Automatic identification method and device for fetal movement

Abstract

The invention discloses an automatic identification method and an automatic identification device for fetal movement. The method comprises the following steps of: performing data acquisition on all signals comprising fetal movement signals; filtering and pre-processing the acquired signals to separate out the fetal movement signals; performing real-time analysis on the signals according to the characteristics of the fetal movement signals to obtain corresponding real-time threshold values; and identifying the separated fetal movement signals according to the obtained threshold values to obtain frequency and duration of the fetal movement. By adopting the scheme, noise of fetal heartbeat, maternal respiration and the like can be effectively filtered, and the fetal movement information can be extracted; an automatic threshold value regulating algorithm can regulate the threshold values aiming at different pregnant women, and can regulate the threshold values along with signal intensity variation in a monitoring process so as to avoid the condition that the fetal movement cannot be detected or is detected falsely because of the fixed threshold values; and the fetal movement information can be accurately identified, and the frequency of the fetal movement and the duration of single fetal movement in the monitoring process can be calculated.

Description

A method and device for automatic fetal movement recognition technical field The invention relates to the field of biomedical signal processing, in particular to a method for automatic recognition of fetal movement and a device for realizing the method. Background technique Fetal movement is an important indicator of fetal safety. Generally, fetal movement detection has clinical significance from the 28th week of pregnancy. Normal fetal movement means that the fetus is healthy in the uterus. The reduction or disappearance of fetal movement is a sign of fetal hypoxia or death. Rapid fetal movement indicates acute hypoxia and may die. In high-risk pregnancies such as pregnancy-induced hypertension, overdue pregnancy, and fetal IUGR, the fetal movement can be reduced before the placental function affects the fetal heart rate. Generally, it can take up to 12-48 hours from the disappearance of fetal movement to the disappearance of fetal heart rate. During pregnancy, the accel...

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Problems solved by technology

However, the threshold value in this method is mostly clinical experience value, which cannot be adjusted according to the signal characteristics of different pregnant women in clinical application, resulting in the inability to accurately detect fetal movement information

A patent on fetal movement algorithm has been published in China, the patent number is CN101194826A, the method used in this patent is wavelet change and BP neural network, the amount of data calculated by this method is large, and it cannot meet the requirements of real-time detection

However, foreign correlation detection algorithms are mostly based on theories of cross-correlation and displacement detection. These methods are complicated in calculation process and are not suitable for clinical application.

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