The effect of different surgery positions on postoperative nausea and vomiting induced due to chemical anesthesia

Risk factors related to postoperative nausea and vomiting (PONV) affect the patient’s health; however, most of these multi-factorial risks are unknown. The current study aimed to investigate unknown factors associated with PONV as well as the effect of different positions during surgery on postoperative nausea and vomiting. In this study, 180 patients are scheduled for elective orthopedic surgery during 2018 is investigated. Patients were divided into two groups, with 90 subjects. In the recovery unit, the incidence of nausea and vomiting in each group was recorded based on the position during surgery. The highest and lowest prevalence of nausea was in the supine position (43.66%) and sitting position (15.49%) groups, respectively. The duration of recovery stay (P 0.05), the severity of nausea (P 0.05), and the need for anti-antiemetic drugs (P 0.05) had a significant effect on the incidence of nausea in all positions. Also, the highest prevalence of vomiting was in the supine position group (21.11%). While the lowest prevalence of nausea was in the lateral position group (4.43%). The severity of nausea (P 0.05) and need for Antiemetic drugs (P 0.05) had a significant effect on the incidence of vomiting in all positions. Based on the findings, the supine position is a risk factor for nausea and vomiting. Also, for female obese patients, the sitting position is a risk factor, and it’s better to be avoided.