Class / Patent application number | Description | Number of patent applications / Date published |
600528000 | Detecting heart sound | 80 |
20080228095 | MEDICAL DEVICE - A multi-functional, hand-held medical device for measuring bodily functions and physiological parameters and for medical screening and diagnosis by dual sound detection. A multi-functional, hand-held medical device capable of accurate, automatic and instantaneous readings of data received from the patient's different bodily functions, enhances productivity of the user, allows for flexibility to adjust the distance between the patient and the user, and reduces the potential for transmission of infectious or contagious organisms between the patient and the user. A multi-functional, hand-held medical device that does not require the use of earpieces. A method for measuring bodily functions and physiological parameters and for medical screening and diagnosis by dual sound detection. An undoubtable useful tool not only for professionals but also for lay persons who may require frequent monitoring of vital sounds during home care assessments | 09-18-2008 |
20080262368 | HEART SOUND TRACKING SYSTEM AND METHOD - A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S1, S2, S3, and S4. Further, the first intra heart sound energy indication and the corresponding first intra heart sound time indication can correspond to the at least a portion of one of S1, S2, S3, and S4, respectively. | 10-23-2008 |
20080287819 | Method and System for High-Resolution Extraction of Quasi-Periodic Signals - A quasi-periodic signal with high signal-to-noise ratio containing signal features that exhibit poor temporal localization is processed to identify waveform temporal reference points that are used to provide the temporal reference points for extracting a representative waveform of a signal feature having high temporal localization in a second, related, quasi-periodic signal that has low signal-to-noise ratio. The resulting representative waveform exhibits much improved signal-to-noise ratio while preserving the temporal detail contained in the second, related, quasi-periodic signal. | 11-20-2008 |
20090012415 | SYSTEMS AND METHODS FOR ANALYSIS AND DISPLAY OF HEART SOUNDS - An auscultation system aids a clinician's diagnosis of the heart sounds by visually displaying at least an S | 01-08-2009 |
20090018461 | Method and apparatus for third heart sound detection - A cardiac rhythm management system includes a heart sound detector providing for detection of the third heart sounds (S | 01-15-2009 |
20090030334 | IMPLANTABLE HEART SOUND SENSOR WITH NOISE CANCELLATION - An implantable medical device system senses a first signal using a first acoustical sensor adapted to be operatively positioned in a first internal body location for sensing heart sounds in a patient. The system includes a second acoustical sensor adapted to be operatively positioned in a second internal body location for sensing sounds in the patient and generate a second signal that is less responsive to the heart sounds than the first acoustical signal. An implantable medical device including a housing and a processor enclosed in the housing receives the first signal and the second signal and generates a corrected first signal by canceling non-cardiac signals in the first signal using the second signal. | 01-29-2009 |
20090036789 | Extraction of heart sound of fetus from heart sound information that comprises plurality of mixtures of plurality of heart sounds of plurality of fetuses - A heart sound analyzer component of an apparatus in one example extracts a heart sound of a fetus from heart sound information that comprises a plurality of mixtures of a plurality of heart sounds of a plurality of fetuses. | 02-05-2009 |
20090099470 | METHOD AND DEVICE FOR AUTOMATICALLY DETERMINING HEART VALVE DAMAGE - A method and device for automatically detecting heart valve damage for four heart valves are proposed. The automatic determination method makes use of three or more heart tone microphones to simultaneously record heart tones of a patient's heart, and then separates the heart tones into four heart tone signals of the aortic valve, the pulmonary valve, the tricuspid valve and the mitral valve of the heart based on the timing characteristics and related techniques. Next, these four heart tone signals are digitally processed into sampling signals. Subsequently, the convolution method is used to process the sampling signals for producing system transfer functions. Finally, the system transfer functions and the reference database are compared to verify and determine damage for the four heart valves. The automatic determination method can judge heart valve damage to enhance the quality and convenience of medical treatment. | 04-16-2009 |
20090124916 | Acoustic physiological sensor - This document describes, among other things, a body having at least one acoustically detectable property that changes in response to a change in a physiological condition, such as ischemia. The body is positioned with respect to a desired tissue region. At least one acoustic transducer is used to acoustically detect a change in physical property. In one example, the body is pH sensitive and/or ion selective. A shape or dimension of the body changes in response to pH and/or ionic concentration changes resulting from a change in an ischemia state. An indication of the physiological condition is provided to a user. | 05-14-2009 |
20090177107 | DETECTION OF CORONARY ARTERY DISEASE USING AN ELECTRONIC STETHOSCOPE - The disclosure describes an electronic stethoscope system that automatically detects coronary artery disease in patients. The system uses an electronic stethoscope to record acoustic data from the fourth left intercostal space of a patient. A processing technique is then applied in order to filter the data and produce Fast Fourier Transform (FFT) data of magnitude versus frequency. If a bell curve is identified in the data between a predefined frequency range (e.g., 50 and 80 Hz) with a peak magnitude of greater than a predefined threshold (e.g., 2.5 units), the system automatically provides an output indicating that the patient is likely to have 50 to 99 percent stenosis of the coronary artery. If no bell curve is present, the patient may have artery stenosis of less than 50 percent. An interface module may be used to transfer diagnosis information to the stethoscope and data to a general purpose computer. This inexpensive and quick system may improve the chances for early detection and patient survival of coronary artery disease. | 07-09-2009 |
