胎心音

TXH-1型胎心音换能器的研制

The development of the TXH-1 type fetal heart sound transducer

胎心音的主要频率范围集中在60~180Hz，因此在对信号进行A/D采样之前，应先设计滤波电路，滤除50Hz工频的谐波分量以及母体噪音。

The major frequency range of the fetal heart sound focus on 60 ~ 180 Hz . Before sampling the fetal heart sound , it is need to design filter circuit to percolate the syntonic of 50 Hz power frequency and the noise of the matrix .

胎心音检测系统中滤波电路的设计

Design of filter circuit in the system of detecting fetal heart sound

胎儿心音换能器是分娩监护系统中的关键部件，目前使用的胎心音换能器的主要问题是抗干扰能力差。

The fetal heart sound transducer is a Key component of the delivery monitor . The main problem with traditional transducers is their low anti-interference ability .

试验结果证明：检测到宫血音的时间比胎心音、胎血音早34～38天，与直肠检查法相比较，其符合率高；

The experiment showed that the detectable time of sound of uterine blood flow was 34 & 38 days earlier than that of the heart beat and the foetal blood flow , and more reliable than the diagnosis of rectal palpation .

依据B超检查正确评估宫内胎儿生长发育情况，加强孕期基础护理，密切注意胎心音、宫缩情况，保持外阴干洁预防感染，增加营养等，从而适当延长胎龄。

Correct evaluation of the fetal growth in uterus according to B-ultrasound , enhancing the basic nursing during gestation period , watching out for fetal heart rate and uterine contraction , preserving clearness of pudenda , preventing infection and enhancing nutrition can prolong fetus duration .

实验表明，该算法有效地解决了由于胎心率加倍、减半所引起的胎心率曲线翻转问题，提高了多普勒胎心音信号提取的准确性。

It was proved by the experiments that this method improved the veracity of extracting fetal heart and overcame the curve overturn problem in FHR detection . Doppler ;