alexa Early cerebral metabolic crisis after TBI influences outcome despite adequate hemodynamic resuscitation.
Medicine

Medicine

Emergency Medicine: Open Access

Author(s): Stein NR, McArthur DL, Etchepare M, Vespa PM

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Abstract BACKGROUND: Optimal resuscitation after traumatic brain injury (TBI) remains uncertain. We hypothesize that cerebral metabolic crisis is frequent despite adequate resuscitation of the TBI patient and that metabolic crisis negatively influences outcome. METHODS: We assessed the effectiveness of a standardized trauma resuscitation protocol in 89 patients with moderate to severe TBI, and determined the frequency of adequate resuscitation. Prospective hourly values of heart rate, blood pressure, pulse oximetry, intracranial pressure (ICP), respiratory rate, jugular venous oximetry, and brain extracellular values of glucose, lactate, pyruvate, glycerol, and glutamate were obtained. The incidence during the initial 72 h after injury of low brain glucose <0.8 mmol/L, elevated lactate/pyruvate ratio (LPR) >25, and metabolic crisis, defined as the simultaneous occurrence of both low glucose and high LPR, were determined for the group. RESULTS: 5 patients were inadequately resuscitated and eight patients had intractable ICP. In patients with successful resuscitation and controlled ICP (n = 76), within 72 h of trauma, 76\% had low glucose, 93\% had elevated LPR, and 74\% were in metabolic crisis. The duration of metabolic crisis was longer in those patients with unfavorable (GOSe ≤ 6) versus favorable (GOSe ≥ 7) outcome at 6 months (P = 0.011). In four multivariate models the burden of metabolic crisis was a powerful independent predictor of poor outcome. CONCLUSIONS: Metabolic crisis occurs frequently after TBI despite adequate resuscitation and controlled ICP, and is a strong independent predictor of poor outcome at 6 months. This article was published in Neurocrit Care and referenced in Emergency Medicine: Open Access

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