生物节律对分娩镇痛孕妇分娩方式的影响

Influence of biological rhythm on delivery mode of pregnant women receiving analgesia

目的探索生物节律对分娩镇痛孕妇分娩方式的影响。方法 2051例拟阴道分娩的头位、单胎、足月、自发宫缩进入产程并且接受了硬膜外分娩镇痛的初产妇纳入本研究。根据分娩时间分为上午组(7:01-13:00)、下午组(13:01-19:00)、晚上组(19:01-1:00)和凌晨组(1:01-7:00),观察各组分娩方式及新生儿情况。结果①4组间的年龄、身高、体质量、妊娠周数、妊娠期合并症等差异无统计学意义(P>0.05);②4组间的分娩方式有统计学差异(P<0.01),晚上组剖宫产率高于其他各组(P<0.05);③下午组和晚上组新生儿的体质量较高,而上午组和凌晨组较低。结论生物节律对孕妇的分娩方式可能有影响,晚上时段剖宫产率更高。

Objective To study the effect of biological rhythm on delivery mode. Methods In this retrospective cohort study,2 051 nulliparas with term singleton cephalic pregnancy who were in spontaneous labor and preparing to deliver vaginally and received epidural analgesia were included. The parturients were divided into four groups according to the delivery time,i. e.,morning group（ 7： 01 to 13： 00）,afternoon group（ 13： 01 to 19： 00）,evening group（ 19： 01to 1： 00）,and night group（ 1： 01 to 7： 00）. The delivery mode and parameters were compared among the four groups.Results ①No significant differences on maternal demographic factors including age,height,weight,gestational age and pregnancy complications were found among the four groups（ P 〉0. 05）. ②Significant difference was shown among the four groups in delivery mode（ P〈 0. 01）. The rate of cesarean section was significantly higher in night group than in the other groups（ P 〈0. 05）. ③Neonatal birth weight was higher in afternoon and evening groups than in morning and night groups. Conclusion Biological rhythm seems to influence the delivery mode,and the rate of cesarean section is the highest in evening periods.