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Korean Journal of Anesthesiology 1997;32(1):104-109.
DOI: https://doi.org/10.4097/kjae.1997.32.1.104   
Preemptive Effect of Epidural Fentanyl on Postoperative Pain.
Doo Sik Kim, Gil Soo Ahn, Sie Jeong Ryu, Kyung Han Kim, Tae Ho Jang, Se Hwan Kim
Department of Anesthesiology, Kosin Medical College, Pusan, Korea.
Abstract
BACKGROUND
Preemptive analgesia may prevent nociceptive input generated during surgery from sensitizing central neurons and, therefore, may reduce postoperative pain. The purpose of this study is to examine the effect of epidural fentanyl between preincisional (preemptive) and postincisional groups on postoperative morphine requirements.
METHODS
Sixty patients (ASA physical status 1 or 2) scheduled for elective total abdominal hysterectomy under general anesthesia were allocated randomly to one of two groups and prospectively studied in a double-blind manner. Group 1 received epidural fentanyl(2 g/kg in 15 ml normal saline) before surgical incision followed by epidural normal saline (15 ml) 15 minutes after skin incision. Group 2 received epidural normal saline(15 ml) before surgical incision followed by epidural fentanyl(2 g/kg in 15 ml normal saline) 15 minutes after skin incision. No additional analgesics were used before or during the operation. Postoperative visual analogue pain scores, PCA morphine requirements and side effects were assessed.
RESULTS
Postoperative PCA morphine requirements in preincisional group were significantly less (p<0.05) than those in postincisional group between 6 and 24 hours postoperatively. VAPS was also significantly less (p<0.05) in preemptive group than in postincisional group 12 hours after surgery.
CONCLUSIONS
Preemptive analgesia with epidural fentanyl is more effective in reducing the postoperative morphine requirements and VAPS than analgesia with postincisional epidural fentanyl in patients with total abdominal hysterectomy.
Key Words: Analgesia postoperative; preemptive; Analgesics fentanyl; Anesthetic technique epidural


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