMATION FROM A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, and other information, such as noise information, from a physiological signal. The system may generate a difference signal based on the physiological signal and sort the difference signal to generate a sorted difference signal. The system may determine slope values for multiple segments of the sorted difference signal. The system may determine two end groups of the segments and determine at least one threshold based on the end groups. One or more end data points of the sorted difference signal may be identified as being associated with noise based on the at least one threshold. The system may determine a value indicative of noise based on the identified data points. | 03-13-2014 |
20140073873 | METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A SKEW METRIC - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may determine a skew metric based on the physiological signal. The system may determine an algorithm setting based on a reference relationship between the determined skew metric and a value indicative of a physiological rate. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal. | 03-13-2014 |
20140073872 | METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A DIFFERENCE SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a difference signal based on the physiological signal. The system may determine positive areas associated with positive regions of the difference signal and negative areas associated with negative regions of the difference signal. The system may determine area ratios based on adjacent positive and negative regions of the difference signal. The system may determine an algorithm setting based on the area ratios. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal. | 03-13-2014 |
20140073871 | METHODS AND SYSTEMS FOR DETERMINING AN ALGORITHM SETTING BASED ON A DIFFERENCE SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a difference signal based on the physiological signal and sort the difference signal to generate a sorted difference signal. The system may identify a midpoint of a first segment of the difference signal and a midpoint of a second segment of the difference signal. The first segment may correspond to positive values of the difference signal and the second segment may correspond to negative values of the difference signal. The system may determine an algorithm setting based on the first midpoint and the second midpoint. The algorithm setting may, for example, affect the amount of filtering applied to the physiological signal. | 03-13-2014 |
20140073870 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A PEAK OF A CROSS-CORRELATION - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073869 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING STATUS INDICATORS - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may generate a window of physiological data, and determine the physiological information based on the window of data. The system may use status indicators to determine when the window of data is to be updated with new data. The status indicator may include, for example, a gain change indicator, indicating a change in gain in an amplifier. Based on the status indicator, the system may, for example, set a period of time during which current physiological data is not added to the window of data. The system may smooth the transition of the physiological data before and after the period of time. | 03-13-2014 |
20140073868 | METHODS AND SYSTEMS FOR ADJUSTING A CRITERION FOR QUALIFYING A CALCULATED VALUE - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may determine a value indicative of noise in the physiological signal and adjust at least one criterion for qualifying or disqualifying the calculated value based on the value indicative of noise. The criterion may, for example, be a threshold and the threshold may be adjusted based on the value indicative of noise. The system may qualify or disqualify the calculated value based on the at least one adjusted criterion. | 03-13-2014 |
20140073867 | METHODS AND SYSTEMS FOR QUALIFYING A CALCULATED VALUE BASED ON BASELINE AND DEVIATION INFORMATION - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a period associated with a physiological rate. The system may determine a first value indicative of a baseline of the physiological signal and a second value indicative of a deviation of the physiological signal from the baseline. The first value may, for example, be a median value, an average, or a coefficient corresponding to a best fit curve of the physiological signal. The second value may be a standard deviation value, a standard error, or a root mean square value based on the physiological signal. The system may qualify or disqualify the calculated value based on the first and second values. | 03-13-2014 |
20140073866 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON A CROSS-CORRELATION WAVEFORM - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073865 | METHODS AND SYSTEMS FOR QUALIFYING CALCULATED VALUES BASED ON A STATISTICAL METRIC - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may receive a calculated value indicative of a physiological rate. The system may generate value pairs from a first collection of values of the physiological signal and another collection of corresponding value of the physiological signal spaced from the first collection based on the calculated value. The system may determine a best fit linear relationship based on the value pairs and determine at least one statistical metric based on the linear relationship and the value pairs. The system may qualify or disqualify the calculated value based on the at least one statistical metric. | 03-13-2014 |
20140073864 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION BASED ON FAST START PARAMETERS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073863 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL INFORMATION USING MODULATED SIGNALS - A physiological monitoring system may process a physiological signal such a photoplethysmograph signal from a subject. The system may determine physiological information, such as a physiological rate, from the physiological signal. The system may use search techniques and qualification techniques to determine one or more initialization parameters. The initialization parameters may be used to calculate and qualify a physiological rate. The system may use signal conditioning to reduce noise in the physiological signal and to improve the determination of physiological information. The system may use qualification techniques to confirm determined physiological parameters. The system may also use autocorrelation techniques, cross-correlation techniques, fast start techniques, and/or reference waveforms when processing the physiological signal. | 03-13-2014 |
20140073862 | METHODS AND SYSTEMS FOR SELECTIVELY FILTERING A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, from a physiological signal. The system may apply a digital filter to the physiological signal to assist in the determination of the physiological information. The system may determine a metric based on the physiological signal, and selectively apply the digital filter to the physiological signal based on the metric. The digital filter, which may include two or more filter coefficients, may correspond to a weighted sum of the physiological signal and a difference signal corresponding to the physiological signal. The filter coefficients may be adjustable, allowing selectivity in the characteristics of the digital filter between weighting the physiological signal and difference signal. | 03-13-2014 |
20140073861 | METHODS AND SYSTEMS FOR DETERMINING NOISE INFORMATION FROM A PHYSIOLOGICAL SIGNAL - A physiological monitoring system may determine physiological information, such as physiological rate information, and other information, such as noise information, from a physiological signal. The system may generate a first difference signal based on a first segment of the physiological signal and sort the first difference signal to generate a first sorted difference signal. The system may generate a second difference signal based on a second segment of the physiological signal and sort the second difference signal to generate a second sorted difference signal. The first and second sorted difference signals may be analyzed and a value indicative of noise may be determined based on the analysis. | 03-13-2014 |
20140066797 | SYSTEMS AND METHODS FOR ANALYZING CHANGES IN CARDIAC OUTPUT - A system is provided including a cardiac output monitor configured to be operatively connected to a detection module that obtains electrocardiogram (ECG) signals from the patient. The monitor includes an axis analysis module and a cardiac output module. The axis analysis module is configured to obtain ECG axis information including information corresponding to at least one ECG axis of a patient. The axis analysis module is also configured to determine ECG axis change information corresponding to a change in the ECG axis information of the patient. The cardiac output analysis module is configured to determine a change in cardiac output using the ECG axis change information. | 03-06-2014 |
20140066785 | SYSTEM AND METHOD FOR DETERMINING STROKE VOLUME OF AN INDIVIDUAL - A system for determining stroke volume of an individual. The system includes a skew-determining module that is configured to calculate a first derivative of photoplethysmogram (PPG) signals of the individual. The first derivative forms a derivative waveform. The skew-determining module is configured to determine a skew metric of the first derivative, wherein the skew metric is indicative of a morphology of at least one pulse wave detected from blood flow of the individual in the derivative waveform. The system also includes an analysis module that is configured to determine a stroke volume of the individual. The stroke volume is a function of the skew metric of the first derivative. | 03-06-2014 |
20140066782 | SYSTEM AND METHOD FOR DETERMINING A RESTING HEART RATE OF AN INDIVIDUAL - A system to determine a resting heart rate (HR) of an individual. The system may include a monitor that is configured to be operatively connected to a sensor that obtains physiological signals from an individual. The monitor is configured to receive the physiological signals from the sensor. The monitor may include a validation module that is configured to analyze the physiological signals to identify valid heart beats from the physiological signals. The monitor may also include a rate-determining module that is configured to determine an HR signal that is based on the valid heart beats. The HR signal includes a series of data points. The monitor may also include an analysis module that is configured to analyze the HR signal and identify baseline data points from the series of data points. The analysis module is configured to calculate the resting HR based on the baseline data points. | 03-06-2014 |
