Device and method for enhancing accuracy of recognizing fetus heart rate acceleration data

Patent metadata

Field	Value
Publication number	US-9801609-B2
Application number	US-201214235050-A
Country	US
Kind code	B2
Filing date	Sep 25, 2012
Priority date	Jul 26, 2011
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

The present invention relates to the field of biomedical signal processing, specifically, a device and method of implementation for enhancing the accuracy of fetal heart rate acceleration data recognition. The present invention comprises: collecting fetal heart rate data in a pre-configured period so as to obtain a fetal heart rate data sequence, H(n); performing baseline identification on the fetal heart rate sequence, H(n), to obtain a fetal heart rate baseline data sequence, B(n); pre-processing the fetal heart rate data sequence, H(n), to obtain a pre-processed fetal heart rate data sequence, C(n); performing acceleration recognition on the pre-processed fetal heart rate data sequence, C(n), according to pre-configured acceleration determination criteria and the fetal heart rate baseline data sequence, B(n), to obtain acceleration data segments; calculating an acceleration attribute value for each of the acceleration data segments, and outputting each acceleration data segment and the acceleration attribute value calculation result thereof. The technical solution provided by the present invention effectively distinguishes the variations between the accelerations and the baseline, accurately recognizes each acceleration in continuous accelerations, and avoids the situations of the detected number of fetal heart rate data accelerations being lower than the actual number or being mistaken due to current methods, thereby enhancing the accuracy in recognizing fetal heart rate curve accelerations.

First claim

The invention claimed is:

1. A device for enhancing the accuracy of recognizing fetal heart rate data acceleration, wherein the device comprises a fetal heart rate data collecting module, a fetal heart rate data baseline recognition module, a fetal heart rate data preprocessing module, a fetal heart rate data acceleration recognition module and an output module;
wherein the fetal heart rate data collecting module is configured for performing the fetal heart rate data collection in a pre-configured period to obtain a fetal heart rate data sequence, H(n);
wherein the fetal heart rate data baseline recognition module is connected with the fetal heart rate data collecting module and configured for receiving the fetal heart rate data sequence, H(n) transmitted by the fetal heart rate data collecting module and recognizing a fetal heart rate baseline sequence, B(n);
wherein the fetal heart rate data preprocessing module is connected with the fetal heart rate data collecting module and configured for receiving the fetal heart rate data sequence, H(n), transmitted by the fetal heart rate data collecting module and performing preprocessing on the sequence H(n) to obtain a fetal heart rate data sequence, V(n);
wherein the fetal heart rate data acceleration recognition module is connected with the fetal heart rate data baseline recognition module and the fetal heart rate data preprocessing module and configured for receiving the fetal heart rate baseline sequence, B(n), transmitted by the fetal heart rate data baseline recognition module and the preprocessed sequence, V(n), transmitted by the fetal heart rate data preprocessing module; the acceleration recognition on the preprocessed fetal heart rate data sequence V(n) is performed to obtain an acceleration data segment, according to a pre-configured acceleration determination criteria and the fetal heart rate data baseline sequence, B(n);
wherein the fetal heart rate data acceleration recognition module comprises a criteria comparison unit configured for determining whether there is a sequence segment meeting a pre-configured acceleration determination criteria in the fetal heart rate data sequence, C(n), an acceleration and variation unit configured for inspecting and distinguishing the sequence segments of the variation between acceleration and baseline in the sequence C(n) meeting the criteria, according to the fetal heart rate data sequence C(n) meeting the determination criteria and the corresponding baseline sequence B(n) thereof, and an acceleration number analysis unit configured for analyzing the continuous acceleration number of an acceleration sequence in the sequence C(n) meeting pre-configured acceleration determination criteria; and
wherein the output module is connected with the fetal heart rate data acceleration recognition module and configured for receiving the acceleration data segment transmitted by the fetal heart rate data acceleration recognition module and outputting the acceleration data segment.