20090192401 | METHOD AND SYSTEM FOR HEART SOUND IDENTIFICATION - Methods, systems, and computer readable media are provided for identification of heart sound components in an audio signal of heart sounds. Time domain kurtosis and frequency domain kurtosis are used to distinguish peaks corresponding to the primary heart sounds, S | 07-30-2009 |
20090247889 | DETERMINING A PATIENT'S POSTURE FROM MECHANICAL VIBRATIONS OF THE HEART - A system for determining a patient's posture by monitoring heart sounds. The system comprises an implantable medical device that includes a sensor operable to produce an electrical signal representative of heart sounds, a sensor interface circuit coupled to the sensor to produce a heart sound signal, and a controller circuit coupled to the sensor interface circuit. The heart sounds are associated with mechanical activity of a patient's heart and the controller circuit is operable to detect a posture of the patient from a heart sound signal. | 10-01-2009 |
20090287106 | ISCHEMIA DETECTION USING A HEART SOUND SENSOR - A system comprising an implantable medical device (IMD) includes an implantable heart sound sensor to produce an electrical signal representative of at least one heart sound. The heart sound is associated with mechanical activity of a patient's heart. Additionally, the IMD includes a heart sound sensor interface circuit coupled to the heart sound sensor to produce a heart sound signal, and a signal analyzer circuit coupled to the heart sound sensor interface circuit. The signal analyzer circuit measures a baseline heart sound signal, and deems that an ischemic event has occurred using, among other things, a measured subsequent change in the heart sound signal from the established baseline heart sound signal. | 11-19-2009 |
20090312659 | MANAGING PRELOAD RESERVE BY TRACKING THE VENTRICULAR OPERATING POINT WITH HEART SOUNDS - A system and method for managing preload reserve and tracking the inotropic state of a patient's heart. The S1 heart sound is measured as a proxy for direct measurement of stroke volume. The S3 heart sound may be measured as a proxy for direct measurement of preload level. The S1-S3 pair yield a point on a Frank Starling type of curve, and reveal information regarding the patient's ventricular operating point and inotropic state. As an alternative, or in addition to, measurement of the S3 heart sound, the S4 heart sound may be measured or a direct pressure measurement may be made for the sake of determining the patient's preload level. The aforementioned measurements may be made by a cardiac rhythm management device, such as a pacemaker or implantable defibrillator. | 12-17-2009 |
20100049072 | METHOD AND APPARATUS FOR RETRIEVAL OF SIMILAR HEART SOUNDS FROM A DATABASE - The present invention exploits a visual rendering of heart sounds and models the morphological variations of audio envelopes through a constrained non-rigid translation transform. Similar heart sounds are then retrieved by recovering the corresponding alignment transform using a variant of shape-based dynamic time warping. | 02-25-2010 |
20100069768 | USE OF CARDIOHEMIC VIBRATION FOR PACING THERAPIES - An exemplary method includes receiving a signal from an intrathoracic vibration sensor, analyzing the signal for vibration associated with deceleration of blood flow into the left ventricle, based at least in part on the analyzing, deciding whether to call for adjustment to one or more parameters of a bi-ventricular pacing therapy. Other exemplary methods, devices, systems, etc., are also disclosed. | 03-18-2010 |
20100087746 | METHOD AND SYSTEM FOR ANALYZING BODY SOUNDS - The invention provides a method and system for analyzing body sounds from one or more body organs. An array of transducers is fixed to the body surface over the organs from which body sounds are to be recorded. Analysis of the recorded sound signals includes dividing each signal into one or more time intervals and calculating an average of the signal in each time interval. A difference signal is calculated for each interval, where the difference signal is the difference of the recorded signal in the interval and the interval average. An energy assessment signal is then calculated in each interval using the difference signal. In an embodiment, the energy assessment signal is a standard deviation signal. The subject matter may be used to record and analyze cardiovascular sounds for diagnosing abnormal cardiovascular function, or for calculating an ejection fraction. | 04-08-2010 |
20100094151 | Stethoscope Timer Attachment and Clip Holder Therefor - A stethoscope timer attachment and clip holder therefore comprising a timing device affixed to a tube of a stethoscope, and a holster to receive the timing device in an inverted position, wherein said holster is connected to a waist band of a pair of pants of a health care professional to carry the stethoscope thereon. | 04-15-2010 |
20100094152 | System and method for acoustic detection of coronary artery disease - A system and method for acoustic detection of coronary artery disease (CAD) are provided. The system includes a transducer for acoustically detecting heart signals of a patient and a computer system which executes detection software for processing the detected heart signals to identify the presence of CAD from the heart signals. The software allows for the automatic definition of a diastolic “window” of the acoustic signal for analysis, and automatically edits the sampled acoustic signal to eliminate unwanted artifacts and/or noise in the acoustic signal. The edited signal is then processed by a plurality of signal processing algorithms, including spectral analysis algorithms, time-frequency algorithms, global feature algorithms, kurtosis algorithms, mutual information algorithms, negenthropy algorithms, and principal component analysis algorithms, to generate a disease vector. The disease vector is then classified to determine whether CAD is present in the patient. Classification can be accomplished using linear discriminant analysis or a support vector machine. | 04-15-2010 |
