Evaluation of the effectiveness of platelet crossmatching by the solid‐phase red cell adherence assay in adult patients of a tertiary care hospital in Thailand: A retrospective study

BACKGROUND AND AIMS: Platelet transfusion refractoriness is well aware to be associated with poor clinical outcomes. Patients with the alloantibody causing refractoriness required cross‐matched compatible products to improve the platelet number. This study aims to evaluate the effectiveness and availability of platelet crossmatching provided by the solid‐phase red cell adherence (SPRCA) technique in the context of a tertiary university hospital. METHODS: A retrospective chart review was performed of the records of 214 patients with platelet refractoriness in Siriraj Hospital, a tertiary university hospital in Thailand, between January 1, 2017, and December 31, 2020. RESULTS: The SPRCA technique successfully provided cross‐matched compatible platelets to 114 patients (69.7%). Platelet crossmatching significantly improved the platelet counts, as shown by the increased 1‐ and 24‐h corrected‐count increments (p< 0.0001). No acute transfusion reactions were observed in these patients. Of the 114 patients who received cross‐matched platelets, 82 patients (71.9%) survived at 30‐day posttransfusion; whereas, 16 patients (14.0%) died within 7‐day posttransfusion. CONCLUSION: The SPRCA method can provide a high availability rate of cross‐matched platelets, which is effective at stopping and preventing clinical bleeding conditions. This method is appropriate to apply for platelet crossmatching in the context of a hospital blood bank.