The 2026 AAN/CDC clinical guidelines for traumatic brain injury (TBI) establish a standardized diagnostic approach across different care settings. These guidelines prioritize a combination of imaging and molecular data to assess injury:
- Acute Triage: The guidelines recommend Computed Tomography (CT) as the first-line imaging standard for initial triage to detect hemorrhages and fractures.
- Follow-up Imaging: For subsequent evaluation, Magnetic Resonance Imaging (MRI) is utilized to identify subtle injuries missed by CT.
- Serum Biomarkers: A critical component of these guidelines is the recommendation of blood-based biomarkers—specifically S100B, GFAP, and UCH-L1—to guide imaging decisions and provide evidence of astroglial or neuronal damage.
This framework is often used in conjunction with other models, such as the CBI-M framework for severity classification and the four-pillar model for comprehensive evaluation, to ensure that microstructural injuries like diffuse axonal injury are accurately detected.
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