20100099997 | METHOD FOR CORRECTION OF POSTURE DEPENDENCE ON HEART SOUNDS - A system to monitor heart sounds. The system comprises an implantable heart sound sensor configured to produce an electrical signal representative of at least one heart sound, an implantable posture sensor operable to produce an electrical signal representative of a patient's posture, and a controller circuit. The controller circuit is configured to determine a patient posture, measure at least one heart sound in correspondence with at least one corresponding patient posture, adjust the heart sound measurement by using the corresponding determined patient posture to reduce or remove variation in the heart sound measurement due to patient posture, detect a change in the adjusted heart sound measurement, and provide an indication of congestive heart failure to a user or an automated process in response to the detected change. | 04-22-2010 |
20100106038 | Method for Segmenting a Cardiovascular Signal - This invention describes a method for dividing a substantial cycli cardiovascular signal into segments by determining the characteristics of said cyclic signal, wherein each cycle in said signal comprises at least two characteristic segments and wherein the method comprises the steps o identifying segments in a cycle based on prior knowledge of said segment characteristics and the step of verifying said identified segments based on a number of statistical parameters obtained from prior knowledge relating to said cyclic signal. Furthermore, the invention describes a system adapted to perform the above-described method. | 04-29-2010 |
20100125218 | APPARATUS, METHOD, AND COMPUTER PROGRAM FOR DETECTING A PHYSIOLOGICAL MEASUREMENT FROM A PHYSIOLOGICAL SOUND SIGNAL - An apparatus is disclosed, comprising a speaker suitable to be applied at a user's ear and enabled to be supplied with an audio signal for rendering; a microphone arranged in vicinity of the speaker to acquire a sound signal from sounds present in the ear of the user; and a signal processor, wherein the signal processor is arranged to subtract the audio signal from the sound signal to provide a physiological sound signal, and the signal processor is further arranged to detect a physiological measurement from the physiological sound signal. A method and a computer program are also disclosed. | 05-20-2010 |
20100145210 | Multi parametric classification of cardiovascular sounds - The present application relates to a method for classifying a cardiovascular sound recorded from a living subject. The method comprises the step of extracting at least two signal parameters ( | 06-10-2010 |
20100160807 | Multi Parametric Classfication of Cardiovascular Sound - The present invention relates to a method for classifying a cardiovascular sound recorded from a living subject. The method comprises the steps of:
| 06-24-2010 |
20100198094 | WEARABLE SYSTEM FOR MONITORING PHYSIOLOGICAL SIGNALS - A wearable system for monitoring a plurality of physiological signals is provided. The wearable system includes at least one sensor producing the physiological signals associated with a patient. A processor unit receives the physiological signals from the at least one sensor. The processor unit analyzes the physiological signals to determine the occurrence of a triggered event and produces at least one output signal identifying the triggered event. A transmission unit receives the at least one output signal and prepares for transmission of the at least one output signal. | 08-05-2010 |
20100249629 | SEGMENTING A CARDIAC ACOUSTIC SIGNAL - The invention relates to segmentation of cardiac acoustic signals, such as the heart sound signal, based on statistical algorithms. A duration-dependent Hidden Markov Model is disclosed which models the shifting states of the heart, based on the cardiac acoustic signal and the time spent in the given states relating to physiological events, e.g. the various states of the heart during the heart beat cycle. | 09-30-2010 |
20110021939 | Method and Device for the Determination of Murmur Frequency Band - The present invention is related to a method for the determination of frequency band characteristic of a heart disease comprising the steps of: recording a first set of phonocardiograms from a first set of reference healthy patients, and a second set of phonocardiograms from a second set of patients suffering of said heart disease; calculating spectral energies of all possible frequency bands; comparing said spectral energies of all possible frequency bands for determining an optimized frequency band giving rise to the maximal distinction between spectral energies of the phonocardiograms from first and second set of phonocardiograms. | 01-27-2011 |
20110077543 | HEART SOUND TRACKING SYSTEM AND METHOD - A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S | 03-31-2011 |
20110098587 | Subcutaneous Cardiac Signal Discrimination Employing Non-Electrophysiologic Signal - A cardiac monitoring and/or stimulation system includes a housing coupled to a plurality of electrodes configured for subcutaneous non-intrathoracic sensing. A signal processor receives a plurality of composite signals associated with a plurality of sources, separates a signal from the plurality of composite signals, and identifies the separated signal as a cardiac signal using information derived from a non-electrophysiologic sensor, such as an accelerometer or acoustic transducer. The signal processor may iteratively correlate separated signals from the plurality of composite signals with a non-electrophysiologic sensor signal until the cardiac signal is identified. | 04-28-2011 |
20110098588 | METHOD AND APPARATUS FOR MONITORING OF DIASTOLIC HEMODYNAMICS - A cardiac rhythm management system provides for ambulatory monitoring of hemodynamic performance based on quantitative measurements of heart sound related parameters for diagnostic and therapeutic purposes. Monitoring of such heart sound related parameters allows the cardiac rhythm management system to determine a need for delivering a therapy and/or therapy parameter adjustments based on conditions of a heart. This monitoring also allows a physician to observe or assess the hemodynamic performance for diagnosing and making therapeutic decisions. Because the conditions of the heart may fluctuate and may deteriorate significantly between physician visits, the ambulatory monitoring, performed on a continuous or periodic basis, ensures a prompt response by the cardiac rhythm management system that may save a life, prevent hospitalization, or prevent further deterioration of the heart. | 04-28-2011 |