20140066732 | SYSTEM AND METHOD FOR DETERMINING CARDIAC OUTPUT - A system is configured to determine cardiac output of a patient. The system may include a first sub-system configured to detect a first physiological signal, and a second sub-system configured to detect a second physiological signal that differs from the first physiological signal. The first and second sub-systems may be separate and distinct from one another. The system may also include a cardiac output determination module that is configured to determine the cardiac output based, at least in part, on the first and second physiological signals. | 03-06-2014 |
20140065952 | SYSTEM, METHOD, AND SOFTWARE FOR CONFIGURING COMMUNICATION WITH MEDICAL DEVICES - A method for configuring communication with medical devices includes a receiving, at a configuration interface, a first input indicative of first configuration parameters for a first medical device from a user and a second input indicative of second configuration parameters for a second medical device from the user. The first configuration parameters include at least one of a frequency parameter, a selection parameter, a compression parameter, an output parameter, and a port parameter. The method further includes receiving, at the configuration interface, first patient parameters from the first medical device and second patient parameters from the second medical device. The method further includes transmitting a first selected subset of the first patient parameters based on the first configuration parameters and transmitting a second selected subset of the second patient parameters based on the second configuration parameters. | 03-06-2014 |
20140060541 | METHOD AND SYSTEM FOR EVALUATION OF PATIENT BREATHING STAGES - The disclosure relates generally to a method and a system for acquiring patient parameters and indicating the status of patient parameter relationship expressions for a selected breathing stage from a plurality of breathing stages. | 03-06-2014 |
20140060540 | METHOD AND SYSTEM FOR AUTOMATED SPONTANEOUS BREATHING TRIAL - The disclosure relates generally to a method and a system for acquiring patient parameters of a plurality of patient parameter relationship expressions and performing an automated spontaneous breathing trial. In the event of a successful trial, constructive notice of the success is provided. | 03-06-2014 |
20140058714 | DYNAMIC CONFIGURABLE CLINICAL ANALYSIS - A patient monitoring system includes monitoring service that receives parameter values from a number of data sources. A status model manager facilitates creation of a clinical status model that includes conditions defining relationships between parameters and thresholds. The status model manager evaluates the clinical status model based on the parameter values to determine a clinical status of a patient. | 02-27-2014 |
20140058229 | SYSTEM AND METHOD FOR DETECTING FLUID RESPONSIVENESS OF A PATIENT - A system is configured to determine a fluid responsiveness index of a patient from a physiological signal. The system may include a sensor configured to be secured to an anatomical portion of the patient, and a monitor operatively connected to the sensor. The sensor is configured to sense a physiological characteristic of the patient. The monitor is configured to receive a physiological signal from the sensor. The monitor may include an index-determining module configured to determine the fluid responsiveness index through formation of a ratio of one or both of amplitude or frequency modulation of the physiological signal to baseline modulation of the physiological signal. | 02-27-2014 |
20140049770 | DETERMINING ABSORPTION COEFFICIENTS IN A PHOTOACOUSTIC SYSTEM - A physiological monitoring system may use photoacoustic sensing to determine physiological information of a subject. The photoacoustic monitoring system may use a light source, such as a modulated continuous wave laser diode, to provide a frequency modulated photonic signal (e.g., a chirp signal) to the subject. An acoustic detector may be used to detect an acoustic pressure signal from the subject. The acoustic pressure signal may include two components corresponding to two wavelengths of light in the photonic signal. A signal ratio may be calculated based on the two components. The photoacoustic monitoring system may use the signal ratio to calculate one or more absorption coefficients. The photoacoustic monitoring system may use the one or more absorption coefficients to determine additional physiological information such as hemoglobin concentration, blood oxygen saturation, and temperature. | 02-20-2014 |
20140044201 | SYSTEM, METHOD, AND SOFTWARE FOR COMMUNICATING WITH MEDICAL DEVICES - A method for communicating with medical devices includes receiving, at a medical device communication interface, patient parameters from a first and second medical device in a respective first and second format. The method further includes identifying, at the medical device communication interface, a first and second protocol associated with the patient parameters by comparing the patient parameters and the first and second format to a predefined schema. The method further includes modifying, at the medical device communication interface, a respective configuration parameter for each of the first and second medical devices. The method further includes translating the patient parameters based on the first and second identified protocols and the respective configuration parameter for each of the first and second medical devices. | 02-13-2014 |
20140034054 | VENTILATOR-INITIATED PROMPT OR SETTING REGARDING DETECTION OF ASYNCHRONY DURING VENTILATION - This disclosure describes systems and methods for monitoring and evaluating ventilatory parameters, analyzing those parameters and providing useful notifications and recommendations to clinicians. That is, modern ventilators monitor, evaluate, and graphically represent multiple ventilatory parameters. However, many clinicians may not easily recognize data patterns and correlations indicative of certain patient conditions, changes in patient condition, and/or effectiveness of ventilatory treatment. Further, clinicians may not readily determine appropriate ventilatory adjustments that may address certain patient conditions and/or the effectiveness of ventilatory treatment. Specifically, clinicians may not readily detect or recognize the presence of asynchrony during ventilation. According to embodiments, a ventilator may be configured to monitor and evaluate diverse ventilatory parameters to detect asynchrony and may issue notifications and recommendations suitable for a patient to the clinician when asynchrony is implicated. The suitable notifications and recommendations may further be provided in a hierarchical format. | 02-06-2014 |
20140034048 | COMPRESSIBLE CONNECTOR FOR AN INNER CANNULA - A tracheal tube assembly includes an outer cannula configured to be positioned in a patient airway and an inner cannula configured to be disposed inside the outer cannula. The tracheal tube assembly further includes a flange member secured about the outer cannula, and an outer cannula connector coupled to a proximal end of the outer cannula. The inner cannula includes a compressible proximal end region that is compressed while secured inside the outer cannula connector. | 02-06-2014 |
20140033103 | SYSTEM, METHOD, AND SOFTWARE FOR PATIENT MONITORING - A method for patient monitoring includes receiving first patient parameters from at least one machine. The method further includes transforming the first patient parameters into display parameters comprising at least one of a patient identifier, a patient status, and an alarm condition. Transforming is performed such that a first set of the display parameters is operable to be displayed on a screen, a second set of the display parameters is operable to be displayed on the screen in response to a rotation of the screen in a first direction, and a third set of the display parameters is operable to be displayed on the screen in response to a rotation of the screen in a second direction. The second set of the display parameters is not identical to the third set of the display parameters. The method further includes updating the display parameters in response to receiving second patient parameters. | 01-30-2014 |
20140014095 | TRACHEAL TUBE WITH INNER CANNULA INDICATION SYSTEM - A tracheal tube assembly includes an outer cannula having a distal end and a proximal end, the distal end being adapted to be inserted into an airway of a patient. The assembly also includes an inner cannula adapted to be inserted into the outer cannula, a flange member disposed about the proximal end of the outer cannula, and a connector coupled to the proximal end of the outer cannula. The inner cannula and the connector form a contiguous passageway for exchanging fluid with the airway of the patient in operation. The assembly further includes an inner cannula status indication system that receives information regarding whether or not the inner cannula is an operable position with respect to the outer cannula, and, via the status indicator, provides a visual indication of whether or not the inner cannula is an operable position with respect to the outer cannula. | 01-16-2014 |
20140012150 | SYSTEMS AND METHODS FOR MISSED BREATH DETECTION AND INDICATION - This disclosure describes improved systems and methods for displaying respiratory data to a clinician in a ventilatory system. Respiratory data may be displayed by any number of suitable means, for example, via appropriate graphs, diagrams, charts, waveforms, and other graphic displays. The disclosure describes novel systems and methods for determining and displaying ineffective patient inspiratory or expiratory efforts or missed breaths in a manner easily deciphered by a clinician. | 01-09-2014 |
20140002265 | System, Method, And Software For Automating Complex Alerts | 01-02-2014 |
20140000606 | METHODS AND SYSTEMS FOR MIMICKING FLUCTUATIONS IN DELIVERED FLOW AND/OR PRESSURE DURING VENTILATION | 01-02-2014 |
20130331710 | Pathlength Enhancement of Optical Measurement of Physiological Blood Parameters - Systems and methods for measuring a physiological parameter of tissue in a patient are provided herein. In a first example, a method of measuring a physiological parameter of blood in a patient is provided. The method includes emitting at least two optical signals for propagation through tissue of the patient, detecting the optical signals after propagation, identifying propagation pathlengths of the optical signals, and identifying detected intensities of the optical signals. The method also includes processing at least the propagation pathlengths to scale the detected intensities for determination of a value of the physiological parameter. | 12-12-2013 |
20130324856 | METHODS AND SYSTEMS FOR POWER OPTIMIZATION IN A MEDICAL DEVICE - A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger. | 12-05-2013 |
20130324855 | METHODS AND SYSTEMS FOR POWER OPTIMIZATION IN A MEDICAL DEVICE - A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger. | 12-05-2013 |
