Rational use of the PFA-100 device for screening of platelet function disorders and von Willebrand disease

Buyukasik Y., Karakus S., Goker H., Haznedaroglu I., Ozatli D., Sayinalp N., ...Daha Fazla

BLOOD COAGULATION & FIBRINOLYSIS, cilt.13, sa.4, ss.349-353, 2002 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 4
  • Basım Tarihi: 2002
  • Doi Numarası: 10.1097/00001721-200206000-00011
  • Dergi Adı: BLOOD COAGULATION & FIBRINOLYSIS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.349-353
  • Hacettepe Üniversitesi Adresli: Evet

Özet

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.