20110105932 | MULTI-AXIAL HEART SOUNDS AND MURMUR DETECTION FOR HEMODYNAMIC-CONDITION ASSESSMENT - A vector method for monitoring a subject's hemodynamic condition including (a) utilizing at least one, external or internal, anatomy-attached, three-axis accelerometer, collecting from the subject, during a selected cardiac cycle, related, three-orthogonal-axes accelerometer signal data, (b) following such collecting, processing collected signal data to obtain associated, signal vector, magnitude and directionality information, and (c) analyzing such obtained vector information for assessment of the subject's heart hemodynamic condition. ECG and signal time-frequency data is also collected and used in certain manners and implementations of the invention. | 05-05-2011 |
20110105933 | APPARATUS AND METHOD FOR OUTPUTTING HEART SOUNDS - An apparatus for outputting heart sounds includes an implantable system and an external system. The implantable system includes a sensor for generating sensed signals representing detected heart sounds, an interface circuit and a control circuit for receiving the sensed signals, generating data representing the heart sounds therefrom, and transmitting the data to the external system via the interface circuit. The external system includes an interface circuit for communicating with the implantable system, and a control circuit for receiving the data representing the heart sounds and for generating control signals that cause an output device to generate outputs representing the sounds. The implantable system may also include a sensor(s) for detecting cardiac electrical signals. In this case, outputs representing the cardiac electrical signals are also output. | 05-05-2011 |
20110112423 | INCREASING CPR EFFECTIVENESS USING PHONOCARDIOGRAM ANALYSIS - Embodiments of the invention include a system and methods for providing status information about resuscitation efforts of a person receiving chest compressions as part of Cardiopulmonary Resuscitation (CPR). A microphone generates a soundtrack by sampling sounds within or around the body of the person receiving CPR. The soundtrack is gated in one or more various ways to eliminate portions of the soundtrack, and analysis performed on the remaining portions. By evaluating the remaining portions of the soundtrack, the system can determine a cardiovascular effect of the compressions and provide status information to the rescuer about the determined cardiovascular effect. | 05-12-2011 |
20110208080 | CATEGORIZING AUTOMATICALLY GENERATED PHYSIOLOGICAL DATA BASED ON INDUSTRY GUIDELINES - Methods and systems for mapping a physiological signal into clinical guideline parameters are disclosed. A physiological signal having a characteristic that may represent an anomaly is received and mapped to a clinical guideline condition space. Probabilities are determined that the mapped signal with which the anomaly may be associated represents a first clinical guideline condition corresponding to a referral indication or a second clinical guideline condition corresponding to an absence of the referral indication. The determined probability is presented and a referral decision is made responsive to the determined probability that the anomaly is associated with the first clinical guideline condition. | 08-25-2011 |
20110213263 | METHOD FOR DETERMINING A HEARTBEAT RATE - A method for determining a heartbeat rate of a user from an acoustic heartbeat signal, a heartbeat rate measuring device, and a mobile device are described. | 09-01-2011 |
20110251508 | NOISE REJECTING ELECTRONIC STETHOSCOPE - An acoustic-electronic stethoscope that filters aberrant environmental background noise. The chest piece employs acoustic vents to inhibit resonant amplification of noise and contains a diaphragm design that focuses vibrational energy to a raised ring, which transfers and further focuses the energy to a piezoelectric polymer sensor with dual elements. The ensuing electrical signal is then preamplified with the low frequency sound, comprising predominantly background noise, filtered out. The stethoscope contains a binaural head set and output jack for down loading of data. Furthermore, areas normally subject to exposure and damage to water, such as the chest piece and headset, are water-tight. | 10-13-2011 |
20110257548 | METHOD AND SYSTEM FOR PROCESSING HEART SOUND SIGNALS - The invention provides a method of processing at least one heart sound signal, and the method comprises the step of: receiving ( | 10-20-2011 |
20110319782 | CARDIAC MECHANICAL VIBRATION MONITOR USING INFORMATION INDICATIVE OF LEAD MOTION - Systems and methods to monitor cardiac mechanical vibrations using information indicative of lead motion are described. In an example, a system including an implantable medical device can include an excitation circuit configured to provide a non-tissue stimulating, non-therapeutic electrical excitation signal to a portion of an implantable lead. A receiver circuit can be configured to obtain information indicative of a mechanical vibration of the implantable lead due at least in part to one or more of an impact of at least a portion of the heart to the implantable lead, or friction contact between the implantable lead and cardiac tissue. The system can include a processor circuit configured to determine one or more of a lead mechanical status, or information indicative of valvular activity using the information indicative of the mechanical vibration of the implantable lead. | 12-29-2011 |
20120010517 | STERILITY COVER FOR MEDICAL DEVICE SURFACE - An enclosure for a medical instrument including a pair of flexible sheets transmissive to a signal generated by a subject, the pair of sheets being arranged in parallel to each other, sealed along the sides and the top, and between the opposing lateral sides and the top and bottom ends along one or more seam lines. | 01-12-2012 |
20120089040 | ADAPTIVE SAMPLING OF HEART SOUNDS - A system and method to sense heart sounds with one or more implantable medical devices according to one or more signal processing parameters. The method alters one or more of the parameters as a function of one or more physiologic triggering events. The method then senses heart sounds with the one or more implantable medical devices according to at least the one or more altered signal processing parameters. | 04-12-2012 |
