Rational use of the PFA-100 device for screening of platelet function disorders and von Willebrand disease.
Blood Coagul Fibrinolysis
; 13(4): 349-53, 2002 Jun.
Article
en En
| MEDLINE
| ID: mdl-12032401
ABSTRACT
Two hundred and five patients referred for evaluation of platelet functions and 126 healthy controls were tested with the PFA-100 instrument. A cut-off value of 150 s for collagen/epinephrine (CEPI) closure time (CT) produced most acceptable sensitivity (90%), specificity (85.2%), and positive (82.6%) and negative (91.6%) predictivity values for screening of platelet function disorders and von Willebrand disease (vWD). All patients with vWD and Glanzmann thrombasthenia could be detected by PFA-100. Both CEPI and collagen/adenosine diphosphate (CADP) CTs were elevated in all of these cases. Sensitivity of the device was 81.6% for patients with platelet secretion defects. CADP CT was normal in 63.9% of the patients in this subgroup. Specificity (47%) and positive predictivity (57%) of the instrument were diminished in patients with low hemoglobin concentrations. Depending on the results, an algorithm was developed for screening of platelet function disorders and vWD with PFA-100.
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Banco de datos:
MEDLINE
Asunto principal:
Enfermedades de von Willebrand
/
Algoritmos
/
Equipo para Diagnóstico
Tipo de estudio:
Diagnostic_studies
/
Observational_studies
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Prognostic_studies
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Risk_factors_studies
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Screening_studies
Límite:
Humans
Idioma:
En
Año:
2002
Tipo del documento:
Article