20130324811 | OPTICAL INSTRUMENT WITH AMBIENT LIGHT REMOVAL - Processing circuitry may process a physiological signal such as a light signal attenuated by a subject. The physiological signal may include a desired component and an undesired component. A first filtering operation may be performed to remove at least a portion of the undesired component and a second filtering operation may be performed to reduce an undesired distortion introduced by the first filter. The transfer function of the second filter may be substantially the inverse of the transfer function of the first filter. One or more physiological parameters may be determined based on the filtered physiological signal. | 12-05-2013 |
20130324809 | METHODS AND SYSTEMS FOR POWER OPTIMIZATION IN A MEDICAL DEVICE - A physiological monitoring system may use photonic signals to determine physiological parameters. The system may vary parameters of a light drive signal used to generate the photonic signal from a light source such that power consumption is reduced or optimized. Parameters may include light intensity, firing rate, duty cycle, other suitable parameters, or any combination thereof. In some embodiments, the system may use information from a first light source to generate a light drive signal for a second light source. In some embodiments, the system may vary parameters in a way substantially synchronous with physiological pulses, for example, cardiac pulses. In some embodiments, the system may vary parameters in response to an external trigger. | 12-05-2013 |
20130317325 | APPARATUS AND METHOD FOR MEASUREMENT OF PHYSIOLOGICAL PARAMETERS IN TISSUE OF A PATIENT - A system to optically measure a physiological parameter of tissue of a patient is provided. The system includes a tissue interface assembly configured to emit an optical signal into the tissue, receive a first measurement signal based on the optical signal propagating along a first path, receive a second measurement signal based on the optical signal propagating along a second path, and transfer the first measurement signal and the second measurement signal for delivery to a processing system. The processing system is coupled to the tissue interface assembly and configured to receive the first measurement signal and the second measurement signal, determine a phase delay between the first measurement signal and the second measurement signal based on a cross correlation analysis, and identify a value of the physiological parameter of the patient based on at least the phase delay between the first measurement signal and the second measurement signal. | 11-28-2013 |
20130296670 | Wireless, Reusable, Rechargeable Medical Sensors and System for Recharging and Disinfecting the Same - Embodiments described herein may include systems and method for monitoring physiological parameters of a patient. Specifically, embodiments disclose wireless, reusable, rechargeable medical sensors that include an inductive coil coupled to a rechargeable battery. Additionally, embodiments disclose systems and methods for recharging and disinfecting the disclosed medical sensors. | 11-07-2013 |
20130296669 | Wireless, Reusable, Rechargeable Medical Sensors and System for Recharging and Disinfecting the Same - Embodiments described herein may include systems and method for monitoring physiological parameters of a patient. Specifically, embodiments disclose wireless, reusable, rechargeable medical sensors that include an inductive coil coupled to a rechargeable battery. Additionally, embodiments disclose systems and methods for recharging and disinfecting the disclosed medical sensors. | 11-07-2013 |
20130294969 | Wireless, Reusable, Rechargeable Medical Sensors and System for Recharging and Disinfecting the Same - Embodiments described herein may include systems and method for monitoring physiological parameters of a patient. Specifically, embodiments disclose wireless, reusable, rechargeable medical sensors that include an inductive coil coupled to a rechargeable battery. Additionally, embodiments disclose systems and methods for recharging and disinfecting the disclosed medical sensors. | 11-07-2013 |
20130291871 | CUFF PRESSURE MEASUREMENT DEVICE FOR A TRACHEAL TUBE - According to various embodiments, methods and systems for determining pressure in an inflatable cuff of a tracheal tube may employ pressure transducers associated with a cuff inflation line or a pilot balloon assembly. The pressure transducers may be implemented to provide continuous or intermittent cuff pressure. Also provided are tracheal tubes with adapters or other devices that incorporate pressure transducers. The tracheal tubes may facilitate wireless cuff pressure monitoring. | 11-07-2013 |
20130284177 | MINIMIZING IMPOSED EXPIRATORY RESISTANCE OF MECHANICAL VENTILATOR BY OPTIMIZING EXHALATION VALVE CONTROL - This disclosure describes systems and methods for controlling an exhalation valve based on pressure and/or flow measurements during exhalation. The disclosure describes novel exhalation valve controls for ventilating a patient. | 10-31-2013 |
20130284172 | METHODS AND SYSTEMS FOR AN OPTIMIZED PROPORTIONAL ASSIST VENTILATION - This disclosure describes systems and methods for providing an optimized proportional assist breath type during ventilation of a patient. The disclosure describes a novel breath type that delivers a target airway pressure calculated based on a desired patient effort range to a triggering patient. | 10-31-2013 |
20130274611 | OPTICAL INTERFACE SYSTEMS FOR APPLICATION OF OPTICAL SIGNALS INTO TISSUE OF A PATIENT - Systems and methods for applying optical signals onto tissue of a patient are provided herein. In one example, a system to optically analyze tissue of a patient is provided. The system includes a measurement system configured to transfer source optical signals over an optical link, receive measurement optical signals over the optical link, and identify a value of a physiological parameter of the patient. The optical link comprises a first source portion with a first link property configured to carry the source optical signals and a second source portion with a second link property coupled to the first source portion and configured to carry the source optical signals. The system includes a tissue interface assembly configured to receive the source optical signals transferred over the optical link, emit the source optical signals into the tissue, and receive the measurement optical signals from the tissue for transfer over the optical link. | 10-17-2013 |
20130255685 | METHODS AND SYSTEMS FOR TRIGGERING WITH UNKNOWN BASE FLOW - This disclosure describes systems and methods for providing novel back-up ventilation that allows the patient to trigger or initiate the delivery of breath. Further, this disclosure describes systems and methods for triggering ventilation when base flow is unknown or undeterminable by the ventilator. | 10-03-2013 |
20130255682 | METHODS AND SYSTEMS FOR COMPENSATION OF TUBING RELATED LOSS EFFECTS - A method for ventilating a patient with a ventilator includes consecutively delivering a plurality of substantially equal volume amounts into a closed ventilator circuit during a ventilator self-test, receiving a pressure measurement for each volume delivery, calculating a change in pressure for each volume delivery, consecutively releasing a plurality of substantially equal volume amounts from the closed ventilator circuit during the ventilator self-test, calculating a change in pressure for each volume release, fitting the calculated change in pressure data for volume delivery and volume release to an inhalation non-linear model equation and an exhalation non-linear model equation, respectively, deriving one or more inhalation tubing compliance compensation coefficients from the inhalation non-linear model equation, and deriving one or more exhalation tubing compliance compensation coefficients from the exhalation non-linear model equation. | 10-03-2013 |
20130255681 | DATA COLLECTION SYSTEM AND METHOD USING PARAMETRIC-BASED SAMPLING RATES - The present disclosure relates to a system and method for sampling parametric data provided with a patient monitoring device. A disclosed method includes sampling parametric data associated with a patient and adjusting a sampling interval during the sampling of the parametric data based on a change in a frequency of a periodic physiological event associated with the patient. A disclosed system includes a server computer operative to sample parametric data associated with a patient and to adjust a sampling interval during the sampling of the parametric data based on a change in a frequency of a periodic physiological event associated with the patient. | 10-03-2013 |
20130253333 | TISSUE INTERFACE ELEMENTS FOR APPLICATION OF OPTICAL SIGNALS INTO TISSUE OF A PATIENT - Systems and methods for applying optical signals into tissue of a patient are provided herein. In one example, a tissue interface pad for applying an optical signal to tissue of a patient is provided. The tissue interface pad includes a first surface configured to interface with the tissue of the patient, at least one guide channel disposed within the tissue interface pad and configured to route an input optical fiber carrying the optical signal to a first location in the tissue interface pad, and a second surface at the first location configured to direct the optical signal from the input optical fiber into the tissue through the first surface. | 09-26-2013 |
20130253332 | TISSUE INTERFACE SYSTEMS FOR APPLICATION OF OPTICAL SIGNALS INTO TISSUE OF A PATIENT - Systems and methods for applying optical signals into tissue of a patient are provided herein. In one example, a tissue interface system for applying optical signals to tissue of a patient is provided. The tissue interface system includes a tissue interface pad configured to apply the optical signals carried by at least one optical source into the tissue, and a pressurized volume configured to apply pressure to the tissue interface pad to couple a portion of the tissue interface pad to the tissue. | 09-26-2013 |
20130226009 | HYPOVOLEMIA DIAGNOSIS TECHNIQUE - Embodiments of the present disclosure relate to a system and method for determining a risk, onset, or presence of hypovolemia based on one or more features of a plethysmographic waveform during a patient breathing cycle. For example, a hypovolemic patient may exhibit characteristic changes in pulse amplitude or stroke volume during inhalation and exhalation relative to a healthy patient. Further, a trend or pattern of such features may be used to assess the patient's fluid condition. | 08-29-2013 |
20130225952 | SYSTEM AND METHOD FOR STORING AND PROVIDING PATIENT-RELATED DATA - According to various embodiments, a regional oximetry sensor may include a light emitting element configured to emit light, a light detector configured to receive the light, and a memory device configured to store a baseline. The baseline stored by the memory device enables a regional oximetry monitor to display the baseline on a display of the regional oximetry monitor. | 08-29-2013 |
20130220333 | TRACHEAL TUBE WITH CUSTOMIZABLE FLANGES - A tracheal tube assembly includes a cannula configured to be positioned in a patient airway and a customizable flange configured to be secured about the cannula. The customizable flange further includes a first flange portion and a second flange portion. The second flange portion is configured to be selectively removed from the customizable flange to customize the length of the customizable flange. | 08-29-2013 |
