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自30年代中期Minnitt介绍Minnitt气体和空气镇痛装置以来,间歇自我管理笑气(N_2O)已广泛流行。Entonox(50％N_20和O_2)对约50％母亲分娩时提供良好吸入镇痛,应用简单安全性高,睏倦发痫率低,适于分娩。近来报道在供氧下连续吸入0.2％～0.75％异氟醚,尤其在第一产程宫缩时,间歇给0.75％异氟醚加氧比Entonox镇痛好。为确定第一产程时间歇自我管理Entonox加0.2％异氟醚是否比单用Entonox镇痛较好,而且不明显增加睏倦,选择年龄16～38岁,ASAI级,正常分娩需吸入镇痛者随机分为两组,用两种方法给药,在3小时完成。组1(E—I—E系列)母亲在第1小时单用Entonox,第2小时用Entonox
Since the mid-1930s Minnitt introduced Minnitt gas and air analgesia devices, intermittent self-management of nitrous oxide (N2O) has become widespread. Entonox (50% N_20 and O_2) provides good inhalation and analgesia to about 50% of mothers during childbirth, with simple and safe use and low incidence of sleep-induced seizures, suitable for childbirth. Recently reported continuous inhalation of oxygen 0.2% to 0.75% isoflurane, especially in the first stage of labor contractions, intermittent to 0.75% isoflurane oxygen better than Entonox analgesic. In order to determine whether the first stage of labor self-management Entonox plus 0.2% isoflurane analgesia better than Entonox alone, but no significant increase in sleepiness, select the age of 16 to 38 years old, ASAI grade, normal delivery should be inhaled analgesia were randomized Divided into two groups, administered by two methods, completed in 3 hours. Group 1 (E-I-E series) mothers used Entonox for the first hour only, Entonox for the second hour