罗哌卡因复合芬太尼吗啡用于硬膜外自控镇痛泵的疗效观察
라고잡인복합분태니마배용우경막외자공진통빙적료효관찰
Therapeutic Effect of Patient Controlled-Epidural Analgesia by Injecting Ropivacaine Fentanyl and Morphine