Techniques for blood pressure measurement by implantable device
First Claim
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1. A device, comprising:
- a sensing channel for generating signals reflective of cardiac electrical activity;
an intravascular pressure sensor for generating blood pressure waveforms;
a controller interfaced to the sensing channel and the intravascular pressure sensor; and
,wherein the controller is programmed to collect a plurality of blood pressure waveforms as digitized sample values, align the collected waveforms by making the time at which each corresponding sample value is collected the same with respect to detected cardiac electrical activity among the collected waveforms, and compute an average blood pressure waveform by averaging corresponding samples of the collected waveforms.
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Abstract
An implantable cardiac device is configured and programmed to collect blood pressure waveforms from one or more implantable pressure sensors. Techniques are described for extracting features and reducing noise in the pressure waveforms by averaging waveforms which are aligned with a detected cardiac cycle. Noise can also be reduced by gating and calibration functions performed in accordance with other sensor data.
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Citations
8 Claims
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1. A device, comprising:
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a sensing channel for generating signals reflective of cardiac electrical activity; an intravascular pressure sensor for generating blood pressure waveforms; a controller interfaced to the sensing channel and the intravascular pressure sensor; and
,wherein the controller is programmed to collect a plurality of blood pressure waveforms as digitized sample values, align the collected waveforms by making the time at which each corresponding sample value is collected the same with respect to detected cardiac electrical activity among the collected waveforms, and compute an average blood pressure waveform by averaging corresponding samples of the collected waveforms. - View Dependent Claims (2, 3, 4)
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5. A method, comprising:
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generating signals reflective of cardiac electrical activity; generating blood pressure waveforms from an intravascular location; collecting a plurality of blood pressure waveforms as digitized sample values and aligning the collected waveforms by making the time at which each corresponding sample value is collected the same with respect to detected cardiac electrical activity among the collected waveforms; and
,compute an average blood pressure waveform by averaging corresponding samples of the collected waveforms. - View Dependent Claims (6, 7, 8)
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Specification