Class / Patent application number | Description | Number of patent applications / Date published |
600526000 | Blood output per beat or time interval | 29 |
20080255466 | Method for Determining Haemodynamic Parameters - A method for determining haemodynamic parameters from patient pressure signals wherein receiving patient pressure signals from a measurement receiver to which vessel pressures measured in the body of a patient are supplied; selecting and determining a patient pressure signal as reference pressure signal from the patient pressure signals sent from the measurement receiver; dividing the patient pressure signals and reference pressure signal into segments; examining these segments for artefacts with methods in the time range by using the first derivative with respect to time of the pressure signals wherein artefact-afflicted segments are discarded; determining the start and end of a heart beat by the reference pressure signal and using the non-discarded segments of the patient pressure signals for calculating haemodynamic parameters. | 10-16-2008 |
20080275354 | System and method for diverting flow to facilitate measurement of system parameters - A method and various devices are disclosed that facilitates the measurement of hemodynamic parameters by injection of an indicator in an indicator dilution technique using an extracorporeal circuit connected to a patient. Specifically, the invention deals with problems caused by the spike in pressure in an extracorporeal line that result from the injection of a bolus. The method and various devices provide for diversion of blood during an indictor injection process and then return of the diverted blood back into the system after the injection is completed. The variations of the invention use diversion lines, accommodating cases and other devices that are designed to accumulate blood displaced during injection and then returning the blood to the extracorporeal circuit after injection. | 11-06-2008 |
20090069705 | Thermo-Dilution Cardiac Output Measurement Simulator - The present invention includes machine-enabled methods of, and devices and systems for, simulating thermo-dilution cardiac output measurements based on ambient room temperature measurements via the injectate temperature sensor. | 03-12-2009 |
20090112113 | METHOD AND APPARATUS FOR DETERMINING EJECTION FRACTION - A method is provided for determining ejection fraction. The method includes: measuring a physiologic signal indicative of blood pressure; analyzing the physiologic signal at more than one time instance so as to extract information present in its temporal variations; and determining ejection fraction based in part on the extracted information | 04-30-2009 |
20090137917 | Central venous catheter assembly for measuring physiological data for cardiac output determination and method of determining cardiac output - The central venous sensor assembly comprises a catheter body with several proximal ports. The catheter portion placed in the vena cava superior is equipped with a proximal flux measurement unit, and the catheter portion placed in the vena cava inferior is equipped with a distal flux measurement unit. A first input channel supplies a measurement signal indicative of a flux vp to the evaluation unit from which the latter calculates a blood flow in the vena cava superior. Likewise, a second input channel supplies a measurement signal indicative of a flux vd to the evaluation unit from which the latter calculates a blood flow rate in the vena cava inferior. Due to continuity, the sum of the flow rates in the upper and lower central veins corresponds to the flow rate through the right heart and in the pulmonary artery and thus to cardiac output. | 05-28-2009 |
20100030095 | Pulse Acoustic Analysis System for the Diagnostic of Cardiovascular Disease - This invention provides a pulse acoustic analysis system for detecting disease. The present invention further provides a method for detecting a dynamic pressure change in a blood dynamic system in human. | 02-04-2010 |
20100049071 | Method and System for Non-Invasive Measurement of Cardiac Parameters - A method and system are presented for use in assessment of at least one cardiac parameter of an individual. An electrodes arrangement is applied to an individual's body, for applying an electrical field to the body and providing an electrical output indicative of a systolic impedance change and of a velocity of said change during a cardiac cycle. Also provided is additional data indicative of at least of the following conditions of the individual: a value of total peripheral resistance (TPR), a value of cardiac index (CI), and existence of the AHF condition. Data corresponding to these condition is analyzed to determine whether the TPR satisfies a first predetermined condition and/or the CI satisfies a predetermined second condition and/or whether the acute heart failure (AHF) condition is identified, to thereby use the data indicative of the measured electrical output and selectively calculate said at least one cardiac parameter based on either the systolic impedance change data or on said data of the velocity of the impedance change. | 02-25-2010 |
20100106037 | METHOD AND DEVICE FOR DETERMINING CARDIAC OUTPUT WITH CARBON DIOXIDE PARTIAL RE-BREATHING - A method and apparatus ( | 04-29-2010 |
20110009759 | NON INVASIVE ANALYSIS OF BODY SOUNDS - This method for analysing the sounds of body fluid flows comprises:—simultaneously acquiring ( | 01-13-2011 |
20110021938 | APPARATUS AND METHOD FOR INDICATING CARDIAC OUTPUT - An apparatus for indicating cardiac output comprises means for monitoring a patient's transthoracic impedance and generating a corresponding impedance signal, and signal processing means for (a) deriving a signal S | 01-27-2011 |
20110105931 | System for Determining Patient Heart related Parameters for use in Heart Imaging - A system uses integrated spatio-temporal analysis in X-ray angiography, for example, by using spatial information within each image frame and temporal information between image frames to provide robust and accurate estimation of stroke area and volume, two and three dimensional ejection fraction and to accommodate patient heart variation. A system determines patient heart related parameters for use in patient heart imaging examination. An image data processor processes data representing multiple cardiac images of a patient over multiple heart beat cycles of the patient to derive data representing a distribution curve of a heart section area over multiple heart beat cycle times and indicating heart section area change over a heart beat cycle. An area processor determines a heart section area in response to user command. Also a computation processor determines a heart function parameter in response to the determined heart section area and the indicated heart section area change. | 05-05-2011 |
20120029374 | SYSTEM AND METHOD FOR CHARACTERIZING CIRCULATORY BLOOD FLOW - A computer-implemented method for characterizing circulatory blood volume is disclosed. The method has the steps of acquiring a biological signal that emulates the arterial pulse wave from a sensor. Two derived parameters, circulatory stress, which reflects a harmonic of heart rate, and circulatory blood flow, which reflects the amplitude of the unprocessed biological signal, are extrapolated from the biological signal, and are each compared to a threshold value and assessed to determine an adequacy of circulatory blood volume. In embodiments, the assessment of circulatory blood volume is used to manage a patient's cardiovascular autoregulatory function or the adequacy of transfer of fluids to and from the circulatory system, with the ultimate goal of achieving a circulatory blood volume that adequately supplies the demands of the patient's tissues and organs. | 02-02-2012 |
20130102914 | METHOD AND APPARATUS FOR TRENDING A PHYSIOLOGICAL CARDIAC PARAMETER - The present invention relates to an implantable cardioverter-defibrillator or pacemaker whose standard circuitry is used to trend a physiological cardiac parameter using intra-cardiac impedance measurements. The trend information may be used to predict the onset of a sudden cardiac death (SCD) event. By being able to predict the onset of an SCD event, patients and their physicians may be forewarned of a life-threatening event allowing them to respond accordingly. The trend information may also be used to predict the efficacy of cardiac-related medications, monitor progress of congestive heart failure, detect the occurrence of myocardial infarction, or simply track changes in sympathetic tone. | 04-25-2013 |
20130138008 | SYSTEM AND METHOD FOR SYSTOLIC INTERVAL ANALYSIS - A system and method provide for systolic interval analysis. In an example, an implantable device measures a cardiac impedance signal. A transformation of the cardiac impedance interval is generated. The device also measures a heart sound signal. A time interval between a point on the transformed signal of the cardiac impedance signal and a point on the heart sound signal is calculated. | 05-30-2013 |
20130218038 | System for Non-invasive Cardiac Output Determination - A method determines cardiac output or stroke volume by receiving signal data representing multiple parameters of a patient concurrently acquired over a particular time period and comprising at least one of, (a) a parameter derived from an ECG waveform of the patient, (b) a parameter derived from a blood pressure signal of the patient, (c) a parameter derived from signal data representing oxygen content of blood of the patient and (d) a parameter derived from a patient cardiac impedance value. A selected parameter of the multiple concurrently acquired parameters is used in calculating a heart stroke volume of the patient comprising volume of blood transferred through the blood vessel in a heart cycle, in response to, a combination of a weighted summation of values of the selected parameter over the particular time period. Data representing the calculated heart stroke volume is provided to a destination device. | 08-22-2013 |
20130237875 | SYSTEM AND METHOD TO EVALUATE CARDIOVASCULAR HEALTH - Systems and methods are described herein to evaluate a candidate medication as it relates to a subject's cardiovascular health. A processing component is employed to measure a first value of one or more cardiovascular markers, via a computer, which are associated with a circulatory system of each subject that is to receive the candidate medication. The candidate medication is administered to each subject and a second value of one or more cardiovascular markers are measured subsequent to the administration as of the candidate medication. Continued testing of the candidate medication can be continued dependent upon the change in the one or more cardiovascular markers. | 09-12-2013 |
