Odendaal H J, Steyn W, Theron G B, Norman K, Kirsten G F
Department of Obstetrics and Gynaecology, Tygerberg Hospital, University of Stellenbosch, South Africa.
Am J Perinatol. 1994 May;11(3):194-8. doi: 10.1055/s-2008-1040744.
The aim of the study was to compare three different fetal heart rate (FHR) patterns, namely, a nonreactive pattern with good long-term variability (fluctuation of 5 or more beats/min), a reactive pattern, and a nonreactive pattern with poor long-term variability (less than 5 beats/min). For this purpose, nonstress tests done less than 24 hours before delivery and FHR patterns recorded during labor were separately assessed. Endpoints for comparison were 5-minute Apgar scores, intrauterine growth retardation, and umbilical blood gas values at birth. Regarding the nonstress test, the prevalence of low 5-minute Apgar scores in reactive, good variability, and in poor variability patterns were 7.2%, 5.3%, and 24%, respectively. The prevalences of small for gestational age newborns were 8%, 17.6%, and 60.6%, respectively. Blood gas values did not differ significantly. Regarding the FHR patterns during labor, using the same sequence, the prevalences of low 5-minute Apgar scores were 3.5%, 6%, and 23%, respectively. Small for gestational age babies occurred in 8.8%, 15.6%, and 80% of the different FHR patterns, respectively. Regarding umbilical artery blood gas values, the only significant difference was a lower pH in the poor variability group. No difference was found between the blood gas values of babies with a reactive pattern and a nonreactive pattern with good variability.
该研究的目的是比较三种不同的胎儿心率（FHR）模式，即具有良好长期变异性（波动为5次或更多次/分钟）的无反应型模式、反应型模式和具有较差长期变异性（小于5次/分钟）的无反应型模式。为此，分别评估了分娩前24小时内进行的无应激试验以及分娩期间记录的FHR模式。比较的终点指标为5分钟阿氏评分、宫内生长迟缓以及出生时脐血气值。关于无应激试验，反应型、良好变异性和较差变异性模式中5分钟阿氏评分低的发生率分别为7.2%、5.3%和24%。小于胎龄新生儿的发生率分别为8%、17.6%和60.6%。血气值无显著差异。关于分娩期间的FHR模式，按照相同顺序，5分钟阿氏评分低的发生率分别为3.5%、6%和23%。小于胎龄儿在不同FHR模式中的发生率分别为8.8%、15.6%和80%。关于脐动脉血气值，唯一显著的差异是较差变异性组的pH值较低。反应型模式的婴儿与具有良好变异性的无反应型模式的婴儿的血气值之间未发现差异。
