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Updated: Oct 17, 2026

Systems Analysis of the Neuroinflammatory and Hemodynamic Response to Traumatic Brain Injury
Published on: May 27, 2022
Hemolytic brain edema: a new pathophysiologic approach for diagnosis and management of neurotrauma patients
Andrés M Rubiano1, Wendy D González2, Laura M Loaiza-Cardona2
1Meditech Foundation, Cali, Colombia; Neuroscience Institute, El Bosque University, Bogotá, Colombia; Department of Neurosurgery, Universidad del Valle, Cali, Colombia.
Abstract:
Traumatic brain injury (TBI) remains a leading cause of death and disability worldwide. Among the mechanisms of secondary brain injury, hemorrhagic transformation and intraparenchymal bleeding are recognized as critical determinants of neurological outcomes. Current classifications of cerebral edema (vasogenic, cytotoxic, CSF-shift edema, interstitial, osmotic, and ionic) fail to fully account for the pathophysiological complexity observed in hemorrhagic neurotrauma. We propose the concept of hemolytic brain edema as a discrete pathophysiological entity, representing a novel form of posttraumatic brain edema driven by the biochemical consequences of erythrocyte lysis following traumatic hemorrhagic events in the central nervous system (CNS). Hemolytic brain edema encompasses erythrocyte membrane disruption and hemoglobin release; heme catabolism generating free iron and reactive oxygen species (ROS); thrombin activation with direct neurotoxicity; complement cascade activation; microglial polarization and cytokine-mediated blood-brain barrier (BBB) disruption; and extracellular fluid accumulation with perivascular edema formation. Recognition of hemolytic brain edema may fundamentally alter monitoring strategies in neurocritical care, refine neuroimaging interpretation, and identify new surgical indications. Early iron chelation, thrombin inhibition, modulation of the complement pathway, and targeted antioxidant strategies may mitigate hemolytic edema formation and improve neurological outcomes.
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