• J Mantz, C M Samama, F Tubach, P J Devereaux, J-P Collet, P Albaladejo, B Cholley, R Nizard, J Barré, V Piriou, N Poirier, A Mignon, S Schlumberger, D Longrois, F Aubrun, M E Farèse, P Ravaud, P G Steg, and Stratagem Study Group.
• APHP, Hôpital Beaujon, Service d'Anesthésie Réanimation et SMUR, Clichy F-92110, France. jean.mantz@bjn.aphp.fr
• Br J Anaesth. 2011 Dec 1;107(6):899-910.

BackgroundPatients receiving anti-platelet agents for secondary cardiovascular prevention frequently require non-cardiac surgery. A substantial proportion of these patients have their anti-platelet drug discontinued before operation; however, there is uncertainty about the impact of this practice. The aim of this study was to compare the effect of maintenance or interruption of aspirin before surgery, in terms of major thrombotic and bleeding events.MethodsPatients treated with anti-platelet agents for secondary prevention and undergoing intermediate- or high-risk non-cardiac surgery were included in this multicentre, randomized, placebo-controlled, trial. We substituted non-aspirin anti-platelets with aspirin (75 mg daily) or placebo starting 10 days before surgery. The primary outcome was a composite score evaluating both major thrombotic and bleeding adverse events occurring within the first 30 postoperative days weighted by their severity (weights were established a priori using a Delphi consensus process). Analyses followed the intention-to-treat principle.ResultsWe randomized 291 patients (n=145, aspirin group, and n=146, placebo group). The most frequent surgical procedures were orthopaedic surgery (52.2%), abdominal surgery (20.6%), and urologic surgery (15.5%). No significant difference was observed neither in the primary outcome score [mean values (SD)=0.67 (2.05) in the aspirin group vs 0.65 (2.04) in the placebo group, P=0.94] nor at day 30 in the number of major complications between groups.ConclusionsIn these at-risk patients undergoing elective non-cardiac surgery, we did not find any difference in terms of occurrence of major thrombotic or bleeding events between preoperative maintenance or interruption of aspirin.

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