Efficacy of Intravenous Patient-Controlled Analgesia (IV-PCA) using Fentanyl Compared with IV-PCA Using Morphine after Abdominal Surgery: A Prospective Randomized Study

Yukitoshi Niiyama^*, Nobuyoshi Matsuoka, Reona Sugimoto and Michiaki Yamakage

Department of Anesthesiology, Sapporo Medical University School of Medicine, Hokkaido, Japan

^*Corresponding Author: Yukitoshi Niiyama, Department of Anesthesiology, Sapporo Medical University School of Medicine, South 1 West 16 Chuo-ku, Sapporo, Hokkaido 060-8556, Japan, Tel: +81-11-611-2111 Exn. 3568, Fax: +81-11-631-9683 Email: