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目的探讨评价正常胎儿心功能的实用方法。方法2006年11月至2007年6月在上海市国际和平妇幼保健院选取100例22～34岁正常孕妇的胎儿[胎龄20～40周,平均(28.4±4.5)周],按孕周分为4组,分别取得左、右心房室瓣和大动脉瓣口脉冲多普勒血流频谱,测量相应时间间期和当时心率,用平均心率进行校正,计算左、右心室Tei指数。结果Tei指数在每例胎儿均成功测得,各组均符合正态分布。左、右心室Tei指数分别为0.311±0.069和0.296±0.074,在整个中、晚孕期保持稳定,不随孕周的增加而变化(P>0.05),与胎心率亦无相关性(P>0.05)。结论测量胎儿心室Tei指数时,经平均心率校正后的脉冲多普勒是一种简便、准确、重复性好的方法,确立Tei指数正常值可使其有效应用于产科胎儿监测。
Objective To explore a practical method of evaluating normal fetal heart function. Methods From November 2006 to June 2007, 100 fetuses of normal pregnant women aged from 22 to 34 (gestational age 20 to 40 weeks, mean (28.4 ± 4.5) weeks) were enrolled in Shanghai International Peace Maternity and Child Care Hospital. The gestational weeks The left and right atrial and aortic valve pulsatile Doppler flow spectra were obtained for 4 groups. The corresponding time interval and the current heart rate were measured. The mean heart rate was used to calculate the left and right ventricular Tei index. Results Tei index was successfully measured in every fetus, and all groups were in normal distribution. The Tei index of the left and right ventricle were 0.311 ± 0.069 and 0.296 ± 0.074 respectively, which remained stable throughout the first trimester and the second trimester without changing with the gestational age (P> 0.05) ). Conclusions Pulse Doppler after correction of mean heart rate is a simple, accurate and reproducible method for measuring fetal ventricular Tei index. The establishment of normal Tei index can be effectively applied to obstetric fetal monitoring.