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Postoperative nausea and vomiting is a major cause of postoperative morbidity. It can lead to increased recovery time, delaying patient discharge and an increase in hospital costs. Past studies have shown that postoperative nausea and vomiting is more frequent in women than men, appears to elevate around the time of menarche and is reduced around the time of menopause. This retrospective review of a one-year experience of laparoscopic tubal ligation at our institute examined the effect of menstrual cycle on postoperative nausea and vomiting. The anaesthetic and surgical techniques were consistent for all patients. Patient data included age, weight, last day of menstrual cycle, the length of anaesthetic, the dose of inhalational agent, the dose of narcotic, emesis on emergence and whether or not droperidol was used. Of the the 235 patients in the study, the incidence of nausea and vomiting was 28%. One hundred fifty-eight had had no preoperative antiemetic and 77 had received droperidol. These two groups were analyzed separately. The incidence in the group not receiving droperidol was 33.5% and in the droperidol group, 16.9% (P less than 0.01). The incidence of nausea and vomiting was higher on the first eight menstrual days (51.6 vs 21.6, P less than 0.001), was highest on day five of the menstrual cycle and lowest on days 18, 19, and 20 where there was no nausea and vomiting. Droperidol reduced the incidence of postoperative nausea and vomiting but the variation in postoperative nausea and vomiting during the cycle persisted.(ABSTRACT TRUNCATED AT 250 WORDS)

The incidence of postoperative nausea and vomiting in women undergoing laparoscopy is influenced by the day of menstrual cycle