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DOI: 10.1055/s-2007-1013753
© Georg Thieme Verlag Stuttgart · New York
A Comparative Evaluation of the Effect of Pump Type and Heparin-Coated Surfaces on Platelets during Cardiopulmonary Bypass
Publication History
1997
Publication Date:
19 March 2008 (online)
Abstract
Cardiopulmonary bypass (CPB) is associated with hemostatic disorders, mainly due to platelet function defects. In the present prospective study, platelet count and GMP-140 expression on platelets were investigated to comparatively evaluate the impact of different CPB-circuit systems on platelets. The study included 61 patients undergoing coronary artery bypass grafting, randomly assigned to 3 groups. In group A a roller pump, in group B a centrifugal pump, and in group C a centrifugal pump with a Carmeda™ heparin-coated CPB circuit was applied. Platelet count and GMP-140 expression were analysed pre, during, and following CPB. None of the tested CPB systems did affect platelet count. The percentage of GMP-140-positive platelets increased slightly early during CPB, whereas it decreased significantly postoperatively; group differences were observed between B and C after protamin administration. An advantage of the use of centrifugal pumps and heparin-coated circuits could not be proven with the present set-up. The results suggest that the benefit of the tested systems might depend on the operative procedure and management.
Key words
Cardiopulmonary bypass - Circuit Systems - Platelets - GMP-140