A Multidimensional Approach to Acute Traumatic Brain Injury: What the NIH-NINDS CBI-M Framework Means for Emergency Medicine.

Emergency physicians evaluate the full spectrum of traumatic brain injury (TBI) and generate the initial clinical descriptions that influence downstream care, follow-up, and patient expectations. Despite advances in neuroimaging, biomarker science, and systems of care, acute TBI is still commonly summarized using categorical labels: mild, moderate, and severe, derived from the Glasgow Coma Scale (GCS). In 2025, the National Institutes of Health-National Institute of Neurological Disorders and Stroke (NIH-NINDS) Traumatic Brain Injury Classification and Nomenclature Initiative proposed a multidimensional framework for acute TBI characterization incorporating Clinical, Biomarker, Imaging, and Modifier elements (CBI-M). The framework is intended to improve characterization and research rigor, and has generated broad interest and discussion across clinical disciplines. This special contribution introduced the CBI-M framework to the emergency medicine community and provides an interpretive, clinically grounded commentary on its relevance to emergency practice. The rationale for the framework is described, its core components are summarized, and its relevance to emergency department (ED) practice is discussed. Areas where CBI-M aligns with current emergency care, where important implementation questions remain, and how emergency physicians might engage with the framework as a shared language for describing injury rather than as a prescriptive management tool are highlighted. By situating CBI-M within the realities of emergency care and existing ED decision frameworks, this article aims to inform, contextualize, and encourage discussion within the emergency medicine community as this new approach to TBI characterization continues to evolve.