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Ann Thorac Surg 2000;69:1084-1091
© 2000 The Society of Thoracic Surgeons
a Department of Cardiovascular Surgery and Centre de Recherche du Département de Chirurgie, University Hospital of Liège, Liège, Belgium
b Department of Anesthesiology, University Hospital of Liège, Liège, Belgium
Address reprint requests to Dr Defraigne, Department of Cardiovascular Surgery, C.H.U. Liège, Domaine Universitaire du Sart-Tilman, 4000 Liège, Belgium
e-mail: jo.defraigne{at}chu.ulg.ac.be
Background. Cardiopulmonary bypass (CPB) initiates a whole-body inflammatory response where complement and neutrophil activation and cytokine release play an important role. This prospective trial examined the effects of both heparin-coated circuits and aprotinin on the inflammatory processes during CPB, with respect to cytokine release and neutrophil activation.
Methods. Two hundred patients undergoing cardiac surgery were randomized in four groups of 50 patients each: heparin-coated circuit with aprotinin (HCO-A) or without aprotinin (HCO) administration, and uncoated circuit with aprotinin (C-A) or without aprotinin administration (C). In groups receiving aprotinin, a high-dose regimen was given. In all groups, high initial doses of heparin were used (3 mg/kg intravenously). Tumor necrosis factor-
(TNF-), interleukin-6 (IL-6) and IL-8, and myeloperoxidase and elastase levels were measured in plasma samples taken before, during, and after CPB.
Results. In all groups, the TNF-, IL-6, and IL-8 levels reached a maximum after protamine administration. After 24 hours, they remained significantly elevated (IL-6 and IL-8) or returned to baseline values (TNF-). A similar pattern was observed with myeloperoxidase and elastase levels. No significant intergroup differences were observed.
Conclusions. CPB is associated with cytokine release and neutrophil activation, which are not attenuated by the use of heparin-coated circuits or by the administration of aprotinin. Aprotinin and heparin-coated circuits do not show additive effects.
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