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• W2132051224 endingPage "19" @default.
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• W2132051224 abstract "Cardiopulmonary bypass (CPB) exposes blood to large, foreign surfaces. This exposure may activate the cellular and humoral inflammatory systems, resulting in inflammatory reactions and organ dysfunction. Coating the inner surfaces of the bypass circuit may help alleviate these side-effects. The objective of this study was to determine the influence of two new surface treatments on blood cell and complement activation. Oxygenator and tubing sets coated with synthetic polymers ( n = 7) or heparin ( n = 7) were compared to uncoated sets ( n = 7) in an in vitro model of CPB. The circuits were run at 4 l/min and recirculated for 120 min. The inflammatory response was assessed at regular intervals by platelet counts, and activation of complement, leucocytes and platelets. We found that the median platelet counts decreased from 127 to 122 × 10 9 /l (not significant, NS) in the synthetic polymer sets, from 96 to 88 × 10 9 /l (NS) in the heparin-coated sets, and from 93 to 54 × 10 9 /l ( p < 0.01) in the uncoated sets after 2 h of recirculation. There were significant differences in platelet counts between the coated sets and the uncoated set at end of experiments ( p < 0.05). Beta-thromboglobulin (BTG) concentrations increased in the synthetic polymer sets from 166 to 352 ng/ml ( p < 0.01), in the heparin coated sets from 336 to 1168 ng/ml ( p < 0.01), and in the uncoated sets from 301 to 3149 ng/ml ( p < 0.01) after 2 h of recirculation. The differences in BTG at termination of the experiments were significant among all three sets ( p < 0.05). Myeloperoxidase (MPO) concentrations in the synthetic polymer sets increased from 63 to 86 μg/l ( p < 0.01), in the heparin-coated sets from 90 to 208 μg/l ( p < 0.01), and in the uncoated sets from 122 to 513 μg/l ( p < 0.01) after 2 h of recirculation. The differences in MPO at termination of the experiments were significant among all three groups ( p < 0.01). There were no significant differences at termination of the experiments among the three sets regarding complement activation as measured by C3 activation products and the terminal complement complex. We conclude that in the current in vitro model of a CPB circuit, the synthetic polymer coating and the heparin coating caused significantly less platelet loss and granulocyte and platelet activation than the uncoated surface ( p < 0.05). The synthetic polymer coating caused significantly less granulocyte and platelet activation than the heparin coating ( p < 0.05). There was moderate complement activation within each group, but no significant differences among the three groups." @default.
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• W2132051224 date "1999-01-01" @default.
• W2132051224 modified "2023-09-27" @default.
• W2132051224 title "In vitro evaluation of new surface coatings for extracorporeal circulation" @default.
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• W2132051224 doi "https://doi.org/10.1177/026765919901400103" @default.
• W2132051224 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/10074642" @default.
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