布比卡因复合舒芬太尼腰-硬联合麻醉在老年下肢骨折手术中的应用
포비잡인복합서분태니요-경연합마취재노년하지골절수술중적응용
The bupivacaine combined with sufentanil application in spinal-epidural anesthesia of the elderly lower limb fracture surgery
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