【摘要】 目的 探讨脐动脉血流图S/D值正常与异常的分界值。方法 应用胎儿脐血流检测仪检测妊娠晚期脐动脉血流1752例，计算各孕周S/D的平均值和标准差，分析正常与异常的界限值，设定值以妊娠36周S/D≥3.0为异常值，每小于1孕周，此值增加0.1，每大于1孕周，此值降低0.1。结果 各孕周间的异常检出率比较稳定，异常检出率为6.8%。结论 应用S/D异常设定值，比单纯以S/D≥3.0或以平均数、标准差计算作为异常值，更有利于临床工作。

    关键词 脐动脉血流图 异常值

    Analysis of normal and abnormal standard values in umbilical artery blood f

    low of1752cases

    Zhang Zaiqing，Li Fasheng

    Department of Obstetrics and Gynaecology，Second People’s Hospital，Shenzhen Guangdong518035.

    【Abstract】 Objective To investigate the S/D unusual boundary value in navel artery blood flow picture.Methods 1752cases of the navel arteries blood flow in later period gestation were detected by foetus’navel blood flow detector.The average value and standard deviation of S/D of every pregnant weeks were calculatd and the unusuˉally demarcation line value were analysed.S/D≥3.0was regarded as the abnormal value of the36 th preganant week.This value increased by0.1with the pregnant weeks decreasing every one week and thus the opposite.Results The unusual checked-out rate6.8%was stable.Conclusion It was more helpful for clinical work with S/D unusual worth than S/D≥3.0simple or with their average or standard deviation as unusual worth. ......