Postoperative nausea and vomiting (PONV) is one of the most common postoperative complications. Aside from pharmacological interventions, other complementary healing modalities have been introduced to assist patients in decreasing PONV and improving postoperative outcomes.Postoperative nausea and vomiting (PONV) is an unpleasant complication affecting about a third of the 10% of the population undergoing general anaesthesia each year. This equates to about two million people in the United Kingdom annually.Alternative methods, such as stimulating an acupuncture point on the wrist (P6 acupoint stimulation), have been studied in many trials. The use of P6 acupoint stimulation can reduce the risk of nausea and vomiting after surgery, with minimal side effects. The risks of postoperative nausea and vomiting were similar after P6 acupoint stimulation and antiemetic drugs.

To determine the efficacy and safety of P6 acupoint stimulation in preventing PONV,Cochrane Anaesthesia Group Has done a review about this, all randomized trials of techniques that stimulated the P6 acupoint compared with sham treatment or drug therapy for the prevention of PONV. Interventions used in these trials included acupuncture, electro‐acupuncture, transcutaneous nerve stimulation, laser stimulation, capsicum plaster, an acu‐stimulation device, and acupressure in patients undergoing surgery. Primary outcomes were the risks of nausea and vomiting. Secondary outcomes were the need for rescue antiemetic therapy and adverse effects.

They found that P6 acupoint stimulation prevented PONV. There was no reliable evidence for differences in risks of postoperative nausea or vomiting after P6 acupoint stimulation compared to antiemetic drugs.

Refrence:Citation: Lee A, Fan LTY. Stimulation of the wrist acupuncture point P6 for preventing postoperative nausea and vomiting. Cochrane Database of Systematic Reviews 2009, Issue 2.

Another research:confirmed the effectiveness of acupressure in preventing post-operative nausea and vomiting, when applied 30 minutes prior to surgery.(Acta Med Iran. 2013 Apr 6;51(3):163-7.)