20130220324 | SYSTEMS AND METHODS FOR PROVIDING OSCILLATORY PRESSURE CONTROL VENTILATION - A method for ventilating a patient with a ventilator includes receiving a target pressure input for a breathing phase, receiving at least one oscillation parameter, imposing an oscillatory waveform on the target pressure, the oscillatory waveform having characteristics defined by the at least one oscillation parameter and configured to oscillate substantially about the target pressure for at least a portion of the breathing phase, and delivering an amount of flow sufficient to achieve an oscillatory target pressure based on the imposed oscillatory waveform. | 08-29-2013 |
20130192599 | USING ESTIMATED CARINAL PRESSURE FOR FEEDBACK CONTROL OF CARINAL PRESSURE DURING VENTILATION - This disclosure describes systems and methods for configuring a ventilator to estimate the carinal pressure to minimize the work of breathing due to a breathing tube. A patient's carina is a cartilaginous ridge located at the site of the tracheal bifurcation between the two primary bronchi. According to embodiments, an estimated carinal pressure may be determined and used as feedback control for the carinal pressure. An estimated carinal pressure refers to a pressure estimated to exist at the patient carina. According to embodiments, the estimated carinal pressure may be compared to the carinal pressure command to determine an error. The carinal pressure command may be positive end expiratory pressure (PEEP) or some other suitable target pressure. The error between the estimated carinal pressure and the carinal pressure command may then be used as feedback control to achieve the carinal pressure command and thereby to minimize the work of breathing due to the breathing tube. | 08-01-2013 |
20130190589 | MULTIPLE PEAK ANALYSIS IN A PHOTOACOUSTIC SYSTEM - A physiological monitoring system may use photoacoustic sensing to determine one or more physiological parameters of a subject. A photoacoustic signal generated in response to a photonic signal may include multiple peaks as a result of multiple blood vessels and other structures below the surface of the skin of a subject. A photoacoustic system may identify a first and second peak in the photoacoustic signal and determine values from the peaks indicative of physiological parameters. Physiological parameters, such as venous oxygen saturation and arterial oxygen saturation, may be determined based on the values. | 07-25-2013 |
20130184555 | ORAL CAVITY MOUNTED PHOTOACOUSTIC SENSING UNIT - An oral cavity mounted photoacoustic sensing unit is disclosed. The sensing unit may include a light source, a photoacoustic detector, and a support assembly. The support assembly may be configured such that the light source and the photoacoustic detector are fixably located relative to the buccal or sublingual tissue of a subject. | 07-18-2013 |
20130184544 | BODY-MOUNTED PHOTOACOUSTIC SENSOR UNIT FOR SUBJECT MONITORING - A body-mounted photoacoustic sensor unit may use photoacoustic sensing to determine one or more physiological parameters of a subject. The body-mounted photoacoustic sensor unit may fixably locate a light source and photoacoustic detector relative to a target area. The photoacoustic detector may detect an acoustic pressure response generated by the application and absorption of light from the light source. | 07-18-2013 |
20130167843 | PIEZOELECTRIC BLOWER PILOTED VALVE - This disclosure describes systems and methods for piloting a pneumatic valve using one or more piezoelectric blowers. According to embodiments, the one or more piezoelectric blowers may be coupled to the pneumatic valve to form a small, light-weight pneumatic valve that may be placed proximal to a ventilated patient, e.g., at the patient wye or the patient interface. Due to the close coupling of the one or more piezoelectric blowers, the pneumatic valve has a substantially shorter response time than traditional pneumatically piloted valves. Moreover, when piezoelectric blowers are coupled to the pneumatic valve in parallel, response time may be further decreased. Additionally or alternatively, when piezoelectric blowers are coupled to the pneumatic valve in series, pilot pressure may be increased as a function of the number of piezoelectric blowers in the series. | 07-04-2013 |
20130167842 | METHODS AND SYSTEMS FOR ADAPTIVE BASE FLOW AND LEAK COMPENSATION - This disclosure describes systems and methods for providing adaptive base flow scheduling during ventilation of a patient to optimize patient-machine synchrony and accuracy of estimated exhaled as well as inhaled tidal volumes. Further, this disclosure describes systems and methods for providing adaptive inspiratory trigger threshold scheduling during the adaptive base flow scheduling. Further still, this disclosure describes systems and methods for determining an estimated leak flow and adjusting the adaptive base flow scheduling and the adaptive inspiratory trigger threshold scheduling based on the estimated leak flow. Moreover, this disclosure describes systems and methods for determining a change in the estimated leak flow and adjusting the adaptive base flow scheduling and the adaptive inspiratory trigger threshold scheduling based on the change in the estimated leak flow. | 07-04-2013 |
20130158413 | OPTICAL MEASUREMENT OF PHYSIOLOGICAL BLOOD PARAMETERS - Systems and methods for measuring a physiological parameter of tissue in a patient are provided herein, such as a system to optically analyze tissue of a patient. An example system includes a tissue interface assembly configured to emit an input optical signal into the tissue, receive a reference optical signal and a measurement optical signal from the tissue, and transfer the reference optical signal and the measurement optical signal to the optical link. The optical link is configured to transfer the reference optical signal and the measurement optical signal. The transceiver is configured to receive and convert the optical signals into digital signals. | 06-20-2013 |
20130158412 | TISSUE INTERFACE SYSTEMS FOR OPTICAL MEASUREMENT OF PHYSIOLOGICAL BLOOD PARAMETERS - Systems and methods for measuring a physiological parameter of tissue in a patient are provided herein. In a first example, tissue interface pad for applying optical signals to tissue of a patient is provided. The tissue interface pad includes a first surface configured to interface with the tissue of the patient and further includes a first guide channel disposed generally parallel to a second guide channel. The first guide channel is configured to route an input optical fiber to a first location and optically couple an end of the input optical fiber to the tissue at the first location. The second guide channel is configured to route an output optical fiber to a second location and optically couple an end of the output optical fiber to the tissue at the second location. | 06-20-2013 |
20130158372 | MEDICAL SENSOR FOR USE WITH HEADBAND - Medical sensors configured to provide enhanced patient comfort when worn over a period of time are provided. The medical sensors may include a first padding layer and a second padding layer disposed on either side of an emitter and a detector for measuring a physiological parameter of a patient. The medical sensors may also include an island padding layer secured to a patient-facing side of the second padding layer for reducing localized pressure points that may be caused by protrusions of the sensor. Additionally or alternatively, certain edges of the sensors may be rounded and/or stepped to reduce marking on the patient's tissue and to reduce strain and shear forces produced on the patient's tissue. Still further, certain embodiments provide enhanced light transmission between the emitter and detector of the sensors. | 06-20-2013 |
20130146063 | SHAPED EVACUATION PORT FOR A MULTI-LUMEN TRACHEAL TUBE - The present disclosure describes systems and methods that utilize a tracheal tube with a shaped evacuation port. An evacuation port coupled to a suction lumen may be shaped to reduce air channel formation within the suction lumen, which in turn may improve the suctioning force and efficiency. The shaped evacuation ports may be generally oval or may be shaped to minimize a height dimension while maintaining a suitable cross-sectional area. In particular embodiments, the shaped evacuation ports may have cross-sectional areas that correspond to a cross-sectional area of the suction lumen. | 06-13-2013 |
20130146055 | METHODS AND SYSTEMS FOR ADAPTIVE BASE FLOW - This disclosure describes systems and methods for providing novel adaptive base flow scheduling during ventilation of a patient to optimize the accuracy of estimated exhaled tidal volume. Further, this disclosure describes systems and methods for providing novel adaptive inspiratory trigger threshold scheduling during the novel adaptive base flow scheduling. | 06-13-2013 |
20130144148 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC MONITORING USING INDICATOR DILUTION - A patient monitoring system may provide photoacoustic sensing based on an indicator dilution to determine one or more physiological parameters of a subject. The system may detect an acoustic pressure signal, which may include one or more thermo-dilution responses, one or more hemo-dilution responses, or a combination thereof. For example, a thermo-dilution indicator and/or a hemo-dilution indicator may be used to determine one or more hemodynamic parameters. In a further example, an isotonic indicator and a hypertonic indicator may be used to determine one or more hemodynamic parameters of the subject. | 06-06-2013 |
20130144147 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC MONITORING USING INDICATOR DILUTION - A patient monitoring system may provide photoacoustic sensing based on an indicator dilution to determine one or more physiological parameters of a subject. The system may detect an acoustic pressure signal, which may include one or more thermo-dilution responses, one or more hemo-dilution responses, or a combination thereof. For example, a thermo-dilution indicator and/or a hemo-dilution indicator may be used to determine one or more hemodynamic parameters. In a further example, an isotonic indicator and a hypertonic indicator may be used to determine one or more hemodynamic parameters of the subject. | 06-06-2013 |
20130138002 | SYSTEMS AND METHODS FOR DETECTING ARRHYTHMIA FROM A PHYSIOLOGICAL SIGNAL - Arrhythmia may impact the determination of physiological information from a physiological signal. A patient monitoring system may detect the presence of arrhythmia based on changes in the physiological signal. Derived value data sets may be extracted from the physiological signal and calculations performed to generate arrhythmia features. The arrhythmia features may be used to generate an arrhythmia indicator that may indicate the presence of arrhythmia in the physiological signal. | 05-30-2013 |
