Willis D C, Blanco J D, Hamblen K A, Stovall D W
Department of Obstetrics and Gynecology, Texas Tech University Health Sciences Center, Lubbock.
J Reprod Med. 1990 Sep;35(9):901-3.
Although the most common definition of a reactive nonstress test is an acceleration in the fetal heart rate of 15 beats per minute (bpm) for 15 seconds, some investigators require that the fetal heart rate acceleration be maintained at 15 bpm above the baseline for the entire 15 seconds (long criterion), and others require simply that the acceleration be 15 seconds from the beginning until the return to the baseline (short criterion). In 1,241 nonstress tests (NSTs) there was a statistically significant difference in the number of reactive tests between the short and long criteria (1,108 [89%] vs. 985 [79%], P less than .001). This difference in percentage of reactivity may be important when comparing studies performed by various investigators. In comparing cesarean section deliveries for fetal distress we were unable to find a difference in the ability to predict a poor outcome between use of the short and long criteria. However, a type II error is possible since the number of poor outcomes was small. We now use the short criterion for NST interpretation.
尽管反应性无应激试验最常见的定义是胎心率每分钟加速15次（bpm）并持续15秒，但一些研究者要求胎心率加速在整个15秒内都维持在基线以上15bpm（长标准），而另一些研究者只要求加速从开始到恢复到基线持续15秒（短标准）。在1241次无应激试验（NST）中，短标准和长标准的反应性试验次数存在统计学显著差异（1108次[89%]对985次[79%]，P小于0.001）。当比较不同研究者进行的研究时，这种反应性百分比的差异可能很重要。在比较因胎儿窘迫而行剖宫产分娩时，我们未能发现使用短标准和长标准预测不良结局的能力存在差异。然而，由于不良结局的数量较少，可能存在II类错误。我们现在使用短标准来解释NST。
