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。

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

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目的观察恩丹西酮对乳腺癌根治术后曲马多病人自控静脉镇痛(PCIA)疗效的影响。

Objective to investigate the effect of ondansetron on the analgesic efficacy of tramadol for postoperative patient-controlled intravenous analgesia (PCIA).

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实验组采用静脉自控镇痛法术后镇痛；对照组采用传统镇痛法术后镇痛。

The patients in the experimental group used the PCIA, while the patients in the control group used the traditional analgesia.

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