20120209131 | Method and System of a Cardio-acoustic Classification system for Screening, Diagnosis and Monitoring of Cardiovascular Conditions - A method and system are provided for a portable cardio-acoustic device. The device includes a display with user input, a sensor array to capture heart related vibrations from infrasound and acoustically transmitted audible sound, and a processor to extract salient features in accordance with human factor analysis, separate heart sounds as a function of sound patterns modeled from mechanical and physiological processes of the heart, classify heart sound patterns in accordance with biologically based signal processing models of the auditory cortex and cerebellum, and diagnose and monitor cardiovascular condition based on the classification of the heart sound patterns. | 08-16-2012 |
20120209132 | Method and System of an Acoustic Scene Analyzer for Body Sounds - A system and method for visualizing auditory scene analysis by way of a portable device is provided. In one embodiment, the method steps include capturing multiple sounds from a sensor array of microphones connected to the portable device, performing auditory scene analysis on detected body sounds in accordance with a psychoacoustic representation of body organ functions, and rendering to a display of the portable device a visualization of auditory scene auscultation of the body sounds, including user input functionality for separated sound source tracks, sound source identifier tracks, and sound source location trajectories. | 08-16-2012 |
20120232418 | SIGNAL EXTRACTING APPARATUS - A signal extracting apparatus is provided based on independent component analysis with reference for a single measured signal as a signal processing technique that allows stable and quick extraction of a target signal from single measured signal even in a high-noise environment with a high noise ratio against a target signal to be extracted. The signal extracting apparatus includes: a single-signal measuring unit to measure a measured signal as a single time-series signal containing a target signal obtained by measurement by a single channel; a reference signal creating unit ( | 09-13-2012 |
20120271186 | THIRD HEART SOUND ACTIVITY INDEX FOR HEART FAILURE MONITORING - A cardiac rhythm management system provides for the trending of a third heart sound (S3) index. The S3 index is a ratio, or an estimate of the ratio, of the number of S3 beats to the number of all heart heats, where the S3 beats are each a heart beat during which an occurrence of S3 is detected. An implantable sensor such as an accelerometer or a microphone senses an acoustic signal indicative heart sounds including S3. An S3 detector detects occurrences of S3 from the acoustic signal. A heart sound processing system trends the S3 index on a periodic basis to allow continuous monitoring of the S3 activity level, which is indicative of conditions related to heart failure. | 10-25-2012 |
20120289848 | METHOD AND SYSTEM FOR DISCRIMINATING HEART SOUND AND CARDIOPATHY - A method for discriminating heart sound is provided. The method comprises the following steps. A heart-sound signal is provided. A specific function calculation is performed on the heart-sound signal to generate a first calculation signal and suppress the noise of the heart-sound signal. The filtering signal is transformed to generate data for an image plots. The image plot corresponding to the data generated in the previous step is generated and compared with data of heart-sound plots and the comparison result is used for discriminating the heart sound. | 11-15-2012 |
20120289849 | SIGNAL PROCESSING APPARATUS AND METHOD FOR PHONOCARDIOGRAM SIGNAL - The present invention refers to a signal processing apparatus and its method of operation. The apparatus comprises a phonocardiogram interface adapted to receive a phonocardiogram signal captured according to a first set of capturing properties, a processor adapted to analyze the phonocardiogram signal to determine an analysis result for the phonocardiogram signal and a confidence value of the determined analysis result, and a flow control adapted to determine, whether a subsequent capture of the phonocardiogram signal according to a second set of capturing properties is likely to improve an accuracy of the determined analysis result. If applicable the flow control coordinates the subsequent capture of the phonocardiogram signal according to the second set of capturing properties The invention also refers to a corresponding computer program product. Also described is a signal processing apparatus comprising a user interface adapted to present the captured phonocardiogram signal to a user and to receive a user correction. Based on the user correction the phonocardiogram signal may be reanalyzed. | 11-15-2012 |
20120330174 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 12-27-2012 |
20130085407 | METHOD AND APPARATUS FOR THIRD HEART SOUND DETECTION - A cardiac rhythm management system includes a heart sound detector providing for detection of the third heart sounds (S | 04-04-2013 |
20130096451 | HEART SOUND TRACKING SYSTEM AND METHOD - A system and method provide heart sound tracking, including an input circuit, configured to receive heart sound information, and a heart sound recognition circuit. The heart sound recognition circuit can be coupled to the input circuit and can be configured to recognize, within a particular heart sound of a particular heart sound waveform, a first intra heart sound energy indication and a corresponding first intra heart sound time indication using the heart sound information from the particular heart sound waveform and the heart sound information from at least one other heart sound waveform. The particular heart sound can include at least a portion of one of S1, S2, S3, and S4. Further, the first intra heart sound energy indication and the corresponding first intra heart sound time indication can correspond to the at least a portion of one of S1, S2, S3, and S4, respectively. | 04-18-2013 |
