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Dynamic Multiparameter Platelet Function Assessment Using a Capacitive Biosensor
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PFA-100 System: A New Method for Assessment of Platelet Dysfunction.

Eberhard F Mammen1, Philip C Comp2, Robert Gosselin3

  • 1Wayne State University School of Medicine, Detroit, Michigan.

Seminars in Thrombosis and Hemostasis
|December 13, 2023
PubMed
Summary

The PFA-100 system accurately identifies platelet function defects, showing high sensitivity and specificity comparable to aggregometry. This analyzer is a valuable tool for screening hemostasis disorders.

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Area of Science:

  • Hematology
  • Clinical Pathology

Background:

  • Platelet function analyzers are crucial for diagnosing hemostasis disorders.
  • The PFA-100 system utilizes collagen/epinephrine (CEPI) and collagen/ADP (CADP) cartridges to assess platelet function.
  • Previous studies indicated CEPI cartridges detect aspirin-induced defects, while CADP cartridges identify thrombocytopathies.

Purpose of the Study:

  • To evaluate the diagnostic performance of the PFA-100 system in identifying various platelet function defects.
  • To compare the PFA-100 system's accuracy against traditional platelet aggregometry.
  • To establish reference intervals for the PFA-100 system's CEPI and CADP cartridges.

Main Methods:

  • A seven-center trial involving 206 healthy subjects and 176 patients with platelet defects, including 127 aspirin users.
  • Comparison of PFA-100 results with a comprehensive platelet function test panel and platelet aggregometry.
  • Analysis of sensitivity, specificity, and concordance between the two testing methods.

Main Results:

  • The PFA-100 system demonstrated high clinical sensitivity (94.9%) and specificity (88.8%), comparable to aggregometry (94.3% sensitivity, 88.3% specificity).
  • The system effectively identified aspirin-induced defects (94.5% sensitivity) and congenital thrombocytopathies (95.9% sensitivity).
  • Overall agreement between PFA-100 and aggregometry was 87.5% (Kappa index 0.751), indicating equivalent diagnostic capabilities.

Conclusions:

  • The PFA-100 system is a highly accurate and reliable instrument for assessing platelet function.
  • Its ease of use makes it a valuable tool for screening patients with suspected platelet-related hemostasis defects.
  • The PFA-100 system offers comparable diagnostic performance to platelet aggregometry.