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European Journal of Anaesthesiology:
European Society of Anaesthesiologists; 8th Annual Meeting with the Austrian International Congress; Vienna, Austria, 1-4 April 2000

Preoperative diclofenac vs. paracetamol in tonsillectomy: effects on pain and bleeding

Schmidt, A.; Björkman, S.; Akeson, J.

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Departments of Anaesthesia and Intensive Care, Heisingborg Hospital, Malmo University Hospital and Hospital Pharmacy, Malmo University Hospital, Sweden

Abstract A-609

Background and goal of study: Diclofenac is widely used for postoperative analgesia and has shown opioid-sparing effects, but the perioperative safety of this drug is controversial because of its effect on thrombocytes which might cause increased bleeding. This prospective investigator-blinded study was designed to compare the effects of preoperatively administered diclofenac in comparison to paracetamol on bleeding and pain in patients undergoing tonsillectomy.

Materials and methods: Eighty patients, aged 8-69 years, weighing 40-89 kg, were randomised to receive rectal diclofenac 25, 37.5 or 50 mg corresponding to 0.65-1.0 mg kg−1 or paracetamol 500, 750 or 1000 mg, corresponding to 13-20 mg kg−1 preoperatively. Pain was evaluated during the first 4 h postoperatively using the visual analogue scale (VAS). Pain score ≥4 was treated with meperidine i.v. 0.25 mg kg−1 in incremental doses until acceptable VAS scores were achieved. Perioperative bleeding was evaluated by measuring peroperative blood loss and also by recording drugs used to achieve haemostasis and by the incidence of reoperations.

Results: Pain scores or opioid consumption were not significantly different between the study groups. Anaesthetic and surgical management did not differ except for a significantly longer surgical time in the diclofenac group, 32 ± 16 vs. 25 ± 11 min (P = 0.024). Perioperative bleeding was significantly larger in the diclofenac group than in the paracetamol group, 1.9 (1.1-3.1) vs. 1.1 (0.7-2.0) mL kg−1 (P=0.007).

Conclusions: Rectal diclofenac given preoperatively offers no advantage over paracetamol with respect to postoperative analgesia in patients undergoing tonsillectomy, but instead it increases peroperative bleeding.

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The abstracts published in this supplement have been typeset from camera-ready copies prepared by the authors. Every effort has been made to reproduce faithfully the abstracts as submitted. However, no responsibility is assumed by the organisers for any injury and/or damage to persons or property as a matter of products liability, negligence or otherwise, or from any use or operation of methods, products, instructions or ideas contained in the material herein. Because of the rapid advances in medical sciences, we recommend that independent verification of diagnoses and drug doses should be made.

Acute and chronic pain management

© 2000 European Society of Anaesthesiology

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