20130131532 | Medical Diagonstic System - A medical diagnosis system includes recording at least one sound generated from a portion of an internal organ of a patient. Further, the medical diagnosis system includes comparing the at least one sound to a pre-recorded sound of a plurality of pre-recorded sounds for identifying a sound from the at least one sound. Thereafter, the medical diagnosis system includes storing the sound to a memory location based on the identification of the sound from the at least one sound. The sound is stored in form of an electronic file. The electronic file corresponding to the sound is capable of providing diagnostic inputs and a written display corresponding to the diagnosis for a diagnosis of the sound. | 05-23-2013 |
20130197382 | Physiological Parameter Estimation Using Phase-Locked Loop - A method and device for physiological parameter estimation, such as heart rate estimation, use a phase-locked loop to dynamically track a dominant frequency of an acoustic signal within a frequency band for the physiological parameter and estimate the physiological parameter using the dominant frequency. Because the phase-locked loop starts searching for the current dominant frequency near the most recently identified dominant frequency, the method and device rapidly incorporate slow changes in the dominant frequency that likely reflect real changes in the monitored physiological parameter while being slow to incorporate rapid changes in the dominant frequency that are likely caused by large noise. The hysteresis in phase-locked loop tracking allows the method and device to avoid physiological parameter estimation error induced by short-term large noise and quickly reacquire the dominant frequency once short-term large noise abates. | 08-01-2013 |
20130211273 | METHOD AND APPARATUS FOR HEART RATE MEASUREMENT - The present invention provides a method for heart rate measurement, comprising the steps of: receiving a current heart sound signal from a channel; processing the current heart sound signal to be a pre-processed heart sound signal; receiving a template signal of a template database obtained independently from the current heart sound signal; and calculating a conformity between the pre-processed heart sound signal and the template signal to obtain a heart rate signal representing the pre-processed heart sound signal. | 08-15-2013 |
20130226019 | SYSTEM AND METHOD FOR CLASSIFYING A HEART SOUND - A method and system for electronically classifying a pre-processed heart sound signal of a patient as functional (normal) or pathological is provided. The pre-processed patient heart sound signal is segmentised and features are extracted therefrom ( | 08-29-2013 |
20130261484 | SYSTEM, STETHOSCOPE AND METHOD FOR INDICATING RISK OF CORONARY ARTERY DISEASE - A system for detection of frequency power for diagnosing coronary artery disease (CAD), comprising: an acoustic sensor to be placed on the chest of a patient to generate acoustic signals S | 10-03-2013 |
20130289430 | METHOD AND APPARATUS FOR CARDIAC FUNCTION MONITORING - An implantable medical device that includes a first elongated lead body having an outer surface and an opening along the outer surface, a sensor positioned along the lead body and configured to receive acoustic signals through the opening of the first lead body and generate an electrical signal representative of sounds produced at a targeted location along a patient's cardiovascular system. A therapy delivery module is capable of delivering a cardiac therapy via predetermined electrodes of a plurality of electrodes, and a processor is configured to detect a cardiac event in response to the sensed cardiac electrical signals, determine a plurality of time intervals between the electrical signals and acoustic signals, determine a correlation between the electrical signals and the acoustic signals, and control the therapy delivery module to deliver therapy in response to the determined correlation. | 10-31-2013 |
20140012149 | WIRELESS STETHOSCOPE AND METHOD OF USE THEREOF - A wireless stethoscope is described, having wireless sensors that are enclosed in disposable pads so that the same pads are not used on more than one patient, preventing cross-infection of patients associated with conventional stethoscopes. The present wireless stethoscope also detects pulmonary sounds and cardiac sounds, allowing the user to monitor one or the other without interference. Also described is a method for diagnosing a pulmonary condition using the wireless stethoscope. | 01-09-2014 |
20140018690 | SENSING RATE OF CHANGE OF PRESSURE IN THE LEFT VENTRICLE WITH AN IMPLANTED DEVICE - An implantable device and method for monitoring S1 heart sounds with a remotely located accelerometer. The device includes a transducer that converts heart sounds into an electrical signal. A control circuit is coupled to the transducer. The control circuit is configured to receive the electrical signal, identify an S1 heart sound, and to convert the S1 heart sound into electrical information. The control circuit also generates morphological data from the electrical information. The morphological data relates to a hemodynamic metric, such as left ventricular contractility. A housing may enclose the control circuit. The housing defines a volume coextensive with an outer surface of the housing. The transducer is in or on the volume defined by the housing. | 01-16-2014 |
20140046208 | COMPRESSIVE SAMPLING OF PHYSIOLOGICAL SIGNALS USING TIME-FREQUENCY DICTIONARIES BASED ON MODULATED DISCRETE PROLATE SPHEROIDAL SEQUENCES - A method of sampling and reconstructing an original physiological signal obtained from a subject includes acquiring a number of samples of the original physiological signal, and generating a reconstructed physiological signal using the samples and a time-frequency dictionary, the time-frequency dictionary having bases which are modulated discrete prolate spheroidal sequences. | 02-13-2014 |
20140100469 | INFLATABLE REMOTE SENSOR VEST SYSTEM FOR PATIENT MONITORING AND DIAGNOSIS - An inflatable vest system includes a wearable vest having an outer surface and an inner surface and a plurality of bladders having a hollow chamber. The bladders are dispersed at selected locations along the vest and disposed adjacent to each other, each having an inlet for selectively receiving and releasing air within its chamber. A plurality of adjustable sensors are attached to the vest and disposed within the vicinity of desired locations on the patient's body are provided for exerting pressure on the desired locations as a function of the air pressure of at least one bladder most closely located to the sensor. The vest receives control signals from a remote physician system that selectively activating and deactivating one of the sensors, and/or increase and decrease air pressures in desired one of the bladders. | 04-10-2014 |