20130137960 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC MONITORING USING INDICATOR DILUTION - A patient monitoring system may provide photoacoustic sensing based on an indicator dilution to determine one or more physiological parameters of a subject. The system may detect an acoustic pressure signal, which may include one or more thermo-dilution responses, one or more hemo-dilution responses, or a combination thereof, using one or more sensor units. The system may use multiple light sources and/or detectors to diagnose and/or improve signal to noise ratio, distinguish between arterial and venous signals, prevent under-sampling, and separate the effects of hemo-dilution and thermo-dilution. | 05-30-2013 |
20130137959 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC MONITORING USING INDICATOR DILUTION - A patient monitoring system may provide photoacoustic sensing based on an indicator dilution to determine one or more physiological parameters of a subject. The system may detect an acoustic pressure signal, which may include one or more thermo-dilution responses, one or more hemo-dilution responses, or a combination thereof, using one or more sensor units. The system may use multiple light sources and/or detectors to diagnose and/or improve signal to noise ratio, distinguish between arterial and venous signals, prevent under-sampling, and separate the effects of hemo-dilution and thermo-dilution. | 05-30-2013 |
20130137946 | MEDICAL DEVICE WITH CONDITIONAL POWER CONSUMPTION - Embodiments of the present disclosure relate to a system and method for reducing power consumption of a medical device based on one or more physiological parameters. For example, the medical device may be operated in a low power mode if a physiological parameter trend is above a certain threshold. In the low power mode, the processing power may be reduced relative to a high power mode. The low power mode may be associated with reduced processing and output rate. | 05-30-2013 |
20130137938 | SYSTEMS AND METHODS FOR DETERMINING DIFFERENTIAL PULSE TRANSIT TIME FROM THE PHASE DIFFERENCE OF TWO ANALOG PLETHYSMOGRAPHS - Systems and methods are provided for patient monitors which apply phase detection operations to analog signals to identify differential pulse transit time (DPTT). Photoplethysmograph (PPG) signals measured at two sensor sites may be processed by a phase detection system to identify phase information that allows the calculation of a DPTT. The phase detection system may process analog PPG signals in the analog domain to determine phase information. In some embodiments, the phase detection system may process optical oximetry sensor signals to determine phase information using, for example, interferometric methods. | 05-30-2013 |
20130134989 | CALIBRATION RESISTANCE EMULATOR - The present disclosure relates generally to patient monitoring systems and, more particularly, to a resistance emulator for patient monitors. In an embodiment, a resistance emulator includes a first plug configured to couple with a medical monitor. The medical monitor is configured to receive a calibration resistance value of a medical device sensor from a coded resistor. The resistance emulator further includes a second plug configured to couple with a medical device sensor. The medical device sensor is configured without the coded resistor. The resistance emulator also includes emulation circuitry configured to provide an emulated signal representative of the calibration resistance value to the medical monitor. | 05-30-2013 |
20130133644 | TRACHEAL TUBE WITH FACILITY TO VIEW INNER CANNULA - A tracheal tube assembly includes an outer cannula configured to be positioned in a patient airway and an inner cannula configured to be disposed inside the outer cannula. The tracheal tube assembly further includes a flange member secured about the outer cannula, and a connector coupled to a proximal end of the outer cannula. The connector is configured to provide a view of the inner cannula, and the inner cannula and the connector form a contiguous passageway for exchanging fluid with the patient airway in operation. | 05-30-2013 |
20130116519 | MAGNETIC ENHANCEMENT IN DETERMINATION OF PHYSIOLOGICAL BLOOD PARAMETERS - Systems and methods for measuring a physiological parameter of blood in a patient are provided herein. An example method includes establishing with a magnetic array, an first magnetic field along tissue of the patient inserted into the magnetic array and a second magnetic field perpendicular to the tissue, emitting optical signals into further tissue of the patient during at least a first alignment of the magnetic array around the tissue, detecting characteristics of the optical signals, and identifying a value of a physiological parameter based on at least the characteristics of the optical signals. | 05-09-2013 |
20130109949 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC SIGNAL PROCESSING | 05-02-2013 |
20130109948 | METHODS AND SYSTEMS FOR DETERMINING PHYSIOLOGICAL PARAMETERS USING TWO PHOTOACOUSTIC PEAKS | 05-02-2013 |
20130109947 | METHODS AND SYSTEMS FOR CONTINUOUS NON-INVASIVE BLOOD PRESSURE MEASUREMENT USING PHOTOACOUSTICS | 05-02-2013 |
20130109941 | METHODS AND SYSTEMS FOR PHOTOACOUSTIC SIGNAL PROCESSING | 05-02-2013 |
20130104896 | METHODS AND SYSTEMS FOR GATING USER INITIATED INCREASES IN OXYGEN CONCENTRATION DURING VENTILATION | 05-02-2013 |
20130104288 | HEADBAND FOR USE WITH MEDICAL SENSOR | 05-02-2013 |
20130092171 | MULTI-LUMEN TRACHEAL TUBE WITH PRESSURE DISTRIBUTION - The present disclosure describes systems and methods that utilize a tracheal tube with pressure distribution features. For certain patients, the vocal cords may form a seal with an inserted tracheal tube. A pressure distribution lumen may allow fluid communication between tracheal space above and below the vocal cords. This in turn may reduce the formation of a vacuum seal forming around a suction lumen evacuation port. Accordingly, the disclosed embodiments provide improved suctioning by distributing the pressure around the evacuation port and the space above the vocal cords. | 04-18-2013 |
20130085356 | SENSOR SYSTEM WITH PRESSURE APPLICATION - Embodiments of the present disclosure relate to sensors for applying pressure to a patient's tissue. According to certain embodiments, the sensors may include one or more deformable elements that hold the optical components of the sensor against the tissue with an appropriate amount of pressure. In additional embodiments, such sensors may include a rigid one-piece sensor body that incorporates a deformable element to facilitate fine-fitting of the sensor against the tissue. | 04-04-2013 |
20130081634 | TRACHEAL TUBE FLANGE MEMBER - Various embodiments of flange members and tracheostomy tube assemblies including such flange members are provided. An embodiment of a flange member includes a base portion adapted to receive a proximal end of a cannula, a first flange disposed on a first side of the base portion, and a second flange member disposed on a second side of the base portion opposite the first side. The first flange and the second flange are adapted to rest against a patient's neck to maintain the flange member outside of a patient's airway. The flange member also includes a biocompatible pad reversibly integrated with at least one of the base portion, the first flange, and the second flange. | 04-04-2013 |
20130079618 | TECHNIQUE FOR REMANUFACTURING A BIS SENSOR - Remanufactured BIS sensors and methods for remanufacturing used BIS sensors are provided. Such a remanufactured sensor may include certain components from a used medical sensor and certain new components. For example, a remanufactured BIS sensor may include a backing layer and at least first, second, and third electrodes disposed on the backing layer having a conductive ink. The first, second, and third electrodes are adapted to be in electrical contact with a patient to perform BIS measurements. A foam layer may be disposed on at least a portion of the backing layer, and an adhesive may be attached to the foam layer and is configured to secure the remanufactured BIS sensor to the patient. The first electrode, the second electrode, the third electrode, the backing layer, or a combination thereof, may be new and the foam layer, the adhesive, or a combination thereof, may be from a used medical sensor. | 03-28-2013 |
20130079611 | TECHNIQUE FOR REMANUFACTURING A MEDICAL SENSOR - Present embodiments include a remanufactured bandage-type medical sensor having an optical assembly with an emitter adapted to transmit one or more wavelengths of light and a photodetector adapted to receive the one or more wavelengths of light transmitted by the emitter. The sensor also includes a laminate assembly having an electrically conductive adhesive transfer tape (ECATT) layer disposed over the photodetector, and the ECATT layer is adapted to shield the photodetector from electromagnetic interference (EMI). A nonconductive layer supports the emitter, the photodetector, and the ECATT layer within the sensor. At least a portion of the optical assembly is from a used bandage-type medical sensor, and at least a portion of the laminate assembly is new. | 03-28-2013 |
20130079609 | SHIELDED CABLE FOR MEDICAL SENSOR - Present embodiments include a cable configured to transmit signals between a pulse oximetry sensor and a patient monitor. The cable includes a first set of conductors adapted to connect to an emitter of the pulse oximetry sensor, a second set of conductors adapted to connect to a photodetector of the pulse oximetry sensor, and a conductive jacketing surrounding only the second set of conductors and adapted to shield the second set of conductors from electromagnetic interference (EMI). The conductive jacketing includes a conductive filler disposed within a polymeric matrix. The cable also includes a nonconductive jacketing surrounding the conductive jacketing, the nonconductive jacketing being configured to electrically insulate the conductive jacketing. | 03-28-2013 |
20130077095 | FARADAY SHIELD INTEGRATED INTO SENSOR BANDAGE - Present embodiments include a bandage sensor having an electrically conductive adhesive transfer tape layer as a Faraday shield. The electrically conductive transfer tape layer may be used in lieu of a fully metallic Faraday shield. The present embodiments also include a sensor cable having one or more conductive polymer EMI/RFI shields in place of a fully metallic EMI/RFI shield. Methods for manufacturing and remanufacturing such sensors and cables are also disclosed. | 03-28-2013 |
20130074844 | USE OF MULTIPLE BREATH TYPES - The present disclosure describes a mode of ventilation that makes an automatic determination of an appropriate mandatory breath type in response to one or more patient based criteria. Specifically, the ventilator during the delivery a mandatory breath type determines whether predetermined ventilatory criteria have been met. Based on the determination, the ventilator may deliver one of any number of mandatory breath types. Further, the present disclosure also combines the advantages of a hybrid mode of ventilation with this automatic determination of an appropriate mandatory breath type in response to one or more patient based criteria. | 03-28-2013 |
