Apparatus and method for feature extraction and classification of fetal heart rate

Patent metadata

Field	Value
Publication number	US-10368755-B2
Application number	US-201715824215-A
Country	US
Kind code	B2
Filing date	Nov 28, 2017
Priority date	Jun 25, 2013
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

Provided are a device and method for receiving a fetal heart rate (FHR) signal at each interval during a monitoring period, receiving a uterine pressure (UP) signal at each of the intervals to obtain a plurality of FHR-UP signal pairs, and extracting a feature value for each FHR-UP signal pair, with the feature value being extracted from a predefined alphabet of feature values.

First claim

What is claimed:

1. A method for operating an electronic device, the method comprising:
inputting, to a processor of the electronic device, a fetal heart rate (FHR);
inputting, to the processor, a plurality of uterine pressure (UP) values corresponding to the input FHR;
removing, by the processor, artifacts from the FHR and interpolating segments of the FHR;
storing, by a feature extractor, time information of segments of the interpolated FHR segments;
searching sub-segments of the stored time information to detect variability of the FHR;
detecting excess noise in the searched sub-segments;
obtaining a reduced noise FHR signal by removing sub-segments with detected excess noise;
detecting a plurality of sub-segments of the reduced noise FHR signal corresponding to an average heart rate baseline;
detecting at least two sub-segments of the plurality of sub-segments of the reduced noise FHR signal corresponding to contractions based the input plurality of UP values;
indexing each sub-segment of the detected at least two sub-segments, wherein the indexing comprises assigning a respective feature value to each sub-segment of the detected at least two sub-segments; and
outputting, to a display of the electronic device, a sequence of symbols of the respective feature value assigned to each sub-segment.

2. The method of claim 1 , further comprising detecting that the plurality of sub-segments of the reduced noise FHR signal is free of periods with episodic deviations based on the average heart rate baseline.

3. The method of claim 1 , wherein the average heart rate baseline is an average heart rate free from episodic deviations.

4. The method of claim 1 , further comprising mapping each indexed sub-segment.

5. The method of claim 1 , wherein each symbol of the sequence of symbols is one of H x values.

6. An electronic device for monitoring fetal health, the device comprising:
a processor configured to receive a fetal heart rate (FHR) and a plurality of uterine pressure (UP) values corresponding to the input FHR, and remove artifacts from the FHR and interpolate segments of the FHR;
a feature extractor configured to store time information of segments of the interpolated FHR segments; and
a display,
wherein the processor is further configured to control
searching sub-segments of the stored time information to detect variability of the FHR,
detecting excess noise in the searched sub-segments,
obtaining a reduced noise FHR signal by removing the sub-segments with detected excess noise,
detecting a plurality of sub-segments of the reduced noise FHR signal corresponding to an average heart rate baseline,
detecting at least two sub-segments of the plurality of sub-segments of the reduced noise FHR signal corresponding to contractions based the input plurality of UP values,
indexing each sub-segment of the detected at least two sub-segments, wherein the indexing comprises assigning a respective feature value to each sub-segment of the detected at least two sub-segments, and
displaying, by the display, of a sequence of symbols of respective feature values assigned to each sub-segment.

7. The device of claim 6 , wherein the processor is further configured to control detecting that the plurality of sub-segments of the reduced noise FHR signal is free of periods with episodic deviations based on the average heart rate baseline.

8. The device of claim 6 , wherein the processor is further configured to control detecting that the average heart rate baseline is an average heart rate free from episodic deviations.

9. The device of claim 6 , wherein the processor is further configured to control mapping each indexed sub-segment.

10. The device of claim 6 , wherein each symbol of the sequence of symbols is one of H x values.

Assignees

• Univ New York State Res Found

Inventors

• Dash Shishir
• Quirk J Gerald
• Djuric Petar

Classifications

• A61B5/033

  Uterine pressure · CPC title

• A61B5/02411 Primary

  of foetuses · CPC title