不同剂量鞘内吗啡注射用于初产妇剖宫产手术镇痛效果及不良反应

鞘内注射不同剂量吗啡用于初产妇术后镇痛，观察最适吗啡剂量Intrathecal administration of varying doses of morphine for postoperative analgesia in primiparous women to determine the optimal morphine dosage