Emergency department and trauma bay evaluation prior to neurosurgical consultation
Rural or community hospital settings where neurosurgical resources are limited
Clinical Utility
The BIG score stratifies mild TBI patients with intracranial hemorrhage into three risk categories, identifying candidates for non-operative management without routine neurosurgical consultation or repeat imaging. It reduces unnecessary transfers to tertiary centers and optimizes resource utilization while maintaining patient safety. The score combines clinical (GCS), radiographic (Marshall CT classification), and laboratory (INR) parameters into a simple additive score (1-3 points).
Pre-injury anticoagulation with warfarin (INR >1.4) or direct oral anticoagulants (DOACs) - requires different protocol
Platelet count <100,000/μL
Known coagulopathy (hemophilia, liver disease, uremia)
Clinical signs of herniation (Cushing's triad, asymmetric pupils)
Need for emergent decompressive craniectomy or hematoma evacuation
Suspected non-accidental trauma
Pregnancy (limited safety data for withholding repeat imaging)
Injury Mechanism Correlations
The BIG score was validated primarily in blunt trauma mechanisms: falls (41%), motor vehicle collisions (32%), pedestrian struck (15%), and assault (12%). High-energy mechanisms (fall >6 feet, MVC >40 mph, ejection, rollover) are overrepresented in BIG 2 and BIG 3 categories. Low-energy mechanisms (ground-level fall, low-speed MVC) predominate in BIG 1 patients. Penetrating injuries are explicitly excluded from the BIG protocol.
Related Scores in Practice
In clinical practice, this assessment is frequently evaluated alongside other validated measures. Depending on the patient's presentation and specific diagnostic requirements, you may also need to utilize the GCS, Marshall CT Classification, Rotterdam CT Score, IMPACT Prognostic Model, or the CRASH Model to formulate a comprehensive care plan.
