Keane M W, Horger E O, Vice L
Obstet Gynecol. 1981 Mar;57(3):320-4.
During an 18-month period 1328 nonstress tests (NST) and sequential contraction stress tests (CST) were performed on 566 patients. The criterion for reactivity was at least 2 accelerations associated with fetal movement during 20 minutes. The last test performed within 1 week of delivery was compared with perinatal outcome. A total of 1118 (84.2%) NSTs were reactive, and 210 (15.8%) were nonreactive. Of the CSTs 1249 (94.1%) were negative, 52 (3.9%) were positive, 16 (1.2%) were equivocal, and 11 (0.8%) were unsatisfactory. The correlation between a reactive NST and a negative CST was excellent (99.4%), whereas that between a nonreactive NST and a positive CST was poor (24.8%). Although the CST proved to be a better predictor of morbidity than the NST, both tests are highly significant predictors (P less than .001). Fetuses exhibiting both a nonreactive NST and a negative sequential CST are at no increased risk for morbidity. This study supports the concept that a precisely defined NST is an adequate screening tool for the evaluation of high-risk pregnancies.
在18个月的时间里，对566例患者进行了1328次无应激试验（NST）和连续宫缩应激试验（CST）。反应性的标准是在20分钟内至少有2次与胎动相关的加速。将分娩前1周内进行的最后一次检查与围产期结局进行比较。共有1118次（84.2%）NST反应性良好，210次（15.8%）无反应。在CST中，1249次（94.1%）为阴性，52次（3.9%）为阳性，16次（1.2%）为可疑，11次（0.8%）不满意。反应性NST与阴性CST之间的相关性极佳（99.4%），而无反应性NST与阳性CST之间的相关性较差（24.8%）。尽管CST被证明比NST更能预测发病率，但两种检查都是高度显著的预测指标（P<0.001）。NST无反应且连续CST为阴性的胎儿发病风险并未增加。本研究支持这样一种观念，即精确界定的NST是评估高危妊娠的一种充分的筛查工具。
