How effective is P6 acupoint stimulation of the wrist in preventing postoperative nausea and vomiting (PONV)?
The quality of the included trials was variable. In 34 trials, the allocation concealment was unclear, and in 1 trial it was inadequate. Patients were not blinded in 1 study. There was no blinding of healthcare providers in 2 studies. The outcome assessor was not blinded in 2 studies. Twelve trials did not report all outcomes. There was 1 study with a low risk of bias. Of the 16 studies with a high risk of bias, 12 of these were due to selective reporting. The risk of bias in the remaining 23 studies was unclear.
Postoperative nausea and vomiting (PONV) are two of the most common complications after anaesthesia and surgery. Drugs are only partially effective in preventing PONV and may cause adverse effects.