小剂量轻比重布比卡因腰硬联合麻醉用于老年人下肢骨折手术的分析
소제량경비중포비잡인요경연합마취용우노년인하지골절수술적분석
Analysis of combined spinal-epidural anesthesia with Bupivacaine with low-dose and light weight fluid in the application of elderly lower limb fracture surgery
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