Emergency medicine Australasia : EMA · 2024
Can rotational thromboelastometry rapidly identify theragnostic targets in isolated traumatic brain injury?
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Hiwase Abhiram D, Ovenden Christopher D, Kaukas Lola M, Finnis Mark, Zhang Zeyu, O'Connor Stephanie, Foo Ngee, Reddi Benjamin, Wells Adam J, Ellis Daniel Y
Аннотация
OBJECTIVE: Coagulation assessment in traumatic brain injury (TBI) typically relies upon laboratory-based standard coagulation tests (SCTs), including the activated partial thromboplastin time (aPTT), INR and platelet count. Rotational thromboelastometry (ROTEM) sigma is an alternative point-of-care assay; however, its role in isolated TBI is under-evaluated. The present study aims to assess the prognostic utility of ROTEM sigma in isolated TBI.
METHODS: ROTEM sigma analysis was performed during the initial evaluation of patients presenting to the Royal Adelaide Hospital between February 2022 and 2023 with radiographically demonstrated traumatic intracranial haemorrhage and GCS ≤14. Patients with concomitant severe extracranial injury, or who received blood products or antifibrinolytic therapy prior to sample collection were excluded.
RESULTS: Thirty-six patients had blood samples analysed with ROTEM, 25 of these patients were also evaluated with paired SCTs. Twenty-two per cent (8/36) of patients with isolated TBI had a hypocoaguable ROTEM profile, and this was associated with an increased incidence of head injury-related death (50% [4/8] vs 11% [3/28], P = 0.03). Median diagnostic turn-around-times were shorter for ROTEM parameters compared to SCT counterparts: EXTEM clotting time (CT) versus INR (20 vs 63 min, P < 0.01), and INTEM CT versus aPTT (21 vs 63 min, P < 0.01). EXTEM CT, FIBTEM CT and INR values had similar performance in predicting head injury-related death, area under the receiver operator curves were 0.8, 0.8 and 0.7, respectively.
CONCLUSIONS: ROTEM sigma expedites the detection of clinically significant coagulopathy in isolated TBI. EXTEM and FIBTEM CT values are more rapidly attainable than INR and comparable in predicting head injury-related death.
METHODS: ROTEM sigma analysis was performed during the initial evaluation of patients presenting to the Royal Adelaide Hospital between February 2022 and 2023 with radiographically demonstrated traumatic intracranial haemorrhage and GCS ≤14. Patients with concomitant severe extracranial injury, or who received blood products or antifibrinolytic therapy prior to sample collection were excluded.
RESULTS: Thirty-six patients had blood samples analysed with ROTEM, 25 of these patients were also evaluated with paired SCTs. Twenty-two per cent (8/36) of patients with isolated TBI had a hypocoaguable ROTEM profile, and this was associated with an increased incidence of head injury-related death (50% [4/8] vs 11% [3/28], P = 0.03). Median diagnostic turn-around-times were shorter for ROTEM parameters compared to SCT counterparts: EXTEM clotting time (CT) versus INR (20 vs 63 min, P < 0.01), and INTEM CT versus aPTT (21 vs 63 min, P < 0.01). EXTEM CT, FIBTEM CT and INR values had similar performance in predicting head injury-related death, area under the receiver operator curves were 0.8, 0.8 and 0.7, respectively.
CONCLUSIONS: ROTEM sigma expedites the detection of clinically significant coagulopathy in isolated TBI. EXTEM and FIBTEM CT values are more rapidly attainable than INR and comparable in predicting head injury-related death.