Department of Obstetrics and Gynecology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131-0001, USA.
Am J Perinatol. 2011 Oct;28(9):723-8. doi: 10.1055/s-0031-1280851. Epub 2011 Jun 9.
We evaluated the impact of maternal obesity on the characteristics and results of nonstress tests (NST). This prospective 1-year cohort study included 2026 NSTs performed on 575 consecutively chosen women with singleton gestations ≥ 32 weeks and no known fetal anomalies. Body mass index (BMI) class was determined at the first prenatal visit. The primary outcome was the duration of fetal heart rate monitoring before a reactive result. Obese women were not more likely to have nonreactive NST results. The mean duration before obtaining a reactive result was unaffected by obesity after controlling for diabetes and gestational age. The overall number of NSTs per patient was higher in obese than in nonobese women (3.9 versus 3.1, P < 0.01). More tests per patient are performed among obese subjects, yet the ability to perform an NST and the duration before obtaining a final result were unaffected by obesity.
我们评估了母体肥胖对无应激试验（NST）的特征和结果的影响。这是一项为期 1 年的前瞻性队列研究，纳入了 575 名连续选择的单胎妊娠≥32 周且无已知胎儿畸形的女性的 2026 次 NST。在首次产前检查时确定体重指数（BMI）类别。主要结局是获得反应性结果前的胎儿心率监测持续时间。肥胖女性发生无反应性 NST 结果的可能性并不高于非肥胖女性。在控制糖尿病和孕龄后，获得反应性结果前的平均时间不受肥胖影响。与非肥胖女性相比，肥胖女性的每位患者的 NST 总数更高（3.9 次与 3.1 次，P<0.01）。肥胖患者进行的测试次数更多，但进行 NST 的能力和获得最终结果前的时间不受肥胖影响。
