两种ＰＨ值利多卡因硬膜外麻醉下剖腹产的效果对照廖淑清，陈燕，程惠琴，刘光槛，江秀华，张小梅，郑秀琴临床一些研究表明，适当提高局麻药ＰＨ值，可显著缩短麻醉起效时间，延长镇痛作用时间，增强麻醉效能［１］，但又有人认为，局麻药加碳酸氢钠后可引起高血药浓度［... Efficacy of two PH values ​​of caesarean section under epidural anesthesia Liao Shuqing, Chen Yan, Cheng Huiqin, Liu Guangsheng, Jiang Xiuhua, Zhang Xiaomei, Zheng Xiuqin Some studies have shown that proper increase in local anesthetic PH value can significantly shorten the onset of anesthesia Time, prolong analgesic effect and enhance anesthetic efficacy [1], but some people think that local anesthetic plus sodium bicarbonate can cause high plasma concentration [...].