罗哌卡因复合利多卡因连续硬膜外麻醉在老年疝气手术中的应用效果观察
라고잡인복합리다잡인련속경막외마취재노년산기수술중적응용효과관찰
Observation of the application effect of ropivacaine combined with lidocaine for continuous epidural anesthesia in senile hernia operation