20140107515 | TELEMEDICAL STETHOSCOPE - The present invention relates to a telemedical stethoscope, which automatically diagnoses a disease, and records visually and auditorily, and stores the stethoscope data on a screen. The present invention enhances primary diagnosis and treatment effect for a patient by transmitting/receiving the data to/from a doctor at a medical center and by receiving a telemedicine service. In addition, the present invention transmits the data to a health management program so as to be used for personal healthcare and disease prognosis decision of a patient. | 04-17-2014 |
20140163407 | METHOD OF PROCESSING CARDIOVASCULAR SOUND SIGNALS - Each spectral slice array of a plurality is generated for each time segment of a plurality of time segments of a cardiovascular sound signal is convolved with a local spectral averaging window to generate a local spectral average array that is searched for bruit candidates responsive to associated time power or energy values, power levels, and skew values, so as to provide an indication of cardiovascular disease, that may also be responsive to skew-responsive and power-level-responsive probability terms and to a composite thereof. A probability indicator of cardiovascular disease is responsive to a second product of second terms, each second term responsive to a first product of first terms, each first term representative of a probability of no bruits for all time segments for each frequency segment of a two dimensional bruit candidate probability array, each second term representative of a probability of no repetitive bruits within each frequency segment. | 06-12-2014 |
20140171814 | HEART MONITORING DEVICE - The present invention includes devices, methods and systems for reporting a heart rate comprising: an input device; a microprocessor coupled to the input device and a power supply, wherein the microprocessor is programmed with a predetermined heartbeat threshold and calculates the number of times the input device is actuated over a predetermined amount of time; and a display connected to the microprocessor that receives the calculated heart rate and displays whether the heart rate is below, at or above predetermined threshold, e.g., when a patient has less than 60 heartbeats per minute, between 60 and 100 heartbeats per minute and greater than 100 heartbeats per minute. | 06-19-2014 |
20140180153 | SYSTEM AND METHOD FOR ACOUSTIC DETECTION OF CORONARY ARTERY DISEASE AND AUTOMATED EDITING OF HEART SOUND DATA - Systems and methods for acoustic detection of coronary artery disease (CAD) and automated editing of heart sound data are provided. | 06-26-2014 |
20140276163 | DIAGNOSTIC AND OPTIMIZATION USING EXERCISE RECOVERY DATA - An apparatus, such as a cardiac function management system can detect heart sounds following a sensed transition in physical activity level, such as from an elevated physical activity level to rest. A technique can include systems, methods, machine-readable media, or other techniques that can include identifying a physical activity level transition, receiving a heart sound signal, determining characteristics of the heart sound and subject physiologic activity to provide an indication, such as a heart failure status indication. | 09-18-2014 |
20140276164 | HEART FAILURE MANAGEMENT TO AVOID REHOSPITALIZATION - Systems and methods are described for subject rehospitalization management. In an example, multiple physiologic signals can be obtained from a subject using multiple sensors. In response to a hospitalization event, pre-hospitalization characteristics of the multiple physiologic signals can be identified. Post-hospitalization characteristics of the multiple physiologic signals can be identified, including characteristics that differ from their corresponding pre-hospitalization characteristics. Later subsequent physiologic signals can be further monitored after the hospitalization event, such as using the same multiple sensors, and subsequent physiologic signal characteristics can be identified. In an example, a heart failure diagnostic indication can be determined using information about the pre-hospitalization characteristics, the post-hospitalization characteristics, and the subsequent characteristics. Information about relative changes in signal characteristics from multiple sensors can be used to identify particular subject physiologic signals to monitor during subsequent periods. | 09-18-2014 |
20140343446 | Model-Based Method for Assessing Acoustic Signal Quality in Heart Monitoring Device - A model-based method for assessing acoustic signal quality in a heart monitoring device. The personal heart sound interval distribution of a person being actively monitored is compared with a modeled global heart sound interval distribution shared by most human beings after which processing action is taken consistent with the quality assessment. The error in the best fit between the personal interval distribution and the global interval distribution is presumed to be caused predominantly by noise, allowing the quality of the fit to serve as a proxy for the level of noise in the acoustic signal and used in making processing decisions. | 11-20-2014 |
20140350425 | THIRD HEART SOUND ACTIVITY INDEX FOR HEART FAILURE MONITORING - A cardiac rhythm management system provides for the trending of a third heart sound (S3) index. The S3 index is a ratio, or an estimate of the ratio, of the number of S3 beats to the number of all heart beats, where the S3 beats are each a heart beat during which an occurrence of S3 is detected. An implantable sensor such as an accelerometer or a microphone senses an acoustic signal indicative heart sounds including S3. An S3 detector detects occurrences of S3 from the acoustic signal. A heart sound processing system trends the S3 index on a periodic basis to allow continuous monitoring of the S3 activity level, which is indicative of conditions related to heart failure. | 11-27-2014 |
