Objective To study the pain relief effectiveness of combined subarachnoid peridural segmental block and simple peridural anesthesia, and their influences on the mothers and the infants.

• 目的探讨采用蛛网膜下腔与硬膜外腔分段阻滞联合用药及单纯硬膜外腔用药法的镇痛效果及其对母婴的影响。