不同剂量舒芬太尼复合左布比卡因蛛网膜下腔阻滞在老年人工股骨头置换术中的应用
불동제량서분태니복합좌포비잡인주망막하강조체재노년인공고골두치환술중적응용
The application of different dosages of Sufentanil added to Levobupivacaine subarachnoid block in agedness undergone artificial femoral head replacement
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