Effect of the preoperative physical status on postoperative nausea and vomiting risk: a matched cohort study

ConclusionThere were differences in intraoperative invasive monitoring and use of vasopressor or inotrope among the classifications, and a score of 3 or higher reduced the risk of postoperative nausea and vomiting more than a score of 1 –2.
Source: Perioperative Medicine - Category: Surgery Source Type: research