• Hideki Taniguchi, Mari Nagahuchi, Takaaki Kamada, Kikuko Suga, Tomoyuki Sato, Tomomi Ueda, and Tatsuo Yamamoto.
• Perioperative Support Center, Saiseikai Yokohamashi Tobu Hospital, 3-6-1 Shimo-Sueyoshi, Tsurumi-Ku, Yokohama, Kanagawa, 230-8765, Japan. hstani@aol.jp.
• J Anesth. 2020 Aug 1; 34 (4): 502-511.

PurposeThe aim of this study was to assess the effect of scheduled intravenous acetaminophen (SIVA) on the incidence of postoperative nausea and vomiting (PONV) in patients undergoing laparoscopic gynecologic surgery (LGS).MethodsThis retrospective observational study identified consecutive patients who underwent LGS at our institution from January to November of 2017 and were managed with either our hospital's old protocol (Group H) or a new protocol using SIVA (Group S). Primary outcomes included the incidences of PONV and the amount of additional antiemetic required in the postoperative period. The secondary outcomes included the pain score on postoperative day 1, the requirement for additional analgesic medications, and the length of hospitalization (LOH).ResultsPatients in Group S had significantly lower incidences of PONV from postoperative days 0 to 1 and required significantly less antiemetics or tramadol than those in Group H (P = 0.0085). Patients at a low risk for PONV in Group S had significantly lower incidences of PONV than those in Group H (P = 0.0129). Further, the amount of additional tramadol required was lower in Group S than in Group H (P = 0.0021).ConclusionIntroduction of SIVA into the postoperative pain management protocol of LGS may reduce the incidence of PONV and the amount of adjunctive antiemetic medication required from postoperative days 0 to 1. In patients undergoing LGS, PONV prophylaxis using antiemetics should be prescribed depending on PONV risk profile; however, SIVA prophylaxis can be used in all patients regardless of PONV risk profile.

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