Neurocritical care
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Super-refractory status epilepticus (SRSE) ensues when there is no improvement of seizure control in response to anesthetic therapy or seizure recurrence after reduction of anesthetic agents. There is no consensus on standard of care for SRSE. Ketogenic diet (KD) has reported success, but technical challenges exist including inability to feed patients, concomitant steroid use, acidotic states, and lack of dieticians with experience. The optimal protocol for KD is yet to be determined. We describe our approach to initiation of KD in the pediatric intensive care unit (PICU). ⋯ We demonstrated the feasibility of a practical approach to initiation of KD for children with SRSE. These children were successfully weaned off continuous anesthetic infusions. Larger studies are needed to determine effectiveness, safety, and tolerability of KD in the management of SRSE as well as ease of implementation.
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Randomized Controlled Trial
Influence of Glycemic Control on Endogenous Circulating Ketone Concentrations in Adults Following Traumatic Brain Injury.
The objective was to investigate the impact of targeting tight glycemic control (4.4-6.1 mM) on endogenous ketogenesis in severely head-injured adults. ⋯ Permissive underfeeding was tolerated when targeting tight glycemic control, but total nutritional support is an important factor when treating hyperglycemia.
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Review Case Reports
Takotsubo Cardiomyopathy in Traumatic Brain Injury.
Takotsubo cardiomyopathy (TC) is a well-known complication after aneurysmal subarachnoid hemorrhage and has been rarely described in patients with traumatic brain injury (TBI). ⋯ Takotsubo cardiomyopathy is under-recognized after TBI and may negatively impact outcome if left untreated.
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Multicenter Study
Volume of Plasma Expansion and Functional Outcomes in Stroke.
Plasma expansion in acute ischemic stroke has potential to improve cerebral perfusion, but the long-term effects on functional outcome are mixed in prior trials. The goal of this study was to evaluate how the magnitude of plasma expansion affects neurological recovery in acute stroke. ⋯ The present study demonstrates an association between greater volume of plasma expansion and worse neurological recovery.
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A growing body of clinical literature emphasizes the impact of cerebral edema in early brain injury following aneurysmal subarachnoid hemorrhage (aSAH). Aneurysm rupture itself initiates global cerebral edema in up to two thirds of cases. Although cerebral edema is not a universal feature of aSAH, it portends a poor clinical course, with quantitative analysis revealing a direct correlation between cerebral edema and poor outcome, including mortality and cognitive deficits. ⋯ At a molecular level, several culprits have been identified, including aquaporin-4, matrix metalloproteinase-9, SUR1-TRPM4 cation channels, vascular endothelial growth factor, bradykinin, and others. Here, we review these cellular and molecular mechanisms of global cerebral edema formation in aSAH. Given the importance of edema to the outcome of patients with aSAH and its status as a highly modifiable pathological process, a better understanding of cerebral edema in aSAH promises to hasten the development of medical therapies to improve outcomes in this frequently devastating disease.