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目的探讨不同孕周(特别是孕41周后)胎儿左心室Tei指数及其临床应用价值。方法对317例胎儿按孕周分为晚期妊娠组(孕周<42周:28~36+6周,37~40+6周,41~41+6周)和过期妊娠(孕周≥42周),后者又分过期妊娠组1(各项检查均正常)、过期妊娠组2(伴胎心监护异常或/和B超提示S/D比值异常或/和羊水过少)。应用彩色多普勒超声心动图检测各组左心室等容时间、射血分数,计算Tei指数。结果晚期妊娠组各孕周胎儿左心室Tei指数差异无统计学意义(P>0.05)。过期妊娠各组中,胎儿左心室Tei指数均较晚期妊娠组显著增高(P<0.05);而过期妊娠组2与过期妊娠组1比较,胎儿左心室Tei指数明显增高(P<0.05)。结论胎儿Tei指数是一种简单可靠的定量评价过期妊娠胎儿心功能的指标。
Objective To investigate the Tei index of left ventricular in different gestational weeks (especially after 41 weeks of gestation) and its clinical value. Methods Thirty-seven fetuses were divided into late pregnancy group (gestational week <42 weeks: 28-36 + 6 weeks, 37-40 + 6 weeks, 41-41 + 6 weeks) and expired pregnancy ), The latter is divided into an outdated pregnancy group 1 (all tests were normal), outdated pregnancy group 2 (with abnormal fetal heart rate monitoring or / and B-ultrasound prompted an abnormal S / D ratio or / and oligohydramnios). Color Doppler echocardiography was used to detect left ventricular isovolumic time and ejection fraction in each group, and Tei index was calculated. Results There was no significant difference in Tei index of fetal left ventricular between gestational weeks and late pregnancy (P> 0.05). The Tei index of fetal left ventricle was significantly higher than that of advanced pregnancy group (P <0.05) in all groups of expired pregnancy, while the Tei index of fetal left ventricle was significantly higher in expired pregnancy group 2 and expired pregnancy group 1 (P <0.05). Conclusion The Fetal Tei Index is a simple and reliable quantitative evaluation of fetal heart function in obese children.