Introduction: Little is known about the effects of hemodialysis on the injured brain, however; concern exists over the use of intermittent hemodialysis in patients with acute brain injury (ABI) due to its hemodynamic effects and increased intracranial pressure (ICP) associated with therapy. Continuous renal replacement therapy (CRRT) has become the preferred method of renal support in these patients though there is limited data to support its safety. Furthermore, exacerbations of cerebral edema have been reported. CRRT is an option for the treatment of hypervolemia and in theory may improve intracranial compliance. We report the case of a poly-trauma patient with severe traumatic brain injury (TBI) in which CRRT was implemented solely for refractory intracranial hypertension.
Methods: A 28-year-old male was involved in a high-speed motor vehicle collision suffering a severe TBI and polytrauma. He required significant volume resuscitation. Intensive care unit course was complicated by shock, acute respiratory distress syndrome, ventilator associated pneumonia, and development of intracranial hypertension (IH). Data were collected by retrospective chart review.
Results: Continuous hemofiltration was initiated for IH refractory to medical therapy. Within hours of initiation increase, ICP improved and normalized. Hemofiltration was safely discontinued after 48 h. Modified Rankin Score was 2 at 90 days.
Conclusion: Though unproven, CRRT may be beneficial in patients with IH due to gentle removal of fluid, solutes, and inflammatory cytokines. Given the limited data on safety of CRRT in patients with ABI, we encourage further reports.
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