Objective to investigate whether a small dose of fentanyl can predict the effectiveness and safety of fentanyl continuous intravenous postoperative analgesia in elderly patients.
目的探讨小剂量芬太尼试验能否预测老年患者芬太尼静脉镇痛的效果和安全性。
Objective to investigate whether a small dose of fentanyl can predict the effectiveness and safety of fentanyl continuous intravenous postoperative analgesia in elderly patients.
目的探讨小剂量芬太尼试验能否预测老年患者芬太尼静脉镇痛的效果和安全性。
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