妊娠晚期不同孕周脐动脉血流SD异常值标准分析.doc

【摘要】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≥ 异常值,每小于 1孕周,此值增加 ,每于1 孕周,此值降低 。结果各孕周间的异常检出率比较稳定, 异常检出率为 % 。结论应用 S /D异常设定值, 比单纯以 S /D ≥ 3. 0或以平均、标准差计算作为异常值, 有利于临床工作。【关键词】脐动脉血流图;异常值 Investigate the S/D unusual boundary value in navel artery blood flow picture ZHANG ZaiqingLI Fasheng The Second People's Hospital of Shenzhen518035 【A bstract 】 ObjectiveTo investigate the S/D unusual boundary value in navel artery blood flow cases of the navel arteries blood flow in later period gestation were detected by fetus' navel blood flow average value and standard deviation of S/D of every pregnant weeks were calculated and the unusually demarcation line value were ≥ was regarded as the unusual worth of the 36th pregnant value increased by with the pregnant weeks decreasing every one week and thus the unusual checked-out rate 6. 8% was was more helpful for clinical work with S/D unusual worth than S/D ≥ simple or with their average or standard deviation as unusual value. 【 Key words 】 navel artery blood picture,unusual value 利用超声普勒技术对胎儿胎盘进行血流监测,有利于早期发现胎儿宫内缺氧,及时予以正确处理, 有利于保障围生儿的安全。脐血流收缩末期峰值(S) 与舒张末期峰值(D) 的比值, 是临床最常用的指标, 由于随妊娠周数的增加, 胎盘循环阻力逐渐降低, 舒张末期血流速度增加, S /D比值逐渐下降。由于 S /D异常比值并不具有特定性,确定 S /D值的异常值具有重要的临床