Arias J W, Saldana L R, Rivera-Alsina M, Ali V
Obstet Gynecol. 1982 Oct;60(4):427-30.
The nonstress test (NST) was used as the primary tool in the management of 318 high-risk pregnancies. A simple and reliable method for interpreting the NST is obtained by dividing the total number of fetal heart rate accelerations associated with fetal movements by the total number of fetal movements. This is expressed as a percentage called the acceleration:fetal movement ratio. Fetuses at risk who were delivered within 7 days of the last NST from the basis of this report. The incidence of fetal distress and small-for-gestational-age infants was significantly higher (P less than .05) in 47 fetuses with an acceleration:fetal movement ratio below 10% than in the group with a ratio over 10%. Also, perinatal mortality was more common in this group. The advantages and limitations of applying this quantitative method of interpreting the NST to the management of high-risk pregnancies are discussed.
无应激试验（NST）被用作管理318例高危妊娠的主要手段。一种简单可靠的NST解读方法是，将与胎动相关的胎儿心率加速总数除以胎动总数。这以百分比形式表示，称为加速：胎动比值。根据本报告，处于高危状态的胎儿在末次NST后7天内分娩。加速：胎动比值低于10%的47例胎儿中，胎儿窘迫和小于胎龄儿的发生率显著更高（P<0.05），高于比值超过10%的组。此外，该组围产期死亡率更常见。讨论了将这种定量解读NST的方法应用于高危妊娠管理的优点和局限性。
