小容量高浓度罗哌卡因硬膜外阻滞复合全麻用于老年患者腹部外科手术
소용량고농도라고잡인경막외조체복합전마용우노년환자복부외과수술
Epidural block with ropivacaine of small capacity and high concentrations combined with general anesthesia for elderly patients undergoing abdominal surgery
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