术后恶心呕吐的发病机制不明，药物治疗效果欠佳，非药物治疗如针灸治疗有一定的疗效，但其作用机制尚不明确。
The mechanism of postoperative nausea and vomiting(PONV)is not clear. Pharmacotherapy is not good enough for PONV, and acupuncture has some effect on PONV though mechanism was not clear also.
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.
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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