Clinical Indicators for Primary Cranial CT Imaging after Mild Traumatic Brain Injury-A Retrospective Analysis

Area of Science:

• Neurology
• Radiology
• Emergency Medicine

Background:

• Mild traumatic brain injury (mTBI) is a common reason for emergency department visits.
• Accurate assessment of mTBI is crucial to identify patients requiring neuroimaging and hospitalization.
• Clinical indicators for cranial CT and observation need further clarification.

Purpose of the Study:

• To identify clinical indicators for primary cranial CT imaging in patients with mTBI.
• To evaluate the necessity of short-term hospitalization based on initial clinical and CT findings.

Main Methods:

• Retrospective observational study of 1837 mTBI patients over five years.
• Analysis of demographic data, clinical presentation, and radiological findings (initial CT and repeat CT).
• Multivariable analysis to correlate clinical variables with CT findings and patient outcomes.

Main Results:

• Acute intracranial hemorrhage (ICH) was detected in 5.5% of patients.
• Clinical indicators for acute ICH included Glasgow Coma Scale (GCS) <15, loss of consciousness, amnesia, seizures, cephalgia, somnolence, dizziness, nausea, and cranial fracture signs.
• Repeat CT scans (CT1) showed no clinically relevant findings.
• Delayed ICH incidence was very low (0.05%).

Conclusions:

• Specific clinical signs are strong indicators for primary cranial CT in mTBI.
• Hospitalization decisions should be individualized, considering both clinical presentation and CT results.
• The low incidence of delayed ICH suggests careful patient selection for observation is warranted.