Heparin is unable to prevent contact activation by three different membranes.

P. Stratta, C. Canavese, G. Mangiarotti, A. Pacitti, C. Tetta, R. Coppo, R. Ragni, A. Vercellone

Research output: Contribution to journalArticlepeer-review

Abstract

In spite of the anticoagulant activity of heparin platelet deposition and contact activation of coagulation occurs during dialysis. We have studied platelet counts, fibrinogen, platelet factor 4, beta-thromboglobulin, thromboxane B2, FRA, C3d and kallikrein values, whole blood and euglobulin lysis times and membrane areas in haemodialysis using cuprophan and cellulose acetate and in haemofiltration with polyacrilonitrile. Deposits on all the three membranes included leucocytes, platelets and fibrin. The coagulation and fibrinolytic systems are activated more intensively with cellulose acetate and more prolongedly with polyacrilonitrile. Platelet factor 4 and beta-thromboglobulin increases suggest platelet activation, only partially dependent on arachidonic acid-mediated pathway as thromboxane B2 is not increased. The complement system is activated whereas serum kallikrein does not alter, suggesting that platelets rather than factor XII are crucial in contact activation.

Original languageEnglish
Pages (from-to)269-274
Number of pages6
JournalProceedings of the European Dialysis and Transplant Association. European Dialysis and Transplant Association
Volume18
Publication statusPublished - 1981
Externally publishedYes

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