20130060109 | TECHNIQUE FOR REMANUFACTURING A MEDICAL SENSOR - Remanufactured medical sensors and methods for remanufacturing used medical sensors are provided. Such a remanufactured sensor may include certain components from a used medical sensor and certain new components. For example, a remanufactured regional oximetry sensor may include a padding layer, an emitter and a pair of detectors, a flexible circuit coupled to the emitter and detectors, and a patient-contacting adhesive layer. The flexible circuit, the emitter, the first detector, the second detector, or any combination thereof, are from a used medical sensor, and the padding layer, the patient-contacting adhesive layer, or a combination thereof, are new. | 03-07-2013 |
20130060104 | FILTERED DETECTOR ARRAY FOR OPTICAL PATIENT SENSORS - The present embodiments relate generally to patient monitoring system and, more particularly, to optical patient monitoring systems. In an embodiment, a physiological sensor includes a broadband emitter configured to emit two or more wavelengths of light into the tissue of a patient. The sensor also includes a charge coupled device (CCD) or complementary metal-oxide semiconductor (CMOS) photodetector array comprising a plurality of photodetectors. Each photodetector in the photodetector array is configured to receive the light from the tissue of the patient and to produce a corresponding output signal. Additionally, the sensor also includes one or more filter layers disposed on the plurality of photodetectors. The filter layers are configured to only allow light of particular wavelengths, polarizations, or both, to be received by each of the plurality of photodetectors. | 03-07-2013 |
20130053717 | AUTOMATIC VENTILATOR CHALLENGE TO INDUCE SPONTANEOUS BREATHING EFFORTS - This disclosure describes systems and methods for configuring a ventilator for providing automatic, periodic ventilator adjustments to stimulate non-triggering patients to begin initiating spontaneous breathing efforts. Based on studies of respiration, a neural signal stimulating spontaneous breathing efforts is initiated when a patient's arterial partial pressure of carbon dioxide (PaCO | 02-28-2013 |
20130053636 | TRACHEAL TUBE WITH VISUALIZATION DEVICE AND INTEGRATED FLUSHING SYSTEM - The present disclosure describes systems and methods that utilize a multi-lumen tube with an integral visualization apparatus, such as a camera. The multi-lumen tracheal tube system may include a camera apparatus that is positioned to facilitate left or right bronchial intubation. In addition, the camera apparatus may be a unitary assembly that functions to hold and position the camera relative to the tube and provides an acceptable profile for comfortable intubation. The camera apparatus may include additional components, such as integral light sources and flushing or cleaning devices to remove any buildup from the camera or optical components. | 02-28-2013 |
20130035569 | METHOD AND APPARATUS FOR HEMOMETRY - The present invention pertains to a method and apparatus for hemometry in humans. Pressure is applied proximal to a target area in human tissue. A modulated optical signal based on a digital code sequence is transmitted to the target area. A temporal transfer characteristic is derived from the modulated optical signal. Concentration of an analyte is determined based on the temporal transfer characteristic. | 02-07-2013 |
20130035562 | Reflectance and/or Transmissive Pulse Oximeter - According to various embodiments, a medical sensor assembly may be configured to switch between transmission and reflectance mode. Such sensors may include multiple optical sensing components that may be activated or silent, depending on the mode in use. A practitioner may switch between modes based on the particular situation of the patient or based on the signal quality. | 02-07-2013 |
20130030267 | MULTI-PURPOSE SENSOR SYSTEM - Embodiments of the present disclosure relate to multi-purpose sensors for monitoring a plurality of physiological parameters. According to certain embodiments, the multi-purpose sensors may include optical elements for determining oxygen saturation and regional saturation. In additional embodiments, such sensor may include multiple electrodes that are configured for bispectral index monitoring. In particular embodiments, portions of the multi-purpose sensors may be removed and discarded when no longer needed. | 01-31-2013 |
20130027205 | AUTOMATIC CONFIGURATION PROTOCOL FOR A PATIENT MONITORING NETWORK - A patient monitoring network may include patient monitoring units including patient monitors and monitoring stations. A patient monitor may be part of a patient monitoring system including devices for monitoring physiological activity of a patient and the patient monitor. A monitoring station may include a display and user interface to allow for monitoring of one or more patient monitors. The patient monitoring units may be connected to a network. A broadcast communication may be used by a patient monitoring unit to identify an address of other patient monitoring units. Patient monitoring units may then engage in addressed communications to allow for the display of information from one or more patient monitors at one or more monitoring stations. | 01-31-2013 |
20130025602 | TRACHEAL TUBE POSITIONING DEVICES AND METHODS - Various embodiments of tracheal tube assemblies disclosed herein may include a tubular body having an open distal end for ventilating a patient and a cuff disposed around the tubular body above the open distal end. The cuff may be adapted to be inflated to seal the cuff against a wall of a trachea of the patient. The cuff may include a first portion that spaces the tubular body a first distance from the tracheal wall when inflated and a second portion that spaces the tubular body a second distance from the tracheal wall when inflated. The second distance may be greater than the first distance. | 01-31-2013 |
20130025597 | METHODS AND SYSTEMS FOR MONITORING A VENTILATED PATIENT WITH AN OXIMETER - This disclosure describes systems and methods for monitoring the ventilation of a patient being ventilated by a medical ventilator. The disclosure describes a novel approach for triggering the delivery of a breath to account for cardiogenic artifacts. The disclosure further describes a novel approach for calculating exhaled spirometry to eliminate the effect of cardiogenic artifacts. | 01-31-2013 |
20130025596 | METHODS AND SYSTEMS FOR MODEL-BASED TRANSFORMED PROPORTIONAL ASSIST VENTILATION - This disclosure describes systems and methods for providing a model-based transformed proportional assist breath type during ventilation of a patient. The disclosure describes a novel breath type that delivers a target pressure calculated based on a predetermined trajectory and a support setting to a triggering patient. | 01-31-2013 |
20130024129 | DETECTING CHEMICAL COMPONENTS FROM SPECTROSCOPIC OBSERVATIONS - Embodiments disclosed herein may include methods and systems capable of estimating the underlying concentrations of chromophores in a sample. The photon scattering and absorption model may be based on Laplace and stable distributions, which may reveal that measurements in diffuse reflectance may follow a Beer-Lambert and Kohlrausch-Williams-Watts (KWW) product. This Beer-Lambert portion of the product may dominate in high absorption sample areas, while the KWW portion of the product may dominate in low absorption sample areas. | 01-24-2013 |
20130023749 | FORCE REGULATING DEVICE APPLICATORS - Disclosed herein are apparatus and techniques for applying a device to a subject. Such apparatus and techniques may provide feedback to an operator and/or regulate the force used to apply the device, yielding an improved result. Particularly useful embodiments include apparatus and techniques for applying a medical device, such as a skin surface electrode or microneedle array, to a patient's tissue. | 01-24-2013 |
20130023748 | DEVICE WITH ENCAPSULATED GEL - Apparatus and techniques are provided for interfacing a device with a surface. The apparatus and techniques provide gel encapsulation and isolation mechanisms to extend the shelf-life of the preparation devices, allow for the use of more effective materials, and improve the quality of the contact between a device and an application surface. Particular embodiments of these apparatus and techniques suitable for use in medical contexts are also provided. | 01-24-2013 |
20130008451 | ENDOTRACHEAL CUFF AND TECHNIQUE FOR USING THE SAME - An inflatable balloon cuff may be adapted to seal a patient's trachea when associated with an endotracheal tube. Configurations of these cuffs that include tapered regions with certain characteristics, such as cuff wall diameter and thickness, may provide improved sealing of the trachea. | 01-10-2013 |
20130008443 | SAFE STANDBY MODE FOR VENTILATOR - A ventilator with a safe standby mode is provided. The safe standby mode allows a user to disconnect a patient from the ventilator, without the ventilator generating alarms and while maintaining previously entered ventilation parameters. In addition, while in the safe standby mode, a patient connection status is monitored, and a ventilation mode is entered automatically if the ventilator determines that a patient is connected to the ventilator while the ventilator is in the safe standby mode. | 01-10-2013 |
20130006134 | METHODS AND SYSTEMS FOR MONITORING VOLUMETRIC CARBON DIOXIDE - This disclosure describes novel systems and methods for monitoring volumetric CO | 01-03-2013 |
20130006133 | METHODS AND SYSTEMS FOR MONITORING VOLUMETRIC CARBON DIOXIDE - This disclosure describes novel systems and methods for monitoring volumetric CO | 01-03-2013 |
20130006129 | PATIENT MONITORING SYSTEMS WITH GOAL INDICATORS - Embodiments of the present disclosure relate to patient monitors designed to display goal indicators showing progress toward achieving patient monitoring goals. The goal indicators may be displayed on a main monitoring screen of the patient monitors, allowing caretakers to easily evaluate how effective they have been in managing the patient's condition. According to certain embodiments, the goal indicators may display a numerical value indicating the percentage of time that a physiological parameter, such as SpO | 01-03-2013 |
20130006075 | PHOTOPLETHYSMOGRAPHY FOR DETERMINING VENTILATION WEANING READINESS - Embodiments of the present disclosure relate to a system and method for determining a likelihood of successful ventilator weaning for a patient undergoing mechanical or assisted ventilation. Specifically, embodiments provided herein include methods and systems for determining or predicting weaning readiness in a patient based on physiological parameters determined via photoplethysmography. | 01-03-2013 |
20130000650 | ENDOTRACHEAL CUFF AND TECHNIQUE FOR USING THE SAME - An inflatable balloon cuff may be adapted to seal a patient's trachea when associated with an endotracheal tube. Configurations of these cuffs that include tapered regions with certain characteristics, such as angle of taper, cuff diameter, and cuff wall thickness, may provide improved sealing of the trachea. | 01-03-2013 |
