对NST判断胎儿宫内健康状况的认识  

NST in Recognition of Fetal Well-being In-utero

作　　者：成黛丽[1] 林永熙[1] 

机构地区：[1]天津市第一中心医院

出　　处：《天津医药》1991年第6期334-336,共3页Tianjin Medical Journal

摘　　要：近年来在世界各国已普及应用无负荷实验 NST 进行围产监护,但由于其假阳性率较高,使产科医生对其监测的可靠程度产生怀疑。本文通过248例 NST 检查结果与临床对照,认为诊断指标应以胎心率的周期性变化为主。在胎动、宫缩和其它外力刺激下胎心加速≥15bpm,持续至少15秒为有反应,无此加速反应为无反应。有反应则意味着胎儿宫内健康状况良好,无反应还应参考第二个重要指标—胎心律基线的变异性和第三个指标—胎心律的减速反应,方可确诊胎儿宫内窘迫。以此标准诊断的假阳性率34.2%,较单以无加速反应即诊断胎儿宫内窘迫的假阳性率76.3%有明显降低。In recent years,non-stress test(NST)has widely been used in many countriesall over the world for perinatal monitoring.But owing to the high false negativerate the accuracy of test was doubted by obstetricians.NST was done in 248 casesand correlated with clinical observations.Diagnostic criteria should mainly be basedon changes of the periodic fetal heart rate,that is under the conditions of fetalmovement,uterine contraction and other passive stimulation,the acceleration offetal beaut rate was≥15bpm,and its persistence of at 1east 15 seconds was consideredas a sign of positive test,without acceleration means negative test.Positive reac-tion was meant by the fetus in-utero in good condition,butin case of negative reac-tion,two points should also be considered:first,variations of baseline of the fetalheart rate and second,the reaction of deceleration of the fetal heart rate.Usingthese diagnostic creteria the false positive rate was 34.2%,much lower than thatwhen the diagnosis was based on non-acceleration reaction alone(76.3%).

关 键 词：胎儿 产前诊断 无负荷试验 

分 类 号：R714.51[医药卫生—妇产科学]