Propofol Versus Dexmedetomidine for Postoperative Nausea and Vomiting in Ureteroscopic Procedures under Spinal Anesthesia: A Randomized, Placebo-Controlled Clinical Trial
-
Maged Elgendy
,
Sahar Ali Marzouk
,
Enas Mohammed Samir
,
Beshoy Atef Nagiub Gendy
,
Sherif Mamdouh Abbas
,
Ahmed Shaker Ragab Ahmed
,
Norhan Abdel Aleem Ali
Abstract
Background: Propofol and dexmedetomidine have a mitigating effect on postoperative nausea and vomiting (PONV). However, their efficacy in preventing PONV in patients following ureteroscopic operations remains uncertain. This study evaluated the efficacy and safety of infusions of dexmedetomidine versus propofol with respect to the incidence of PONV in patients scheduled for ureteroscopic surgeries under spinal anesthesia.
Methods: This randomized controlled trial included 72 adult patients scheduled for ureteroscopic surgery under spinal anesthesia with multiple risk factors for PONV (female, history of PONV, non-smoker). The patients were randomized into three groups (24 patients each). The propofol, dexmedetomidine, and control groups received intravenous infusions of propofol, dexmedetomidine, and normal saline, respectively. The study outcomes were the incidence of PONV (primary outcome) as well as the time and need for antiemetics, Ramsay Sedation Scale, and incidence of intraoperative hemodynamic changes (secondary outcomes).
Results: Dexmedetomidine infusion resulted in significantly lower PONV scores and heart rates during and after surgery compared to the propofol and control groups. Both intervention groups had significantly deeper sedation, but dexmedetomidine was more sedating than propofol (p = 0.001) in comparison to the control group. At 40 and 60 minutes intra- and postoperatively, both the propofol and dexmedetomidine groups had a significant reduction in mean blood pressure in comparison to the control group. Mean blood pressure was similar in the two groups.
Conclusion: During ureteroscopic procedures under spinal anesthesia, dexmedetomidine effectively and safely reduces the incidence of PONV in highly susceptible patients. It also provides deeper sedation and better hemodynamic control compared to propofol.
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