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Extraction method for cardiotocography acceleration characteristic parameters

A technology of feature parameters and extraction methods, which is applied in the field of biomedical signal processing, can solve problems such as insufficient information extraction, achieve the effects of reducing errors, simple and convenient steps, and improving interpretation efficiency

Active Publication Date: 2015-11-11
BEIJING UNIV OF TECH +1
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Problems solved by technology

[0003] At present, the analysis of fetal heart rate acceleration is mainly to classify and count the acceleration by visual method, and the information contained in the acceleration of fetal heart rate signal is not sufficiently extracted.

Method used

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  • Extraction method for cardiotocography acceleration characteristic parameters
  • Extraction method for cardiotocography acceleration characteristic parameters
  • Extraction method for cardiotocography acceleration characteristic parameters

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Embodiment Construction

[0028] A more typical specific implementation of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] A typical application scenario of the present invention is to use the fetal heart rate monitor heart rate signal to obtain characteristic parameters related to acceleration. Therefore, it is possible to obtain more objective and comprehensive information about the fetal heart rate signal by using the mature technology of the existing fetal heart rate signal acquisition and the rich acceleration characteristic parameters.

[0030] Such as figure 1 As shown, after the extraction process starts, first select the corresponding set threshold according to the gestational week of the subject. Take a subject who is 31 years old and 39 weeks gestational as an example, set the gestational week in step T1. According to the setting in step T2, the system automatically selects the set threshold of the corresponding population according ...

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Abstract

The invention provides an acceleration parameter obtaining method based on fetal heart rate signals in cardiotocography. A signal input detection module, an acceleration signal recognition and extraction module, a unit acceleration rate calculation module and an acceleration parameter output module are involved. The signal input detection module can conduct signal preprocessing and effective signal extraction. The acceleration signal recognition and extraction module can conduct base line calculation, acceleration signal recognition, acceleration signal extraction and acceleration signal preprocessing. The unit acceleration rate calculation module can conduct unit acceleration rate calculation and unit time acceleration cell number calculation. By means of the method, related acceleration characteristic parameters can be obtained through fetal heart rate signals, error caused by a visual inspection method which is mainly adopted at present is reduced, and the cardiotocography graph interpretation efficiency is effectively improved.

Description

Technical field [0001] The invention relates to the field of biomedical signal processing, in particular to a method for extracting characteristic parameters of fetal heart rate acceleration in fetal heart rate monitoring. Background technique [0002] Electronic fetal heart rate monitoring, as an intrauterine monitoring technology for real-time acquisition of fetal heart rate signals and maternal contractions, is currently widely used in clinical obstetrics. Since the fetus is located in the womb of the mother's abdomen, the fetal heart sound signal is easily interfered by noise from the mother's body, sensors, and the external environment. At present, most fetal heart monitoring systems use the principle of ultrasound Doppler and auto-correlation algorithms to calculate the fetal instantaneous heart rate. Fetal heart rate acceleration, as an important part of fetal electronic monitoring graphics, is a phenomenon in which the fetal heart rate rises rapidly. It is shown on the g...

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Application Information

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IPC IPC(8): A61B5/0444A61B5/0245A61B5/344
Inventor 张松李广飞杨琳王妍李淑芳杨益民李旭雯
Owner BEIJING UNIV OF TECH
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