20130000649 | TRACHEAL TUBE WITH CONTROLLED-PROFILE CUFF - The present disclosure describes systems and methods that utilize a tracheal tube with a reduced profile. An inflatable balloon cuff may be positioned within a recessed portion of an outer wall of the tracheal tube to reduce the overall profile of the tracheal tube. In this manner, protrusion of the inflatable balloon cuff from the tube is minimized, which protects the cuff from damage (e.g., snagging) and eases intubation. In addition, in certain embodiments, the recessed portion may change the outer wall diameter of the tube wall without affecting the inner wall diameter so that the work of breathing for the patient is not increased. | 01-03-2013 |
20130000644 | SYSTEMS AND METHODS FOR PROVIDING VENTILATION BASED ON PATIENT NEED - A ventilation system includes a controller and an alarm module in communication with the controller. The alarm module includes an alarm and an alarm emitter indicating activation of the alarm, wherein the alarm may be one or more of the following alarms: low pressure, low volume, low respiration rate, low minute volume, disconnect condition, and apnea. When the controller is in a first mode setting, the alarm emitter is activated in response to a triggering event, and when the controller is in a second mode setting, the alarm emitter is not activated in response to the triggering event. The ventilation system may include a breathing circuit, an airflow generator for delivering a ventilation airflow to the breathing circuit, and a sensor for sensing an increase in at least one of an air flow or an air pressure within the breathing circuit, thus triggering airflow. | 01-03-2013 |
20130000635 | TRACHEAL STOMA DILATION APPARATUS AND METHOD OF MANUFACTURE - A tracheal dilator system and method of manufacture are provided, suitable for dilating a passageway into a patient airway. In one embodiment, a tracheal tube is provided. The tracheal tube includes a dilator retrieval tip disposed on a distal end of a tracheal tube cannula. The dilator retrieval tip is configured to retrieve a tracheal dilator configured to enter through the distal end of the tracheal tube and exit through a proximal end of the tracheal tube. | 01-03-2013 |
20120330565 | SYSTEM AND METHOD FOR EVALUATING PHYSIOLOGICAL PARAMETER DATA - Embodiments disclosed herein may include systems and methods for evaluating physiological parameter data. Embodiments of methods may include monitoring a patient to produce a signal comprising a sequence of numerical values for a physiological parameter over a time period, calculating an index from the signal, comparing the index to a reported index, and if the index is greater than the reported index, setting the reported index to the value of the index. Embodiments of methods may include calculating a modulation of the signal, comparing the modulation to a previous valise of the modulation to identity a trend in the modulation and if the trend corresponds to an undesirable condition, using a first function, to increase the reported index. Embodiments of methods may include providing an indication of a physiological status based on the reported index. | 12-27-2012 |
20120330139 | MEDICAL DEVICE AND TECHNIQUE FOR USING THE SAME - According to various embodiments, a tracheal tube may employ optical sensing techniques for determining a distance between the inserted tube and an anatomical structure, such as a carina. The distance information may provide an indication as to whether or not the tracheal tube is properly placed within the trachea. The optical techniques may include backscattered intensity measurements. | 12-27-2012 |
20120323109 | Photon Measurement Method and Apparatus - A system and method for measuring photons utilizing a low-power light source modulated with a code sequence to interrogate a sample of interest. Preferably a portion of the scattered light from the sample is detected by a photo-detector. A correlation of the photo-detector signal and the code sequence produces an estimate of the distribution of flight times for photons traveling from the source to the detector. | 12-20-2012 |
20120323095 | METHOD FOR DETECTION OF ABERRANT TISSUE SPECTRA - A method is provided for determining contact of a sensor with a patient's tissue. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining if the sensor is in contact with the patient's tissue based on the comparison. In addition, a method is provided for determining the amount of light shunting during operation of the sensor. The method comprises comparing the intensity of detected light at a first wavelength to a threshold, wherein the first wavelength is not used to determine a physiological characteristic of the patient, and determining the amount of light shunting based on the comparison. | 12-20-2012 |
20120323086 | ALARM SENSITIVITY CONTROL FOR PATIENT MONITORS - Physical monitoring systems are disclosed which may allow for alarm sensitivity adjustment. A user may indicate an alarm sensitivity of a patient monitoring system to a physiological parameter, signal metric, operating condition metric, or other parameter or metric. The patient monitoring system may configure one or more alarm settings based on the indicated alarm sensitivity. Low sensitivity may reduce the probable occurrence or severity of alarm activations, while high sensitivity may increase the probable occurrence or severity of alarm activations. | 12-20-2012 |
20120316410 | CANCELLATION OF LIGHT SHUNTING - There is provided a system and method for canceling shunted light. The method includes transmitting electromagnetic radiation at tissue of interest and generating a signal representative of detected electromagnetic radiation. A portion of the generated signal representing shunted light is canceled from the generated signal and the remaining portion of the generated signal is used to compute physiological parameters. | 12-13-2012 |
20120311219 | Patient Monitoring Platform Interface - Physical monitoring systems are disclosed which may include a platform interface between a platform device and a monitoring module. The platform interface may allow physiological information from a patient such as sensor signal data, physiological trend data, other suitable data, or combinations thereof to be communicated from the monitoring module to the platform device. The platform interface may include a connector with pins configured to receive UART communications, transmit UART communications, communicate diagnostic information, be coupled to a ground, be coupled to a serial clock, receive serial data, transmit serial data, be coupled to a regulated power supply, be coupled to an unregulated power supply, communicate using USB standard, communicate using any other suitable standards, perform any other suitable functions, or any combinations thereof. The monitoring module may connect directly to the platform device, or a wired cable with suitable connectors may be used to electrically couple the monitoring module to the platform device. | 12-06-2012 |
20120310062 | PHOTON DENSITY WAVE BASED DETERMINATION OF PHYSIOLOGICAL BLOOD PARAMETERS - A method for measuring a physiological parameter of blood in a patient is presented. The method includes emitting light from a modulated light source into tissue of the patient to generate a photon density wave in the tissue, detecting the photon density wave during pulsatile perturbation of the tissue, and processing an amplitude and phase of the photon density wave over the pulsatile perturbation to determine a value of the physiological parameter. | 12-06-2012 |
20120310060 | METHOD OF ANALYZING PHOTON DENSITY WAVES IN A MEDICAL MONITOR - A monitoring system may include an emission feature capable of emitting light into tissue, a modulator capable of modulating the emitter at a modulation frequency, e.g., in a range of about 10 MHz to 3.0 GHz, to generate resolvable photon density waves, a detection feature capable of detecting photons of the photon density waves after passage through the tissue, and a processor capable of using phase and amplitude differences of the photon density wave signal relative to a reference to determine one or more physiological parameters. The phase and amplitude differences may be much lower frequency that the modulation rate. Accordingly, these differences may be masked by signal artifacts. Provided herein are signal conditioning techniques that may improve the signal to noise ratio of photon density wave signals and yield a more robust phase and amplitude signal. | 12-06-2012 |
20120310059 | Clinical Acceptance Tool - Provided herein are methods and apparatuses for facilitating clinical acceptance of patient monitoring features. These methods may be used in conjunction with a computer that includes software for viewing the type of display associated with the monitoring feature. The clinical acceptance systems as provided herein may display a new or experimental monitoring feature along with a benchmark feature that a clinician is familiar with. In certain embodiments, the viewing tool may be isolated from the calculation tools so that the computer may include stored files that are in a format ready for display. | 12-06-2012 |
20120310058 | PHOTON DENSITY WAVE BASED DETERMINATION OF PHYSIOLOGICAL BLOOD PARAMETERS - A system for measuring a physiological parameter of blood in a patient is presented. The system includes a transmission module configured to emit a plurality of photon density waves into tissue of the patient from a plurality of modulated light sources. The system also includes a receiver module configured to detect characteristics of the plurality of photon density waves. The system also includes a processing module configured to identify characteristics of a pulsatile perturbation of the tissue based on the characteristics of the plurality of photon density waves, and identify a value of the physiological parameter based on at least the characteristics of the pulsatile perturbation of the tissue and the characteristics of the plurality of photon density waves. | 12-06-2012 |
20120304997 | LEAK-COMPENSTATED PROPORTIONAL ASSIST VENTILATION - This disclosure describes systems and methods for compensating for leakage when during delivery of gas from a medical ventilator in a proportional assist mode to a patient. The technology described herein includes systems and methods to compensate the delivery of PA ventilation for leakage in the patient circuit by using leak-compensated lung flows as well as leak-compensated respiratory mechanics parameters (lung compliance and lung resistance) estimated in a manner that compensates for elastic and inelastic leaks from the ventilation system. | 12-06-2012 |
20120304995 | Previous Set Up Mode Parameter Retention - The present application describes a previous mode button that allows a clinician to select any previously administered ventilation mode for a patient such that the previously input ventilation parameters for the selected ventilation mode will be used during ventilation. Upon receiving the selection of the previous mode button, a first stored previous mode and first ventilation parameters associated with the first stored previous mode are displayed. A determination is then made as to whether the displayed first stored previous mode is an appropriate mode. If the displayed first stored previous mode is an appropriate mode, ventilation is administered using the first stored previous mode and first ventilation parameters. If a determination is made that the first stored previous mode is not appropriate, a second stored previous mode is retrieved and displayed. | 12-06-2012 |
