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Groene, Philipp; Eisenlohr, Jana; Zeuzem, Catharina; Dudok, Sara; Karcz, Konrad and Hofmann-Kiefer, Klaus (2019): Postoperative nausea and vomiting in bariatric surgery in comparison to non-bariatric gastric surgery. In: Videosurgery and Other Miniinvasive Techniques, Vol. 14, No. 1: pp. 90-95

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Introduction: Postoperative nausea and vomiting (PONV) are complications of general anesthesia. Patient-specific factors, type of surgery and a variety of drugs determine the frequency. Clinical experience shows nausea and vomiting to be very frequent in morbidly obese patients undergoing bariatric surgery. Aim: To detect the onset and extent of nausea and vomiting in the group of morbidly obese patients undergoing laparoscopic bariatric surgery. Material and methods: We conducted a retrospective data bank analysis (since 2004) of all patients with body mass index > 35 kg/m(2) undergoing laparoscopic bariatric surgery in comparison to patients with a body mass index < 35 kg/m(2) undergoing gastric surgery. Propensity score matching was applied to minimize bias effects. The frequency of postoperative nausea was defined as the primary outcome parameter. Results: One hundred and thirty-eight patients were included. There was a significant difference between the morbidly obese group and the control group concerning the frequency of postoperative nausea (15.9% vs. 55.1%;p < 0.001). In patients receiving volatile anesthetics a significant difference between groups concerning frequency of PONV was not observed. Intravenous anesthetics were suitable to reduce PONV in the control group but not in the morbidly obese group (12.5% vs. 56.8%, p < 0.001). With given prophylaxis PONV events still occurred in 15.6% vs. 48.8% (p = 0.003). Conclusions: Morbidly obese patients undergoing laparoscopic bariatric surgery are at higher risk of suffering from PONV than non-morbidly obese patients. To reduce the PONV incidence in morbidly obese patients, further research, especially focusing on more efficient use of antiemetic drugs, seems to be necessary.

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