Nitrous oxide-related postoperative nausea and vomiting depends on duration of exposure: More questions than answers

摘要

We have read the recent article by Peyton and Wu1 with great interest, which suggested nitrous oxide-related postoperative nausea and vomiting (PONV) was correlated with the length of time exposed to nitrous oxide. Their excellent meta-analysis on this important subject deserves applause. However, we would like to add some comments to emphasize a few important issues.