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  • Title: Assessment of primary hemostasis by PFA-100 analysis in a tertiary care center.
    Author: Ortel TL, James AH, Thames EH, Moore KD, Greenberg CS.
    Journal: Thromb Haemost; 2000 Jul; 84(1):93-7. PubMed ID: 10928477.
    Abstract:
    We evaluated the utility of the PFA-100 platelet function analyzer in identifying disorders in platelet function and/or von Willebrand factor (vWF) in patients with various systemic disorders being followed at a tertiary care center. Closure times were determined with collagen/ ADP (CADP) and collagen/epinephrine (CEPI) cartridges for 305 patients, and abnormal results were further evaluated with platelet aggregometry and vWF analysis. Prolonged CADP and/or CEPI closure times were identified in 114 patients (37.3%), but most were isolated prolonged CEPI closure times predominantly due to aspirin therapy (79 patients). Prolonged CADP closure times were most frequently due to qualitative platelet defects and/or decreased vWF levels. Prolonged CADP closure times were encountered most frequently in patients with sickle cell disease and were associated with a decreased hematocrit. This study demonstrated that the PFA-100 analyzer can accurately assess vWF-dependent platelet function and detect other platelet defects under high shear stress in complex patient populations.
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