Geraci J F, Chez R A, Fuentes A
Department of Obstetrics and Gynecology, University of South Florida, Tampa, USA.
J Matern Fetal Med. 1997 Sep-Oct;6(5):281-4. doi: 10.1002/(SICI)1520-6661(199709/10)6:5<281::AID-MFM8>3.0.CO;2-C.
We tested the hypotheses that fetal heart rate decelerations are present during the third trimester in most low risk pregnant women, the prevalence of decelerations is a function of the length of time fetal heart rate monitoring occurs and their presence is not associated with an adverse prognosis. We performed a retrospective chart review of 114 self-referred low-risk pregnant patients who presented to the labor and delivery triage area of a tertiary care hospital at 26-41 weeks gestation. None required admission to the hospital. The control group consisted of patients who delivered immediately before and after the delivery of the study patient. Normal long-term variability and fetal baseline heart rate were found in all electronic fetal monitoring tracings. Accelerations were present in 91% and decelerations in 65% of patients. There was no correlation between length of time of monitoring and the incidence of decelerations. At delivery, there were no differences in birthweight, gestational age, 5-min Apgar scores or cord pH between the control and study patients. Variable decelerations were a common finding in the third trimester of low-risk pregnant patients who self referred to labor and delivery triage. They were not prognostic of an adverse perinatal outcome.
大多数低风险孕妇在孕晚期会出现胎儿心率减速，减速的发生率是胎儿心率监测时长的函数，且其出现与不良预后无关。我们对114名自我转诊的低风险孕妇进行了回顾性病历审查，这些孕妇在妊娠26 - 41周时前往一家三级护理医院的 labor and delivery triage area就诊。无一例需要住院治疗。对照组由在研究对象分娩前后立即分娩的患者组成。所有电子胎儿监护记录均显示正常的长期变异性和胎儿基线心率。91%的患者出现加速，65%的患者出现减速。监测时长与减速发生率之间无相关性。分娩时，对照组和研究对象在出生体重、孕周、5分钟阿氏评分或脐血pH值方面无差异。可变减速在自我转诊至 labor and delivery triage的低风险孕妇孕晚期很常见。它们并非围产期不良结局的预后指标。
