Effect of Intravenous Patient-controlled Analgesia (IV-PCA) With Fentanyl in Adults for Acute Postoperative Pain Control

In this retrospective study, the investigators examined incidence and risk factors of postoperative nausea and vomiting (PONV) in patients with fentanyl-based intravenous patient-controlled analgesia (IV-PCA).

Inclusion Criteria:

1. Adults between 20 to 60 years old
2. Date from 1st, May 2011 to 31st, October 2011
3. Patients with fentanyl based intravenous patient-controlled analgesia for postoperative pain control

Exclusion Criteria:

1. Reoperation within 48 hours
2. Patients who cannot express numerical rating scale for pain due to sedation