interpreting-coagulation-studies
Interpreting Coagulation Studies
Structures coagulation test interpretation with mixing studies and inhibitor identification.
Why This Skill Exists
Coagulation testing underpins the diagnosis and management of bleeding disorders, thrombophilia, anticoagulant therapy monitoring, and perioperative hemostasis assessment. Misinterpretation of a prolonged PTT — failing to distinguish a factor deficiency from a lupus anticoagulant or a specific factor inhibitor — can lead to inappropriate therapy: unnecessary factor replacement, missed anticoagulant monitoring, or failure to diagnose acquired hemophilia, which carries a mortality rate of 8-22%. The ISTH (International Society on Thrombosis and Haemostasis), CLSI guidelines (H47-A2, H21-A5), and CAP Coagulation (COA) checklist establish the standards for test performance, mixing study interpretation, and factor assay methodology.
Laboratories must maintain reagent-specific reference ranges, validate mixing study interpretation criteria, and participate in CAP proficiency testing for coagulation. CLIA requires documented procedures for all testing phases and competency assessment for technologists performing coagulation assays. This skill provides a systematic framework for interpreting coagulation results accurately and consistently.