US 2018/0020987 A1Published application

Indication of risk for coronary artery disease

AssigneeAcarix AS

InventorsSamuel Emil Schmidt, Johannes Jan Struijk

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Abstract

A way of indicating a risk for coronary artery disease is disclosed. A first plurality of first sound recordings of heartbeats and second plurality of second sound recording of the ambient background are obtained. A filtering of each first sound recording is performed by using a simultaneously recorded second sound recording. The filtering of each first sound recording involves determining a diastolic period of the heartbeat of the first sound recording, and performing an adaptive filtering of the first sound recording based in the diastolic period of the first sound recording and the simultaneously recorded second sound recording. This is followed by determination of an indication of the risk for coronary artery disease based on the filtered first sound recordings.

Claims14

Dependent claims

A method for indicating a risk for coronary artery disease for a person, the method comprising;

(a) obtaining a first plurality of first sound recordings, wherein each first recording is of a heartbeat of the person,
(b) obtaining a second plurality of second sound recording, wherein each second sound recording is of an ambient background surrounding the person and being recorded simultaneously to a first sound recording of the first plurality,
(c) performing a filtering of each first sound recording of the first plurality by using a simultaneously recorded second sound recording of the second plurality, the filtering of each first sound recording comprises:
(i) determining a diastolic period of the heartbeat of the first sound recording, and
(ii) determining a first portion of the first sound recording and a second portion of the simultaneously recorded second sound recording, wherein the first portion and the second portion are covered by the diastolic period,
(iii) determining an adaptive filter for the first sound recording, wherein the adaptive filter is based on the first portion and the second portion and configured for reducing noise originating from the ambient background that is present in both the first sound recording and in the simultaneously recorded second sound recording, and
(iv) employing the adaptive filter to the first sound recording, and
(d) determining an indication of the risk for coronary artery disease based on the filtered first sound recordings of the first plurality.

5 more elements

A system for indicating a risk for coronary artery disease for a person, wherein the system comprises;

(A) a first acoustic sensor configured to be placed on the chest of the person and for recording heartbeats,
(B) a second acoustic sensor configured to be placed at the person and for recording ambient background sounds,
(C) a processor operatively connected with the first acoustic sensor and the second acoustic sensor and configured to:
(a) obtain a first plurality of first sound recordings with the first acoustic sensor, wherein each first recording is of a heartbeat of the person,
(b) obtain a second plurality of second sound recording with the second acoustic sensor, wherein each second sound recording is of the ambient background surrounding the person and being recorded simultaneously to a first sound recording of the first plurality,
(c) perform a filtering of each first sound recording of the first plurality by using a simultaneously recorded second sound recording of the second plurality, the filtering of each first sound recording comprises:
(i) determining a diastolic period of the heartbeat of the first sound recording, and
(ii) determining a first portion of the first sound recording and a second portion of the simultaneously recorded second sound recording, wherein the first portion and the second portion are covered by the diastolic period,
(iii) determining an adaptive filter for the first sound recording, wherein the adaptive filter is based on the first portion and the second portion and configured for reducing noise originating from the ambient background that is present in both the first sound recording and in the simultaneously recorded second sound recording, and
(ivi) employing the adaptive filter to the first sound recording, and
(d) determining an indication of the risk for coronary artery disease based on the filtered first sound recordings of the first plurality.

8 more elements

A computer program product for being used in a system comprising:

(A) a first acoustic sensor configured to be placed on the chest of a person and for recording heartbeats, (B) a second acoustic sensor configured to be placed at the person and for recording ambient background sounds, and (C) a processor operatively connected with the first acoustic sensor and the second acoustic sensor, the computer program product comprising program code instructions configured to, when executed by the processor of the system, cause the processor to:
(a) obtain a first plurality of first sound recordings with the first acoustic sensor, wherein each first recording is of a heartbeat of the person,
(b) obtain a second plurality of second sound recording with the second acoustic sensor, wherein each second sound recording is of the ambient background surrounding the person and being recorded simultaneously to a first sound recording of the first plurality,
(c) perform a filtering of each first sound recording of the first plurality by using a simultaneously recorded second sound recording of the second plurality, the filtering of each first sound recording comprises:
(i) determining a diastolic period of the heartbeat of the first sound recording, and
(ii) determining a first portion of the first sound recording and a second portion of the simultaneously recorded second sound recording, wherein the first portion and the second portion are covered by the diastolic period,
(iii) determining an adaptive filter for the first sound recording, wherein the adaptive filter is based on the first portion and the second portion and configured for reducing noise originating from the ambient background that is present in both the first sound recording and in the simultaneously recorded second sound recording, and
(iv) employing the adaptive filter to the first sound recording, and
(d) determining an indication of the risk for coronary artery disease based on the filtered first sound recordings of the first plurality.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/551,356Filed 8 Apr 2016
Priority: EP 15163018.39 Apr 2015
Published: 25 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

A61B 5/7275
Specific aspects of physiological measurement analysis: determining trends in physiological measurement data; Predicting development of a medical…
A61B 5/02444
Measuring pulse rate or heart rate: details of sensor
A61B 5/7203
Signal processing specially adapted for physiological signals or for diagnostic purposes: for noise prevention, reduction or removal
A61B 5/721
Of noise induced by motion artifacts: using a separate sensor to detect motion or using motion information derived from signals other than the…

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US 10,849,567 B2Related patent
US 2018/0020987 A1This patent

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