20120304984 | REVERSE TRACHEAL STOMA DILATION METHOD AND APPARATUS - A reverse dilator system and method are provided, suitable for dilating a passageway into a patient airway. In one embodiment, a tracheal intubation system is provided. The tracheal intubation system includes a reverse dilator. The reverse dilator includes a shaft and a resizable portion disposed on a distal portion of the shaft. The reverse dilator is configured to dilate a tracheal passageway leading into an airway from inside the airway. | 12-06-2012 |
20120302833 | ILLUMINATION SYSTEMS AND DEVICES FOR TRACHEAL TUBES - Various embodiments of an intubation system include a tracheal tube and an illumination assembly that is removably couplable to a tubular body of the tracheal tube. The tracheal tube may be a double lumen tracheal tube having a first cuff that is adapted to be inflated to seal against the walls of a patient's trachea and a second cuff that is adapted to be inflated to seal against the walls of the patient's bronchial stem. The illumination assembly may have one or more illumination devices that are adapted to produce light within the patient's trachea, the patient's bronchial stem, or both when the illumination assembly is coupled to the tubular body. | 11-29-2012 |
20120298111 | DUAL-LUMEN TRACHEAL TUBE WITH ASSEMBLY PORTION - The present disclosure describes systems and methods having a dual-lumen tube with an assembly end. The assembly end may be molded and coupled to an extruded portion of the tube to form a complete dual-lumen tube. The assembly end may form the distal portion of the dual-lumen tube, which may simplify the manufacturing process by eliminating cutting and shaping steps involved in forming the distal ends of the ventilation lumens. The assembly end may be molded or otherwise formed so that the distal portion is not cut to length. In addition, the assembly end may include addition functionality, such as a camera apparatus or one or more sensors. | 11-29-2012 |
20120283555 | MULTIPLE CHANNEL TRACHEAL TUBE PLACEMENT DEVICE AND TECHNIQUE FOR USING THE SAME - According to various embodiments, a tracheal tube may employ sensing techniques for determining a distance between the inserted tube and an anatomical structure such as a carina. The distance information may provide an indication as to whether or not the tracheal tube is properly placed within the trachea. Because a tracheal tube may rotate within the trachea, the sensing information may be gathered from multiple locations on the tracheal tube for a rotation-independent measurement technique. | 11-08-2012 |
20120283533 | ADJUSTING PARAMETERS USED IN PULSE OXIMETRY ANALYSIS - Adjusting a pulse qualification criterion includes receiving a signal representing a plurality of pulses, where the signal is generated in response to detecting light scattered from blood perfused tissue. A characteristic is determined A pulse qualification criterion used for qualifying a pulse is adjusted in accordance with the characteristic. The pulses are evaluated according to the pulse qualification criterion. | 11-08-2012 |
20120279501 | VENTILATOR BREATH DISPLAY AND GRAPHIC USER INTERFACE - The invention is directed to a ventilation control system for controlling the ventilation of a patient. The ventilation control system utilizes a user-friendly user interface for the display of patient data and ventilator status. The user interface includes a graphic representation of a breath cycle that displays the breath cycle currently being ventilated, and is also responsive to changes in ventilation settings to assist the user in evaluation the effect of those changes on the ventilator strategy before the changes are implemented. | 11-08-2012 |
20120277595 | ADJUSTING PARAMETERS USED IN PULSE OXIMETRY ANALYSIS - Adjusting a pulse qualification criterion includes receiving a signal representing a plurality of pulses, where the signal is generated in response to detecting light scattered from blood perfused tissue. A characteristic is determined A pulse qualification criterion used for qualifying a pulse is adjusted in accordance with the characteristic. The pulses are evaluated according to the pulse qualification criterion. | 11-01-2012 |
20120277561 | SYSTEM AND METHOD FOR DETECTION OF VENOUS PULSATION - In accordance with an embodiment of the present technique, there is provided methods and systems for detecting the presence of venous pulsation by adjusting the sensitivity of a detection algorithm based on a sensor characteristic and/or notifying a caregiver of the presence of venous pulsation by ceasing display of physiological parameters. An exemplary embodiment includes receiving one or more signals from a sensor, the one or more signals corresponding to absorption of light in a patient's tissue; calculating one or more physiological parameters of the patient based on the one or more signals; displaying the patient's physiological parameters; enabling detection of venous pulsation with variable sensitivity based on a location of the sensor; and suspending or terminating the display of the one or more of the patient's physiological parameters when venous pulsation is detected. | 11-01-2012 |
20120277560 | MEDICAL SENSOR FOR REDUCING MOTION ARTIFACTS AND TECHNIQUE FOR USING THE SAME - A sensor may be adapted to reduce motion artifacts by damping the effects of outside forces and sensor motion. A sensor is provided with a motion damping structure adapted to reduce the effect of motion of a sensor emitter and/or detector. Further, a method of damping outside forces and sensor motion is also provided. | 11-01-2012 |
20120272962 | METHODS AND SYSTEMS FOR MANAGING A VENTILATOR PATIENT WITH A CAPNOMETER - This disclosure describes systems and methods for managing the ventilation of a patient being ventilated by a medical ventilator. The disclosure describes a novel approach of displaying integrated ventilator information with capnometer data. The disclosure further describes a novel approach for determining if the ventilator breathing circuit is occluded or disconnected. | 11-01-2012 |
20120272961 | METHODS AND SYSTEMS FOR EXHALATION CONTROL AND TRAJECTORY OPTIMIZATION - This disclosure describes systems and methods for controlling pressure and/or flow during exhalation. The disclosure describes novel exhalation modes for ventilating a patient. | 11-01-2012 |
20120272960 | Methods and Systems for Volume-Targeted Minimum Pressure-Control Ventilation - This disclosure describes systems and methods for providing a volume-targeted minimum pressure-control breath type during ventilation of a patient. The disclosure describes a novel breath type that allows an operator to input a tidal volume and receive some of the benefits of utilizing an airway pressure release ventilation (APRV) breath type in combination with some of the benefits of utilizing a volume-targeted-pressure-control (VC+) breath type. | 11-01-2012 |
20120271131 | MUCOSAL SENSOR FOR THE ASSESSMENT OF TISSUE AND BLOOD CONSTITUENTS AND TECHNIQUE FOR USING THE SAME - A sensor for physiological constituent detection may be adapted to include a mucoadhesive. A sensor is provided that is appropriate for use on mucosal tissue. The mucoadhesive provides a mechanism for holding the sensor on the mucous membrane in order to measure physiological constituent levels in the tissue and blood. | 10-25-2012 |
20120268285 | SYSTEMS AND METHODS FOR PROVIDING HAPTIC FEEDBACK IN A MEDICAL MONITOR - The present disclosure is directed towards systems and methods for providing haptic feedback in a medical monitor. The haptic feedback may be configurable. For example, haptic feedback may be associated with only a defined set of events occurring or may have different properties according to the event that triggers the haptic feedback to occur. | 10-25-2012 |
20120259235 | Systems and Methods for Monitoring Heart Rate and Blood Pressure Correlation - Systems and methods are provided for monitoring a correlation between heart rate and blood pressure in a patient. When a characteristic of the correlation exceeds a threshold, a patient status indicator signal is sent to a monitoring device. In some embodiments, the patient status indicator signal indicates a particular medical condition or alerts a care provider to a change in status. In some embodiments, the heart rate signal is used to improve a blood pressure estimate generated by a different signal. In some embodiments, the heart rate, blood pressure and correlation signals are used in a predictive mathematical model to estimate patient status or outcome. | 10-11-2012 |
20120259190 | DETECTION OF OXIMETRY SENSOR SITES BASED ON WAVEFORM CHARACTERISTICS - In accordance with an embodiment of the present technique, there is provided methods and systems for detecting the location of a sensor and determining calibration algorithms and/or coefficients for calculation of physiological parameters based on the detected location. An exemplary embodiment includes receiving a signal corresponding to absorption of at least one wavelength of light by a patient's tissue, generating a plethysmographic waveform from the signal, determining an identifying characteristic of the plethysmographic waveform, and determining a location of the sensor based on a comparison of the identifying characteristic with at least one defined criterion. | 10-11-2012 |
20120259173 | VISUALIZATION DEVICE AND HOLDER FOR USE WITH A TRACHEAL TUBE - The present disclosure describes systems and methods that utilize a tracheal tube with an integral visualization device, such as a camera. The tracheal tube system may include a camera apparatus or other visualization device that is associated with a lumen formed in the wall of the tube. In addition, the camera apparatus may be positioned within a holder associated with a distal end of the tracheal tube that functions to hold and position the optical components of the camera relative to the tube and provides an acceptable profile for comfortable intubation. Further, the camera apparatus and its associated holder may include additional components, such as integral light sources and flushing or cleaning devices to remove any buildup from the camera or optical components. | 10-11-2012 |
20120253163 | METHOD AND SYSTEM FOR POSITIONING A SENSOR - Embodiments of the present disclosure relate to sensor designs or shapes configured to facilitate placement of sensor electrodes and, thus, proper positioning of the sensors on patients. According to certain embodiments, a sensor may include a substrate that includes multiple electrodes, where a first electrode is configured to be placed on a patient's temple and a second electrode is configured to be placed on a patient's forehead directly above a patient's eyebrow. The sensor may include a particular shape and a fixed distance between the first and second electrodes to facilitate proper angling and positioning of the first and second electrodes as well as the other electrodes (e.g., third and fourth electrodes). Other embodiments may include a method for positioning the sensor on the patient, including a monitor with help screens. | 10-04-2012 |