Objective To provide basis for nursing of patient controlled intravenous analgesia (PCIA).

目的为静脉自控镇痛(PC IA)的护理提供依据。

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Objective To observe the efficacy and safety of ramosetron for preventing nausea and vomiting during postoperative patient controlled intravenous analgesia(PCIA).

目的观察雷莫司琼预防术后患者自控静脉镇痛（PCIA）期间恶心呕吐的防治效果及安全性。

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Objective to analyse the influencing factors for patient-controlled intravenous analgesia (PCIA) by infusing fentanyl and improve the effect of postoperative pain relief.

目的探讨影响芬太尼病人自控静脉镇痛(PCIA)的因素，提高术后镇痛效果和质量。

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