Evaluation of the Rhodes Index of Nausea and Vomiting for ambulatory surgery patients.

Background: The Index of Nausea and Vomiting (INV), developed by Rhodes and others in 1984, measures three dimensions of upper gastrointestinal distress: nausea, vomiting and retching (NVR). While the revised version has been tested with a variety of high-risk populations, there are no data suggesting that it can be used to assess upper gastrointestinal distress among the growing numbers of ambulatory or day surgery patients.

Aim: The aim of this study was to evaluate a modified version of the INV for use with ambulatory surgery patients.