Device and method for improving identification accuracy of fetal heart rate deceleration

Patent metadata

Field	Value
Publication number	US-9364197-B2
Application number	US-201214349326-A
Country	US
Kind code	B2
Filing date	Sep 26, 2012
Priority date	Oct 13, 2011
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

A device and method for improving the identification accuracy of fetal heart rate deceleration. The method includes: collecting fetal heart rate data ( 101 ); performing baseline identification on the collected fetal heart rate data ( 102 ); preprocessing the collected fetal heart rate data ( 103 ); performing deceleration identification on the preprocessed fetal heart rate data according to preset deceleration judgment standards and a fetal heart rate data baseline to obtain a decelerated data segment ( 104 ); and calculating a deceleration attribute value of each decelerated data segment ( 105 ), and outputting the decelerated data segment and calculation result ( 106 ). The present invention can effectively eliminate the baseline variation part by employing methods such as the dynamic threshold area method, continuous wave peak detection and composite deceleration detection and so on, and accurately identify each deceleration and the type thereof, avoiding the defects of the existing method, which easily causes large deceleration identification errors but cannot identify continuous deceleration or eliminate baseline variation and cannot identify composite deceleration and so on. The solution in the present invention is not only suitable for the situation where deceleration occurs independently and is typical deceleration but also is suitable for the situation where continuous deceleration and composite deceleration occur.

First claim

The invention claimed is:

1. A device for improving identification accuracy of fetal heart rate deceleration, wherein the device comprises a fetal heart rate data collection module, a fetal heart rate data baseline identification module, a fetal heart rate data preprocessing module, a fetal heart rate data deceleration identification module and an output module;
the fetal heart rate data collection module is used for collecting fetal heart data of a preset duration to obtain a fetal heart rate data sequence H(n);
the fetal heart rate data baseline identification module is connected with the fetal heart rate data collection module to be used for receiving the fetal heart rate data sequence H(n) transmitted by the fetal heart rate data collection module and identifying a fetal heart rate baseline sequence B(n);
the fetal heart rate data preprocessing module is connected with the fetal heart rate data collection module to be used for receiving the fetal heart rate data sequence H(n) transmitted by the fetal heart rate data collection module and preprocessing the sequence H(n) to obtain a fetal heart rate data sequence V(n);
the fetal heart rate data deceleration identification module is connected with the fetal heart rate data baseline identification module and the fetal heart rate data preprocessing module to be used for receiving the fetal heart rate baseline sequence B(n) transmitted by the fetal heart rate data baseline identification module and the preprocessed sequence V(n) transmitted by the fetal heart rate data preprocessing module; and performing deceleration identification for the preprocessed fetal heart rate data sequence V(n) to obtain a decelerated data segment, according to preset deceleration judgment standards and the fetal heart rate data baseline sequence B(n), and
the output module is connected with the fetal heart rate data deceleration identification module to be used for receiving and outputting the decelerated data segment transmitted by the fetal heart rate data deceleration identification module.

2. The device for improving identification accuracy of the fetal heart rate data deceleration according to claim 1 , wherein the device for improving identification accuracy of the fetal heart rate deceleration also comprises a fetal heart rate signal collection and processing transformation module, a fetal heart rate data deceleration validation module, a fetal heart rate data deceleration judgment standard setting module, a fetal heart rate data deceleration type judgment module, a collection duration setting and judgment module and a fetal heart rate data deceleration attribute calculation module, wherein
the fetal heart rate signal collection and processing transformation module is connected with the fetal heart rate data collection module to be used for collecting a fetal heart signal, transforming the signal into fetal heart rate data and transmitting the fetal heart rate data to the fetal heart rate data collection module;
the fetal heart rate deceleration validation module is connected with the fetal heart rate data deceleration identification module and the fetal heart rate data deceleration attribute calculation module to be used for receiving the decelerated data segment transmitted by the fetal heart rate data deceleration identification module; according to the loss condition of each decelerated signal, the fetal heart rate data deceleration validation module validates whether each decelerated sequence segment is real deceleration, and transmits the validation result to the fetal heart rate data deceleration attribute calculation module;
the fetal heart rate data judgment standard setting module is connected with the fetal heart rate deceleration identification module to be used for setting the fetal heart rate data deceleration judgment standards in advance and transmitting the judgment standards to the fetal heart rate data deceleration identification module;
the fetal heart rate data deceleration type judgment module is connected with the fetal heart rate data deceleration attribute calculation module to be used for judging the deceleration type under the conditions of collecting uterine contraction data and transmitting the judgment result to the fetal heart rate data deceleration attribute calculation module;
the collection duration setting and judgment module is connected with the fetal heart rate data collection module to be used for setting the fetal heart rate collection duration and judging whether the collection data time exceeds the set duration; If the collection data time exceeds the set duration, the collection duration setting and judgment module transmits a timeout signal to the fetal heart rate data collection module; and
the fetal heart rate data deceleration attribute calculation module is connected with the fetal heart rate data deceleration identification module and the output module to be used for receiving the deceleration data segment transmitted by the fetal heart rate data deceleration identification module, calculating the duration, amplitude and other deceleration attribute values of the each deceleration data segment and transmitting the calculated values to the output module.

3. The device for improving the identification accuracy of the fetal heart rate data deceleration according to claim 1 , wherein the fetal heart rate data preprocessing module further comprises:
an incorrect data processing unit used for processing the incorrect data of the fetal heart rate data sequence H(n) and obtaining the effective fetal heart rate data sequence V(n); and
an interpolation processing unit used 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 improving the identification accuracy of the fetal heart rate data deceleration according to claim 1 , wherein the fetal heart rate data deceleration identification module further comprises:
a standard comparison unit used for judging whether there is a sequence segment meeting a preset deceleration judgment standard in the fetal heart rate data sequence C(n);
a deceleration and variation distinguishing unit used for inspecting and distinguishing deceleration and baseline variation sequence segments in the sequence C(n) meeting the standard, according to the fetal heart data sequence C(n) meeting the judgment standard and the corresponding baseline sequence B(n) thereof; and
a deceleration number analysis unit used for analyzing the continuous deceleration number of a deceleration sequence in the sequence C(n) meeting the standard.

5. The device for improving the identification accuracy of the fetal heart rate data deceleration according to claim 1 , wherein the output module further comprises:
a display unit used for displaying the identified deceleration data segment and the attribute value thereof;
a printing unit used for printing and outputting the identified deceleration data segment and the attribute value thereof;
a storage unit used for storing the identified deceleration data segment and the attribute value thereof; and
an identification unit used for identifying the identified deceleration data segment and the attribute value thereof.

6. A method for improving the identification accuracy of a fetal heart rate data deceleration, wherein, the method comprises:
Step 1, collecting the fetal heart rate data within a preset duration to obtain a fetal heart rate data sequence H(n);
Step 2, performing baseline identification on the fetal heart rate data sequence H(n) to obtain a fetal heart rate baseline data sequence B(n);
Step 3, preprocessing the fetal heart rate data sequence H(n) to obtain a preprocessed fetal heart rate data sequence C(n);
Step 4

Assignees

• Edan Instruments Inc
• Edan Instruments Inc

Inventors

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

Classifications

• A61B8/5207 Primary

  involving processing of raw data to produce diagnostic data, e.g. for generating an image · CPC title

• A61B8/02

  Measuring pulse or heart rate · CPC title

• A61B8/0866

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

• A61B8/5223

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

• G16H50/30

  for calculating health indices; for individual health risk assessment · CPC title