• Lena Lindholm, Martin Westerberg, Anders Bengtsson, Rolf Ekroth, Eva Jensen, and Anders Jeppsson.
• Department of Cardiothoracic Surgery, Sahlgrenska University Hospital, Gothenburg, Sweden.
• Ann. Thorac. Surg. 2004 Dec 1;78(6):2131-8; discussion 2138.

BackgroundCardiopulmonary bypass induces a systemic inflammatory and hemostatic activation, which may contribute to postoperative complications. Our aim was to compare the inflammatory response, coagulation, and fibrinolytic activation between two different perfusion systems: one theoretically more biocompatible with a closed-circuit, complete heparin coating, and a centrifugal pump, and one conventional system with uncoated circuit, roller pump, and a hard-shell venous reservoir.MethodsForty-one elderly patients (mean age, 73 +/- 1 years, 66% men) undergoing coronary artery bypass grafting or aortic valve replacement were included in a prospective, randomized study. Plasma concentrations of complement factors (C3a, C4d, Bb, and sC5b-9), proinflammatory cytokines (tumor necrosis factor-alpha, interleukin-6, and interleukin-8), granulocyte degradation products (polymorphonuclear elastase), and markers of coagulation (thrombin-antithrombin) and fibrinolysis (D-dimer, tissue plasminogen activator antigen and tissue plasminogen activator-plasminogen activator inhibitor-1 complex) were measured preoperatively, at bypass during rewarming (35 degrees C), 60 minutes after bypass, and on day 1 after surgery.ResultsThe mean concentrations of C3a (-39%; p = 0.008), Bb (-38%; p < 0.001), sC5b-9 (-70%; p < 0.001), interleukin-8 (-60%; p = 0.009), polymorphonuclear-elastase (-55%; p < 0.003), and tissue plasminogen activator antigen (-51%; p = 0.012) were all significantly lower in the biocompatible group during rewarming. Sixty minutes after bypass, the mean concentrations of sC5b-9 (-39%; p = 0.006) and polymorphonuclear-elastase (-55%; p < 0.001) were lower in the biocompatible group.ConclusionsThe results suggest that a closed perfusion system with a heparin-coated circuit and a centrifugal pump may improve cardiopulmonary bypass biocompatibility in elderly cardiac surgery patients in comparison with a conventional system.

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