20130245481 | REAL TIME CLINICAL DECISION SUPPORT SYSTEM HAVING MEDICAL SYSTEMS AS DISPLAY ELEMENTS - A clinical decision support system for patient treatment that incorporates patient data to display information in readily identifiable icons for vital organs and medical systems, and in a useable, real-time, updated fashion that extracts data from the medical history, the current medical management, the current physiologic monitors, and associated medical systems to produce warnings and alerts to enable caregivers to be made aware of physiologic systems at risk. These data are not only presented, but also use real-time queries and calculations to enable caregivers to have the types of data that would traditionally assist them in patient care but only be available by reviewing the medical literature and/or doing retrospective individual calculations while providing patient care. | 09-19-2013 |
20130317378 | Assessment of Pulmonary Blood Flow and Systemic Blood Flow in a Single Ventricle Patient - A system and accompanying method is provided for assessing a ratio of pulmonary to systemic blood flow in patients with a single-ventricle physiology (SVP). A compound dilution curve is recorded in an arterial vessel downstream of the pulmonary artery. A first component of the compound dilution curve is identified, wherein the first component is attributable to the indicator after passing through the single ventricle heart and directly into the arterial vessel A second component of the compound dilution curve is identified, wherein the second component is attributable to the indicator after passing from the single ventricle heart to the lungs, through the single ventricle heart and then to the arterial vessel downstream of the pulmonary artery. Based on the identified components, the pulmonary flow and systemic flow are assessed as corresponding to the identified first component and second component of the compound dilution curve. | 11-28-2013 |
20130345584 | POSTURE-INDUCED CHANGES TO PHYSIOLOGICAL PARAMETERS - Methods and devices for analyzing posture-induced changes to physiological parameters of a patient (e.g., ejection time, heart rate, etc.) to provide an assessment of one or more conditions of the patient. | 12-26-2013 |
20140142451 | SYSTEM AND METHOD OF BALLISTOCARDIOGRAM-BASED PERSONAL AUTHENTICATION - A ballistocardiogram-based personal authentication method includes detecting ballistocardiogram training signals of persons to be registered, extracting training features from the detected ballistocardiogram training signals, generating training data for personal authentication based on the extracted training features, detecting ballistocardiogram authentication signals of persons to be authenticated, and comparing the ballistocardiogram authentication signals and the training data to determine whether or not to perform the personal authentication of the persons to be authenticated. Thereby, the personal authentication method can perform personal authentication according to feature of a ballistocardiogram of each individual. | 05-22-2014 |
20140187992 | SYSTEM AND METHOD FOR NON-INVASIVELY DETERMINING CARDIAC OUTPUT - A system for non-invasively determining cardiac output of a patient may include a physiological signal detection unit and a cardiac output determination module. The physiological signal detection unit may be configured to detect first and second physiological signals with respect to first and second locations of vasculature of the patient. The cardiac output determination module may be configured to receive the first and second physiological signals and calculate the cardiac output of the patient based, at least in part, on a phase difference between the first and second physiological signals. | 07-03-2014 |
20140243696 | SYSTEM AND METHOD FOR MONITORING CARDIAC OUTPUT WITH SUBSTANTIALLY IMPROVED ACCURACY AND PRECISION - A computerized method for monitoring cardiac output of a subject by a processor executing the method, the method comprising the steps of:
| 08-28-2014 |
20140249440 | BODY-WORN SYSTEM FOR CONTINUOUS, NONINVASIVE MEASUREMENT OF CARDIAC OUTPUT, STROKE VOLUME, CARDIAC POWER, AND BLOOD PRESSURE - The invention provides a system for measuring stroke volume (SV), cardiac output (CO), and cardiac power (CP) from a patient that features: 1) impedance sensor connected to at least two body-worn electrodes and including an impedance circuit that processes analog signals from the electrodes to measure an impedance signal (e.g. a TBEV waveform); 2) an ECG sensor connected to at least two chest-worn electrodes and including an ECG circuit that processes analog signals from the electrodes to measure and ECG signal; 3) an optical sensor connected to a body-worn optical probe and including an optical circuit that processes signals from the probe to measure at least one optical signal (e.g. a PPG waveform) from the patient; 4) a processing system, typically worn on the patient's wrist and connected through a wired interface to the optical sensor, and through either a wired or wireless interface to the TBEV and ECG sensors. | 09-04-2014 |
