Many patients undergoing gynecologic laparoscopic surgery experience postoperative nausea and vomiting (PONV) despite prophylaxis and treatment with HT3 receptor antagonists such as ondansetron. Involvement of multiple types of receptors and factors may be a reason for inadequate control of PONV with a single agent. Betahistine, a histamine antagonist at H1 receptor and antagonist at H3 receptor, is widely used as a treatment of dizziness. Dizziness is one of the cause of nausea and vomiting. This study is to compare the effects of ondansetron and combined ondansetron and betahistine in preventing PONV in high-risk patients receiving intravenous opioid-based patient-controlled analgesia (IV-PCA) after gynecological laparoscopic surgery.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
168
The ondansetron group is given placebo (pyridoxin) instead of betahistine. The ondansetron group is given ondansetron 4 mg bolus at the end of surgery and ondansetron 8 mg added to the IV-PCA.
The ondansetron-betahistine group is given betahistine 18mg orally in the morning of surgery and postoperative day 1. The ondansetron-betahistine group is given ondansetron 4 mg bolus at the end of surgery and ondansetron 8 mg added to the IV-PCA.
Department of Anesthesiology and Pain Medicine, Yonsei University College of Medicine
Seoul, South Korea
postoperative nausea and vomiting
evaluation of nausea and vomiting with verbal rating scale (VRS, 0, no nausea; 10, worst imaginable nausea)
Time frame: at postoperative 24h
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