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一、宫缩应激试验的方法(一)催产素激惹试验(oxytocin challenge test,OCT):OCT 是预测胎儿宫内窘迫的方法之一,报道较多.此种方法的原理为用催产素诱发宫缩,将胎儿暴露于缺氧的条件下观察胎儿心率的变化,从而了解胎儿胎盘的储备功能.试验前必须观察进行无负荷试验(NST)20分钟.催产素从小剂量(如每分钟1mU)开始逐渐增加,直至每10分钟出现3次宫缩,每次宫缩持续40秒.观察20分钟胎心率-宫缩图(cardiotocogram,CTG).1.适应证 NST 无反应型、高危妊娠及其他检查
First, the method of contractions stress test (a) oxytocin challenge test (OCT): OCT is one of the methods to predict fetal distress, reported more. The principle of this method is the use of oxytocin Induced contractions, the fetal exposure to hypoxia observed changes in fetal heart rate in order to understand the fetal placenta reserve function before the test must be observed for no-load test (NST) 20 minutes Oxytocin from small doses (such as 1mU per minute ) Began to gradually increase until contractions occurred every 10 minutes for 3 times, each contractile for 40 seconds. Observation of fetal heart rate 20 minutes - the uterine contractions (cardiotocogram, CTG) .1 indications NST non-responsive, high-risk pregnancy And other checks