title: The effect of various anticoagulant/antiplatelet mixtures on determination of plasminogen activator inhibitor, platelet proteins and hemostasis parameters.
abstract: Blood collected in different anticoagulant/antiplatelet agents (ETP, EDTA, citrate, citrate/citric acid pH 4.5 and CTAD) was compared with respect to determination of PAI-1 activity and PAI-1 antigen. beta TG and PF4 were analysed as markers of platelet release. Both the middle layer and the remaining layer of the plasma were studied. Moreover vWF:Ag, FVII:Ag, ECLT, t-PA:Ag, t-PA activity, APTT, VIII:C and VII:C were assayed in blood collected in citrate and CTAD. PAI-1 activity showed the same level in all citrate based anticoagulants and ETP and no increase was found in blood standing for 2 hours at room temperature. On the contrary quick handling was most important for determination of PAI-1 antigen. In tubes anticoagulated with citrate no significant increase was found if the sample was prepared within 1 hour. EDTA was not suitable as anticoagulant mixture. Tubes containing the antiplatelet mixture CTAD could be used for determination of PAI activity, PAI antigen, vWF:Ag, FVII:Ag, t-PA activity and APTT. For measurement of PAI-1 antigen quick handling of blood anticoagulated with antiplatelet mixtures are preferable, and plasma treated in that manner could also be used to assay some hemostasis parameters.
authors.affiliation: Department of Surgery I, Ostra Hospital, University of Göteborg, Sweden.
authors.forename: E
authors.initials: E
authors.lastname: Eriksson
authors.forename: L
authors.initials: L
authors.lastname: Tengborn
authors.forename: B
authors.initials: B
authors.lastname: Risberg
mesh_terms: D000925:Anticoagulants / Q000494:pharmacology*; D001780:Blood Coagulation Tests; D006487:Hemostasis / Q000187:drug effects; D006801:Humans; D010960:Plasminogen Activators / Q000037:antagonists & inhibitors*; D015849:Plasminogen Inactivators / Q000097:blood*; D010975:Platelet Aggregation Inhibitors / Q000494:pharmacology*; D010978:Platelet Factor 4 / Q000378:metabolism*; D013927:Thrombosis / Q000097:blood; D001620:beta-Thromboglobulin / Q000378:metabolism*
chemical_list: D000925:Anticoagulants; D015849:Plasminogen Inactivators; D010975:Platelet Aggregation Inhibitors; D001620:beta-Thromboglobulin; D010978:Platelet Factor 4; D010960:Plasminogen Activators