External Validation of the Apfel Risk Score and Koivuranta Score to Predict Postoperative Nausea and Vomiting in Patients With Liver Cancer

External Validation of Two Models to Predict Postoperative Nausea and Vomiting (PONV) in Patients With Liver Cancer in Chinese Hospital Setting

Postoperative nausea and vomiting (PONV) is a common complication among surgical patients. The incidence ranging from 20% to 50% depends on different population studied. Clinical practice guidelines recommend routine PONV screening before surgery using the Apfel simplified risk score OR Koivuranta score. However, these two scores haven't been translated into Chinese version and tested for psychometric qualities. Therefore, this study aim to externally validate two PONV prediction models in the Chinese hospital setting for PONV assessment.

Inclusion Criteria:

• patients receiving hepatobiliary surgery

Exclusion Criteria:

• patients receiving chemothreapy；patients with cognitive disorders; patients unwilling to participate.