目的研究麻醉诱导前扩容对腹腔镜手术后恶心呕吐（PONV）发生率的影响。

Objective To investigate the effects of volume expansion before induction of anaesthesia on postoperative nausea and vomiting(PONV) in patients undergoing laparoscopic operations.

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但是由于这类疝气可能在在术后的几年里不发生问题，病人可能会因疼痛或恶心、呕吐看急诊而不去怀疑这类原因。

But because the hernias may not cause a problem until years after the surgery, patients may show up at an emergency room complaining of pain or nausea without suspecting the source of the problem.

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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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