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).
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).
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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