2. The device for enhancing the accuracy of recognizing fetal heart rate data acceleration according to claim 1 , wherein the device for enhancing the accuracy of recognizing fetal heart rate data acceleration also comprises a fetal heart rate signal collecting and processing transforming module, a fetal heart rate data acceleration validation module, a fetal heart rate data acceleration determination criteria setting module, a fetal heart rate data acceleration type determination module, a collecting duration setting and determination module and a fetal heart rate data acceleration attribute calculation module, wherein
the fetal heart rate signal collecting and processing transforming module is connected with the fetal heart rate data collecting module and configured for collecting a fetal heart signal, transforming the signal into the fetal heart rate data and transmitting the fetal heart rate data to the fetal heart rate data collecting module;
the fetal heart rate data acceleration validation module is connected with the fetal heart rate data acceleration recognition module and the fetal heart rate data acceleration attribute calculation module and configured for receiving the acceleration data segment transmitted by the fetal heart rate data acceleration recognition module; according to the signal loss condition of each acceleration, the fetal heart rate data acceleration validation module validates whether each acceleration sequence segment is in real acceleration, and transmits the validation result to the fetal heart rate data acceleration attribute calculation module;
the fetal heart rate data acceleration determination criteria setting module is connected with the fetal heart rate acceleration recognition module and configured for setting the fetal heart rate data acceleration determination criteria in advance and transmitting the determination criteria to the fetal heart rate data acceleration recognition module;
the fetal heart rate data acceleration type determination module is connected with the fetal heart rate data acceleration attribute calculation module and configured for determining the acceleration type under the conditions of simultaneously collecting uterine contraction data and transmitting the determination result to the fetal heart rate data acceleration calculation module;
the collecting duration setting and determination module is connected with the fetal heart rate data collecting module and configured for setting the collecting duration of the fetal heart rate data, and determining whether the collected data time exceeds the set duration and if it exceeds the set duration, a timeout signal is transmitted to the fetal heart rate data collecting module; and
the fetal heart rate data acceleration attribute calculation module is connected with the fetal heart rate data acceleration recognition module and the output module and configured for receiving the acceleration data segment transmitted by the fetal heart rate data acceleration recognition module, calculating the duration, amplitude and other acceleration attribute values of each acceleration data segment and transmitting the calculated values to the output module.

3. The device for enhancing the accuracy of recognizing fetal heart rate data acceleration according to claim 1 , wherein the fetal heart rate data preprocessing module further comprises:
an incorrect data processing unit configured for processing the incorrect data of the fetal heart rate data sequence, H(n), to obtain the effective fetal heart rate data sequence, V(n); and
an interpolation processing unit configured for fitting an invalid data part in the effective fetal heart rate data sequence, V(n) with a linear interpolation method to obtain the fetal heart rate data sequence, C(n).

4. The device for enhancing the accuracy of recognizing fetal heart rate data acceleration according to claim 1 , wherein the output module further comprises:
a display unit configured for displaying a recognized acceleration data segment and an attribute value thereof;
a printing unit configured for printing and outputting the recognized acceleration data segment and the attribute value thereof;
a storage unit configured for storing the recognized acceleration data segment and the attribute value thereof; and
a recognition unit configured for recognizing the recognized acceleration data segment and the attribute value thereof.

5. A method for enhancing the accuracy of recognizing fetal heart rate data acceleration, wherein the method comprises:
performing fetal heart rate data collection within pre-configured duration to obtain a fetal heart rate data sequence, H(n);
performing baseline recognition on the fetal heart rate data sequence H(n) to obtain a fetal heart rate baseline data sequence, B(n);
performing preprocessing on

Assignees

• Edan Instruments Inc
• Edan Instruments Inc

Inventors

• Rao Jian
• Chen Dewei
• Zeng Yonghua
• Chen Wusun

Classifications

• A61B8/5223

  for extracting a diagnostic or physiological parameter from medical diagnostic data (for algorithms to analyse biomedical images G06T7/0012) · CPC title

• A61B8/5276

  due to motion · CPC title

• A61B5/02411

  of foetuses · CPC title

• A61B8/0866 Primary

  involving foetal diagnosis; pre-natal or peri-natal diagnosis of the baby · CPC title

• A61B8/02

  Measuring pulse or heart rate · CPC title