Patent application number | Description | Published |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |