Viscoelastic Testing and Coagulopathy of Traumatic Brain Injury

Area of Science:

• Neuroscience
• Hematology
• Trauma Surgery

Background:

• Traumatic brain injury (TBI) frequently results in a complex coagulopathy.
• Conventional plasma-based coagulation assays (PT, PTT, INR) often inadequately assess TBI-related hemostatic dysfunction.
• This limitation complicates clinical decisions regarding prophylaxis and therapy.

Purpose of the Study:

• To review the application and utility of whole blood viscoelastic tests (VTs) in managing TBI-associated coagulopathy.
• To highlight the role of VTs, particularly when combined with platelet function assays, in understanding TBI pathophysiology.
• To discuss the potential of VTs as evidence-based tools for improving patient outcomes.

Main Methods:

• Review of existing literature on viscoelastic tests and their application in traumatic brain injury.
• Analysis of how modified VTs and platelet function assays elucidate coagulopathy mechanisms.
• Discussion of clinical decision-making guided by VT results in TBI patients.

Main Results:

• Viscoelastic tests offer a more comprehensive assessment of whole blood coagulation compared to conventional assays in TBI.
• Platelet dysfunction, particularly involving ADP and/or AA receptors, is a primary contributor to coagulopathy in TBI.
• Modified VTs aid in guiding goal-directed treatment strategies.

Conclusions:

• Viscoelastic tests are valuable tools for diagnosing and managing coagulopathy following TBI.
• Understanding platelet function via VTs is crucial for effective TBI patient care.
• Further research is needed to establish VTs as precision-based tools to optimize TBI outcomes.