20140371617 | REMOTE HEALTH CARE DIAGNOSTIC TOOL - Disclosed are patient health systems and methods for transmission of patient health data from a patient data collection system to a provider analysis system. The patient health system include the patient data collection system coupled to a communications network and located proximate a patient, for collecting patient physiological data. The patient health system further includes the provider analysis system coupled to the communications network and located remote from the patient data collection system. The patient data collection system includes a patient data collection device couple to a patient work station. The patient work station is configured to transmit patient physiological data upon a determination that the communications network is reliable. | 12-18-2014 |
20150088021 | VITAL SIGNS SENSING APPARATUS AND ASSOCIATED METHOD - A vital signs sensing apparatus includes a sound sensing unit and a pressure unit. The sound sensing unit senses a sound inside a body of a user and produces an audio signal. The pressure unit produced a pressure signal. The pressure signal indicates a degree of closeness between the vital signs sensing apparatus and the user. The audio signal is transformed into a processed audio signal according to the pressure signal. | 03-26-2015 |
20150105682 | WIRELESS STETHOSCOPE AND METHOD OF USE THEREOF - A wireless stethoscope is described, having wireless sensors that are enclosed in disposable pads so that the same pads are not used on more than one patient, preventing cross-infection of patients associated with conventional stethoscopes. The present wireless stethoscope also detects pulmonary sounds and cardiac sounds, allowing the user to monitor one or the other without interference. Also described is a method for diagnosing a pulmonary condition using the wireless stethoscope. | 04-16-2015 |
20150126886 | METHOD AND APPARATUS FOR DETECTING ATRIAL FILLING PRESSURE - A cardiac rhythm management system provides for ambulatory monitoring of hemodynamic performance based on quantitative measurements of heart sound related parameters for diagnostic and therapeutic purposes. Monitoring of such heart sound related parameters allows the cardiac rhythm management system to determine a need for delivering a therapy and/or therapy parameter adjustments based on conditions of a heart. This monitoring also allows a physician to observe or assess the hemodynamic performance for diagnosing and making therapeutic decisions. Because the conditions of the heart may fluctuate and may deteriorate significantly between physician visits, the ambulatory monitoring, performed on a continuous or periodic basis, ensures a prompt response by the cardiac rhythm management system that may save a life, prevent hospitalization, or prevent further deterioration of the heart. | 05-07-2015 |
20150297147 | HEART MONITORING DEVICE - The present invention includes devices, methods and systems for reporting a heart rate comprising: an input device; a microprocessor coupled to the input device and a power supply, wherein the microprocessor is programmed with a predetermined heartbeat threshold and calculates the number of times the input device is actuated over a predetermined amount of time; and a display connected to the microprocessor that receives the calculated heart rate and displays whether the heart rate is below, at or above predetermined threshold, e.g., when a patient has less than 60 heartbeats per minute, between 60 and 100 heartbeats per minute and greater than 100 heartbeats per minute. | 10-22-2015 |
20150305687 | System and method for indicating coronary artery disease risk based on low and high frequency bands - A system and method for diagnosing coronary artery disease (CAD) comprises an acoustic sensor to be placed on the chest of a patient to generate acoustic signals S | 10-29-2015 |
20160073963 | EXERCISE PHYSIOLOGICAL SENSING SYSTEM, MOTION ARTIFACT SUPPRESSION PROCESSING METHOD AND DEVICE - An exercise physiological sensing system, a motion artifact suppression processing method and a motion artifact suppression processing device for obtaining a stable exercise heart rate signal of a user during exercise are provided. The exercise physiological sensing system includes a bone conduction object, a signal-to-noise ratio analysis module, and a computation module. The bone conduction object has a physiological sensor. The physiological sensor detects a physiological signal of otic bones of the user. The signal-to-noise ratio analysis module is coupled to the physiological sensor and detects a stability of the physiological signal of the otic bones. The computation module is coupled to the signal-to-noise ratio analysis module and generates the stable exercise heart rate signal according to the physiological signal of the otic bones. Accordingly, the exercise physiological sensing system can effectively improve the detected stability of an exercise physiological signal. | 03-17-2016 |
20160073966 | EXERCISE PHYSIOLOGICAL SENSING SYSTEM, MOTION ARTIFACT SUPPRESSION PROCESSING METHOD AND DEVICE - An exercise physiological sensing system, a motion artifact suppression processing method and a motion artifact suppression processing device for obtaining a stable exercise heart rate signal of a user during exercise are provided. The exercise physiological sensing system includes a bone conduction body, a signal-to-noise ratio analysis module, and a computation module. The bone conduction body has a physiological sensor. The physiological sensor detects a physiological signal from a detected area of the user. The signal-to-noise ratio analysis module is coupled to the physiological sensor and detects a quality stability of the physiological signal. The computation module is coupled to the signal-to-noise ratio analysis module and generates the stable exercise heart rate signal according to the physiological signal. Accordingly, the exercise physiological sensing system can effectively improve the stability of the detected physiological signal during exercise. | 03-17-2016 |
20160192846 | APPARATUS AND METHOD FOR DETECTING HEART MURMURS | 07-07-2016 |
20160192888 | METHODS AND SYSTEM FOR TRACKING HEART SOUNDS | 07-07-2016 |
20180020983 | PRESSURE SENSOR TO DETECT BODY SOUNDS | 01-25-2018 |
20180020987 | INDICATION OF RISK FOR CORONARY ARTERY DISEASE | 01-25-2018 |
20190142290 | HARNESSING S1 VARIABILITY FOR AF DETECTION | 05-16-2019 |