20140249441 | BODY-WORN SYSTEM FOR CONTINUOUS, NONINVASIVE MEASUREMENT OF CARDIAC OUTPUT, STROKE VOLUME, CARDIAC POWER, AND BLOOD PRESSURE - The invention provides a system for measuring stroke volume (SV), cardiac output (CO), and cardiac power (CP) from a patient that features: 1) an impedance sensor connected to at least two body-worn electrodes and including an impedance circuit that processes analog signals from the electrodes to measure an impedance signal (e.g. a TBEV waveform); 2) an ECG sensor connected to at least two chest-worn electrodes and including an ECG circuit that processes analog signals from the electrodes to measure and ECG signal; 3) an optical sensor connected to a body-worn optical probe and including an optical circuit that processes signals from the probe to measure at least one optical signal (e.g. a PPG waveform) from the patient; 4) a processing system, typically worn on the patient's wrist and connected through a wired interface to the optical sensor, and through either a wired or wireless interface to the TBEV and ECG sensors. The processing system analyzes the ECG, TBEV and optical signals to determine SV, and further analyzes SV and HR determined from an ECG sensor to determine CO. | 09-04-2014 |
20140249442 | BODY-WORN SYSTEM FOR CONTINUOUS, NONINVASIVE MEASUREMENT OF CARDIAC OUTPUT, STROKE VOLUME, CARDIAC POWER, AND BLOOD PRESSURE - The invention provides a system for measuring stroke volume (SV), cardiac output (CO), and cardiac power (CP) from a patient that features: 1) an impedance sensor connected to at least two body-worn electrodes and including an impedance circuit that processes analog signals from the electrodes to measure an impedance signal (e.g. a TBEV waveform); 2) an ECG sensor connected to at least two chest-worn electrodes and including an ECG circuit that processes analog signals from the electrodes to measure and ECG signal; 3) an optical sensor connected to a body-worn optical probe and including an optical circuit that processes signals from the probe to measure at least one optical signal (e.g. a PPG waveform) from the patient; 4) a processing system, typically worn on the patient's wrist and connected through a wired interface to the optical sensor, and through either a wired or wireless interface to the TBEV and ECG sensors. The processing system analyzes the ECG, TBEV and optical signals to determine SV, and further analyzes SV and HR determined from an ECG sensor to determine CO. | 09-04-2014 |
20140249443 | BODY-WORN SYSTEM FOR CONTINUOUS, NONINVASIVE MEASUREMENT OF CARDIAC OUTPUT, STROKE VOLUME, CARDIAC POWER, AND BLOOD PRESSURE - The invention provides a system for measuring stroke volume (SV), cardiac output (CO), and cardiac power (CP) from a patient that features: 1) an impedance sensor connected to at least two body-worn electrodes and including an impedance circuit that processes analog signals from the electrodes to measure an impedance signal (e.g. a TBEV waveform); 2) an ECG sensor connected to at least two chest-worn electrodes and including an ECG circuit that processes analog signals from the electrodes to measure and ECG signal; 3) an optical sensor connected to a body-worn optical probe and including an optical circuit that processes signals from the probe to measure at least one optical signal (e.g. a PPG waveform) from the patient; 4) a processing system, typically worn on the patient's wrist and connected through a wired interface to the optical sensor, and through either a wired or wireless interface to the TBEV and ECG sensors. The processing system analyzes the ECG, TBEV and optical signals to determine SV, and further analyzes SV and HR determined from an ECG sensor to determine CO. | 09-04-2014 |
20140296727 | Detection of Parameters in Cardiac Output Related Waveforms - Methods for detecting parameters in cardiac output related waveforms are described. The methods include methods for detecting individual heart beat cycles in a cardiac output related waveform, methods for detecting an error in an assigned starting point for an individual heart beat cycle in a cardiac output related waveform, methods for detecting a dichrotic notch for an individual heart beat cycle in a cardiac output related waveform, and methods for detecting an error in an assigned dichrotic notch for an individual heart beat cycle in a cardiac output related waveform. The identification of these parameters is important for a clinician as these parameters form the basis for the calculation of many other cardiac output related parameters. | 10-02-2014 |
20150112219 | INTRINSIC FREQUENCY ANALYSIS FOR LEFT VENTRICLE EJECTION FRACTION OR STROKE VOLUME DETERMINATION - Hardware and software methodology are described for non-invasively monitoring cardiac health. Hemodynamic waveforms variously acquired for a subject are analyzed to calculate or approximate intrinsic frequencies in two domains in two domains across the Dicrotic Notch. Together with associated notch timing, heart rate and blood pressure values left ventricle ejection fraction and/or stroke volume can be determination. | 04-23-2015 |
20150366468 | METHOD AND SYSTEM FOR MONITORING HEMODYNAMICS - A system for monitoring hemodynamics of a subject is disclosed. The system comprises: a signal generating system configured for providing at least an output electric signal and transmitting the output signal to an organ of the subject. The system also comprises a demodulation system configured for receiving an input electrical signal sensed from the organ responsively to the output electric signal, and for modulating the input signal using the output signal to provide an in-phase component and a quadrature component of the input signal. The system also comprises a processing system configured for monitoring the hemodynamics based on the in-phase and the quadrature components. | 12-24-2015 |