Leventhal J M, Brown W U, Weiss J B, Alper M H
Obstet Gynecol. 1975 May;45(5):494-500.
A new method of continuous fetal heart rate monitoring, employing for cardiotachometry the fetal electrocardiogram obtained from electrodes placed on the maternal abdomen, was evaluated over a period of 26 months at the Lying-in Division of the Boston Hospital for Women. A total of 2460 hours of intrapartum monitoring were analyzed. This "noninvasive" method of fetal ECG-based monitoring was shown to be as accurate as the direct scalp electrode method and more reliable than indirect ultrasound. Useful fetal monitoring, from very early labor up to the time of delivery, was possible in 91% of 507 patients, using maternal skin electrodes alone. Beat-to-beat variability determinations, possibly of significance in evaluating fetoplacental function in the antepartum period, were precise and without the artifactuality of ultrasonic or phonocardiographic methods.
一种连续监测胎儿心率的新方法，通过放置在孕妇腹部的电极获取胎儿心电图用于心率测定，在波士顿妇女医院产科进行了为期26个月的评估。共分析了2460小时的产时监测数据。这种基于胎儿心电图的“非侵入性”监测方法被证明与直接头皮电极法一样准确，且比间接超声法更可靠。仅使用母体皮肤电极，在507例患者中有91%能够从分娩早期到分娩时进行有效的胎儿监测。逐搏变异性测定在评估产前胎儿胎盘功能方面可能具有重要意义，其结果精确，且没有超声或心音图方法的伪差。
