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Randomized Controlled Trial Comparative Study Clinical Trial
Intra-articular morphine and clonidine produce comparable analgesia but the combination is not more effective.
- M Gentili, P Houssel, M Osman, D Henel, A Juhel, and F Bonnet.
- Clinique Saint Vincent, Rennes, France.
- Br J Anaesth. 1997 Nov 1;79(5):660-1.
AbstractBoth intra-articular morphine and clonidine produce analgesia. This study was designed to compare the analgesic effects of the two drugs, used separately and in combination. We studied 90 patients undergoing arthroscopy of the knee under general anaesthesia. Patients were allocated randomly to receive 20 ml of intra-articular isotonic saline solution containing morphine 2 mg, clonidine 150 micrograms or both. Pain was assessed on an visual analogue scale after operation and time for rescue medication was measured. There was no difference in VAS scores between the three groups and the time for rescue analgesic was comparable. We conclude that intra-articular morphine and clonidine have comparable analgesic effects in the doses used. The combination of both drugs did not seem to increase analgesia.
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