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Anti-interference processing method and device for fetal movement detection

A processing method and processing device technology, applied in medical science, acoustic wave diagnosis, infrasonic wave diagnosis, etc., can solve problems such as fetal movement misdetection, uterine amniotic fluid shaking, etc., and achieve the effect of reducing influence and improving accuracy

Active Publication Date: 2015-04-29
EDAN INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the movement of the mother will cause the amniotic fluid to shake in the uterus. The existing fetal monitoring probes only rely on the fetal heart rate Doppler probe to detect fetal movement in the uterus.

Method used

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  • Anti-interference processing method and device for fetal movement detection
  • Anti-interference processing method and device for fetal movement detection
  • Anti-interference processing method and device for fetal movement detection

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 1 The first implementation process of the anti-interference processing method for fetal movement detection provided in the first embodiment of the present invention is shown. For convenience of description, only the parts related to the present invention are shown.

[0058] In the embodiment of the present invention, the probe for detecting the fetal movement signal is a Doppler probe, so as to obtain the fetal movement Doppler frequency shift signal from the abdomen of the pregnant woman, and then the fetal movement Doppler frequency shift signal is subjected to low-pass filtering to suppress the fetal heart rate signal. interference, and amplify the Doppler frequency-shifted signal. Preferably, the probe for detecting fetal movement signals may also be a pressure sensor probe. Compared with the two, the Doppler probe has higher sensitivity, can directly detect the activity of the fetus, and is not easily disturbed by the maternal breathing signal. In this emb...

Embodiment 2

[0080] figure 2 (a) shows the implementation process of judging whether the fetal movement energy envelope signal changes effectively in the fetal movement detection anti-interference processing method provided in the first embodiment of the present invention. For the convenience of description, only the parts related to the present invention are shown.

[0081] In the embodiment of the present invention, the effective change of the fetal movement energy envelope signal means that the total energy of the fetal movement energy envelope signal within the first preset time period exceeds the first preset threshold, so the judgment process includes:

[0082] In step S201, the total signal energy of the fetal movement energy envelope signal within a first preset duration range is calculated.

[0083] In step S202, it is determined whether the total energy of the signal is greater than a first preset threshold.

[0084] In step S203, when the total energy of the signal is greater ...

Embodiment 3

[0093] In the embodiment of the present invention, according to whether the fetal movement energy envelope signal and the maternal movement energy envelope signal described in the second embodiment are effectively changed, there are the following four fetal movement signal processing methods.

[0094]a. When neither the fetal movement energy envelope signal nor the maternal movement energy envelope signal changes effectively, it is determined that both the mother and the fetus are in a quiet state, the fetal movement count value remains unchanged, and the fetal movement curve shows no fetal movement.

[0095] b. When the maternal movement energy envelope signal changes effectively but the fetal movement energy envelope signal does not change effectively, it is determined that the mother is in motion, but the fetus is in a quiet state, the fetal movement count value remains unchanged, and the fetal movement curve shows no fetal movement.

[0096] c. When the fetal movement energ...

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Abstract

The invention is applicable to the technical field of medical equipment and particularly relates to a fetal movement detecting method and device. The method includes: acquiring an original signal of fetal movement and an original signal of maternal movement, subjecting both the original signal of fetal movement and the original signal of maternal movement to preprocessing and envelope extracting to obtain an envelope signal of fetal movement energy and an envelope signal of maternal movement energy; if both the envelope signal of fetal movement energy and the envelope signal of maternal movement energy have effective changes, subjecting the envelope signal of fetal movement energy to interference recognition and interference processing, and outputting the envelop signal of fetal movement energy subjected to the interference processing. Signal interference generated by maternal movement and included in the envelope signal of fetal movement energy can be filtered, the influence of maternal movement upon fetal movement detection is effectively reduced, and fetal movement detection is more accurate.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to an anti-interference processing method and device for fetal movement detection. Background technique [0002] Fetal movement is the activity of the fetus in the uterus of pregnant women, and it is also an important indicator of the safe state of the fetus in the uterus. During normal pregnancy, pregnant women at 18-20 weeks of pregnancy can perceive fetal movement. After 20 weeks, the fetal movement increases gradually with the increase of gestational weeks, and reaches a peak at 32 weeks. After that, the fetal movement decreases, and the post-term pregnancy decreases significantly. Clinically, fetal movement is mainly divided into two categories: pregnant women can perceive fetal movement and pregnant women cannot perceive fetal movement. [0003] At present, the main method of fetal movement detection at home and abroad is to use a manual marker, and preg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00
CPCA61B8/0866A61B8/4444A61B8/488A61B8/5269
Inventor 刘锦群罗崇
Owner EDAN INSTR