METHOD AND APPARATUS TO MONITOR PHYSIOLOGIC AND BIOMETRIC PARAMETERS USING A NON-INVASIVE SET OF TRANSDUCERS
First Claim
1. A system to monitor the cardiac cycle for the purposes of determining a physical condition of a patient, comprising:
- a phonocardiography transducer to generate an audio signal waveform corresponding to said cardiac cycle;
a data acquisition unit for conditioning said signal waveforms, data acquisition, analog-to-digital processing, data storage, and communication;
a processor including a non-transitory computer-readable storage device storing a waveform analysis software module comprising a series of computer-readable instructions for analyzing the signal waveforms by the steps of,identifying the presence or absence of one or more time based features from said phonocardiographic waveform,computing a metric comprising a time-based function of the identified time based features from said phonocardiographic waveform function.
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Abstract
Method and apparatus for quantitative and qualitative determination of heart rate, stroke volume, cardiac output, and central fluid volume. Phonocardiography based technique using multiple transducers and multi-sensor processing algorithms provides a non-invasive method of evaluating the output of the heart. This basic system coupled with additional sensor elements provides a wide range of potential capabilities. A system comprising these techniques in a wearable form provides a non-invasive method of determining hydration status and blood volume status. Phonocardiography augmented with multi-sensor signal processing techniques improves signal quality to analyze heart sounds and associated features (e.g. S1 and S2, amongst others). Noise compensation and cancellation techniques for phonocardiography further improve signal to noise ratio to reject external disturbances.
13 Citations
33 Claims
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1. A system to monitor the cardiac cycle for the purposes of determining a physical condition of a patient, comprising:
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a phonocardiography transducer to generate an audio signal waveform corresponding to said cardiac cycle; a data acquisition unit for conditioning said signal waveforms, data acquisition, analog-to-digital processing, data storage, and communication; a processor including a non-transitory computer-readable storage device storing a waveform analysis software module comprising a series of computer-readable instructions for analyzing the signal waveforms by the steps of, identifying the presence or absence of one or more time based features from said phonocardiographic waveform, computing a metric comprising a time-based function of the identified time based features from said phonocardiographic waveform function. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification