Abstract
Objective: The aim of this study was to determine an optimal cutoff value for the newly available HemosIL-AcuStar-HIT-IgG assay (AcuStar) for the diagnosis of heparin-induced thrombocytopenia (HIT). Method: We evaluated the performance of AcuStar using serotonin release assay (SRA) as the gold standard and incorporated 4T score calculation in a cohort of suspected HIT cases. Statistical analysis was performed to determine optimal cutoff value for the diagnosis of HIT. Result: A diagnosis of HIT can be excluded with a platelet factor 4 (PF4) value of <0.4 U/mL by AcuStar and 4T score in the low-risk category (≤3). All other cases will require confirmation with a functional test. Conclusion: Our study resulted in the implementation of a diagnostic algorithm for laboratory diagnosis of HIT, which incorporates pretest calculation of 4T score and AcuStar as a screening test, with reflex confirmation by SRA. This new algorithm resulted in extended hours of test availability and a more rapid turnaround time in reporting PF4 results.
Original language | English (US) |
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Pages (from-to) | 34-39 |
Number of pages | 6 |
Journal | Lab Medicine |
Volume | 55 |
Issue number | 1 |
DOIs | |
State | Published - Jan 1 2024 |
Externally published | Yes |
Keywords
- AcuStar
- ELISA
- HIT
- PF4
- SRA
- heparin-induced thrombocytopenia
ASJC Scopus subject areas
- General Medicine