Quality Assurance in Platelet Function Testing.

Platelets play a crucial role in primary hemostasis. Congenital and acquired platelet disorders may be associated with bleeding. High-quality laboratory assessment of platelets is crucial for patient care. Multiple methods have been developed to assess platelet function. While several guidelines have been published related to platelet function testing, surveys demonstrate wide variation in practices. Preanalytical variables such as patient medication use, collection, transport, and storage impact testing results. Test interpretation requires appropriate reference intervals and an understanding of the impact of thrombocytopenia on results. Internal and external quality assessments aid laboratories in monitoring the performance of platelet function assays.