分娩笑气镇痛胎儿监护图形分析

目的探讨临产孕妇笑气吸入使用后胎儿电子监护的图形特征及其临床意义。方法将149例37孕周以上单胎、无高危因素孕妇分为试验组70例和对照组79例。试验组在产程中吸入50%笑气与50%氧气的混合气体实行分娩镇痛;对照组未使用任何药物镇痛。两组均进行全程胎心监护,分析胎心宫缩图(cardio-tocography,CTG)图形特征,合并症及分娩结局。结果对比两组孕妇CTG异常图形发现,试验组胎心基线变异减弱或消失、变异减速、晚期减速和异常胎心率水平(胎儿心动过速和心动过缓)发生率无差异。新生儿窒息发生率无差异,试验组剖宫产率低于对照组。结论50%笑气与50%氧气的混合气体用于分娩镇痛是产科人性化服务的重要内容之一,笑气吸入后CTG图形特征无异常改变,对胎儿中枢神经系统调节功能无明显影响。

Clinical Analysis of Electronic Fetal Heart Rate Monitoring System with Inhalation of 50 % Nitrous Oxide in Oxygen

Objective Electronic fetal heart rate monitoring system of efficacy and safety of labor analgesia with inhalation of 50% nitrous oxide in oxygen were investigated. Methods A total of 149 cases of primiparous women at term were divided into two groups. Researched group (n=70) gained inhalation of 50% nitrous oxide in oxygen for relieving labor pain during parturition. Control group (n=79) received intermittent inhalation of oxygen. Two groups were electronic fetal monitoring . The Cardiotocography (CTG), outcome of labor of both groups was analyzed.Results The incidence of abnormal CTG and neonatal asphyxia rate in two group was not difference . Rate of cesarean section in researched group was lower than control group .Conclusion Labor analgesia with inhalation of 50% nitrous oxide in oxygen was safe and effective.