Method and device for detecting instant heart rate of fetus on basis of Shanon envelope

Abstract

The invention discloses a method and device for detecting the instant heart rate of a fetus on the basis of a Shanon envelope. The method comprises the steps of collecting the heart sound signals of the fetus; carrying out smoothing and normalization on the collected signals so as to obtain pre-processed signals; calculating the Shanon envelope according to the pre-processed signals, and drawing a Shanon envelope curve; calculating the instant heart rate of the fetus according to the Shanon envelope curve. The method is simple, the result is accurate, and the method can better serve clinic fetal monitoring. The device comprises a data collection unit, a pre-processing unit, a Shanon envelope drawing unit, an instant heart rate calculating unit, a display unit and a printing unit. The device is simple in structure, reliable in performance and convenient to use, and results are displayed directly.

Description

technical field [0001] The invention relates to the field of fetal heart rate monitoring, and more specifically, to a method and device for detecting fetal instantaneous heart rate based on Shannon envelope. Background technique [0002] Fetal heart rate monitoring is the most common method of fetal monitoring to predict the health of the fetus in utero. As early as the beginning of the 19th century, obstetricians used fetal heart auscultation to estimate the status of the fetus in the uterus. With the development of ultrasonic Doppler technology, electronic fetal monitoring (EFM) has become the most commonly used fetal monitoring. method. A healthy fetus undergoes subtle changes at different moments in the uterus, and changes in the fetal heart rate are a manifestation of the regulation of the circulatory system and the central nervous system. The internal reserve capacity and hypoxia tolerance can greatly reduce the distress caused by hypoxia and ischemia, resulting in f...

AI Technical Summary

Problems solved by technology

Using the autocorrelation method to extract the fetal heart rate signal, the effect is not good enough, mainly because the fetal heart sound signal is periodic, but not a deterministic periodic signal, and the fetal heart sound signal waveform is also affected by the fetus itself and its surrounding environment, and the cycle is not fixed Changeless

Both the period and the waveform have random changes, which makes it difficult to detect the autocorrelation function waveform

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