Hypercoagulability following Multiple Trauma

Abstract
We sought evidence of hypercoagulability in 59 seriously injured trauma patients. An extended coagulation profile (consisting of tissue plasminogen activator antigen concentration, plasminogen activator inhibitor, serum antithrombin III, protein C antigen, functional protein C, protein S antigen, D-dimer, and prothrombin fragment 1.2) was compared to control values. Laboratory evidence of hypercoagulability was seen in 85% ( n = 50) of the patients. Patients with an Injury Severity Score (ISS) ≥ 16 ( n = 36) had significantly elevated levels of D-dimer and decreased levels of functional protein C compared to patients with an ISS ≤ 15 ( n = 23). Functional protein C had a negative correlation ( r =−0.44; p < 0.001) with the ISS. A hypercoagulable state exists immediately following severe trauma. Greater injury severity may increase this hypercoagulable state. Decreased levels of functional protein C best correlated with increased injury severity.

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