轻比重腰麻联合硬膜外阻滞用于老年股骨颈骨折手术患者的麻醉体会
경비중요마연합경막외조체용우노년고골경골절수술환자적마취체회
Application of hypobaric spinal anesthesia comblined epidurial block applied to elder femoral neck fracture
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