Performance comparison of platelet function analyzers in cardiology patients: VerifyNow and Anysis-200 aspirin assays

Young Hak Chung, Kyung Ah Lee, Minhee Cho, Sehyun Shin, Byoung Kwon Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


BACKGROUND: Analysis of responsiveness to antiplatelet therapy is crucial in the management of patients with cardiovascular diseases. OBJECTIVE: This study aimed to evaluate a new platelet function analysis system (Anysis-200) and to compare it with VerifyNow (Accumetrics, San Diego, CA, USA) in cardiology patients. METHODS: Overall, 125 citrated blood samples were collected from 85 cardiology patients referred for platelet function testing. In Anysis-200, platelet function was measured as blood migration distance (MD) until clogging of flow passage, which is comparable to aspirin resistance units obtained using VerifyNow. The two devices were simultaneously used and compared. RESULTS: The MDs before and after taking aspirin were 175±51 and 247±27 mm, respectively (p < 0.0001). Compared with VerifyNow (reference), the sensitivity and specificity of Anysis-200 was 91.5% and 75.5%, respectively (area under the curve, 0.829). Further, the true positive rate in patients newly taking aspirin was 85% for VerifyNow and 92.5% for Anysis-200, respectively. The Cohen's kappa coefficient between the two devices was 0.682, indicating a relatively high agreement. CONCLUSIONS: Anysis-200, a novel system for assessing platelet aggregation, has accuracy and precision equivalent to that of, and significant agreement with, VerifyNow. Anysis-200 may be useful in screening patients with abnormal platelet reactivity and aspirin nonresponsiveness.

Original languageEnglish
Pages (from-to)33-42
Number of pages10
JournalClinical Hemorheology and Microcirculation
Issue number1
Publication statusPublished - 2020

Bibliographical note

Funding Information:
This research was supported by the Korean Health Technology R&D Project, Ministry of Health and Welfare (no. HI14C0670).

Publisher Copyright:
© 2020-IOS Press and the authors. All rights reserved.


  • Anysis-200 analyzer
  • Platelet function
  • VerifyNow
  • aspirin

ASJC Scopus subject areas

  • Physiology
  • Hematology
  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)


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