妊娠晚期不同孕周脐动脉血流S/D异常值标准分析

Investigate the S/D unusual boundary value in navel artery blood flow picture

目的 探讨妊娠晚期不同孕周脐动脉血流图S/D值正常与异常的分界值。方法 应用胎儿脐血流检测仪监测妊娠晚期脐动脉血流1 752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。

Objective To investigate the S/D unusual boundary value in navel artery blood flow picture.Methods 1752 cases of the navel arteries blood flow in later period gestation were detected by fetus' navel blood flow detector.The average value and standard deviation of S/D of every pregnant weeks were calculated and the unusually demarcation line value were analysed.S/D≥3.0 was regarded as the unusual worth of the 36 th pregnant week.This value increased by 0.1 with the pregnant weeks decreasing every one week and thus the opposite.Results The unusual checked-out rate 6.8% was stable.Conclusion It was more helpful for clinical work with S/D unusual worth than S/D≥3.0 simple or with their average or standard deviation as unusual value.