Systems and methods for suppressing peaks in a seismocardiogram

A seismogram, accelerometer technology, used in pulse/heart rate measurement, medical science, diagnosis, etc., can solve problems such as discomfort, electrode and cable attachment, etc., to achieve the effect of improving accuracy

Active Publication Date: 2020-02-07
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the attachment of electrodes and cables can become intrusive and uncomfortable during prolonged use of the electrodes and cables as patients are often required to be in the patient room for extended periods of time

Method used

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  • Systems and methods for suppressing peaks in a seismocardiogram
  • Systems and methods for suppressing peaks in a seismocardiogram
  • Systems and methods for suppressing peaks in a seismocardiogram

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Embodiment Construction

[0088] The present invention provides a seismocardiography system comprising: an accelerometer adapted to obtain accelerometer data from a user; and a bandpass filter adapted to filter the accelerometer data. The system also includes: an envelope filter adapted to suppress S2 peaks in the bandpass filtered accelerometer data, wherein the envelope filter comprises: a low pass filter; and a comb filter, wherein the The delay of the comb filter is tuned to the left ventricular ejection time (LVET).

[0089] image 3 A schematic diagram of a seismocardiography system 200 is shown.

[0090] The system includes: preprocessor 210, reference Figure 4 These are described in more detail; the peak detector 220; and the classifier 230. The preprocessor gets data from the accelerometer (eg, figure 1 Accelerometer data 240 for the accelerometer 100 shown in . In this case, accelerometer data includes an acceleration component: a x , a y and a z ; they are on the three orthogonal...

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PUM

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Abstract

The invention provides a seismocardiograph system, which includes an accelerometer, adapted to obtain accelerometer data from user, and a bandpass filter, adapted to filter the accelerometer data. Thesystem further includes an envelope filter, adapted to suppress S2 peaks in the band pass filtered accelerometer data, wherein the envelope filter comprises: a low-pass filter; and a comb filter, wherein the delay of the comb filter is tuned to a left ventricle ejection time (LVET).

Description

technical field [0001] The present invention relates to the field of signal processing, and more particularly to the field of peak suppression in seismocardiography. Background technique [0002] Respiration and heart signals and their corresponding rates are basic vital signs used to monitor a patient's condition. In particular, heart rate is one of the most important vital signs for patient monitors in hospital rooms. Typically, vital signals are generated by sensor electrodes that are attached to the patient. However, the attachment of the electrodes and cables can become intrusive and uncomfortable during prolonged use of the electrodes and cables since patients are often required to be in the patient room for extended periods of time. [0003] In response to this, unobtrusive measurement techniques for monitoring a patient's respiratory and cardiac signals have become increasingly popular. For example, a battery-powered three-axis accelerometer can be attached to the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/11A61B5/00A61B5/024
CPCA61B5/7221A61B5/024A61B5/1102A61B5/6823A61B5/725A61B5/7225A61B2562/0219
Inventor R·M·M·德克斯T·G·埃姆里希
Owner KONINKLJIJKE PHILIPS NV
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