Canadian Journal of Anesthesia, Vol 41, 98-101, Copyright © 1994 by Canadian Anesthesiologists' Society

ARTICLES

Preoperative naproxen sodium reduces postoperative pain following arthroscopic knee surgery

WE Code, RW Yip, ME Rooney, PM Browne and T Hertz
Department of Anaesthesia, Royal University Hospital, Saskatoon, Saskatchewan.

This study was undertaken to assess the efficacy of a single preoperative dose of naproxen sodium in reducing postoperative pain and length of day surgery stay in patients undergoing arthroscopic knee surgery. A randomized, double-blind clinical trial was carried out on 66 ASA I and ASA II patients scheduled for arthroscopic knee surgery. The treatment group (n = 26) received two capsules containing 275 mg of naproxen sodium each, and the control group (n = 40) received placebo. Preoperative and postoperative visual analogue pain scores, postoperative analgesic requirements in hospital as well as 24 hr after discharge, and length of day surgery stay were studied. There was a decrease in postoperative pain, both in hospital (naproxen 0.7 +/- 1.2 vs placebo 2.2 +/- 2.3) and at 24 hr after discharge (naproxen 0.8 +/- 1.9 vs placebo 3.8 +/- 3.2) (P = 0.0001). There was no difference in the need for in-hospital postoperative analgesics or in the time to discharge. However, there was a difference in the use of analgesics after discharge (naproxen group 30.4% vs placebo group 71.4%) (P < 0.01). The results of this study suggest that a single preoperative dose of 550 mg naproxen sodium is effective in reducing postoperative pain in arthroscopic knee surgery, both in the immediate postoperative period and for up to 24 hr after the completion of surgery.

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