CLINICAL PRACTICE P 6 acustimulation effectively decreases postoperative nausea and vomiting in high-risk patients †

Methods. Two hundred women undergoing vaginal hysterectomy were enrolled in this prospective, observer-blind, randomized controlled trial. Patients received randomly for 24 h acustimulation (n1⁄4101), subdivided into groups of pre-induction (n1⁄448) and post-induction (n1⁄453), or sham stimulation (n1⁄499), subdivided into groups of pre-induction (n1⁄449) or postinduction (n1⁄450). Nausea and vomiting/retching was recorded for 24 h after operation in the whole group and stratified by risk factors (female gender, non-smoker, history of PONV/ motion sickness, and postoperative morphine usage).