Articles: traumatic-brain-injuries.
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Minerva anestesiologica · Apr 2016
ReviewAnother failed attempt of neuroprotection: Progesterone for moderate and severe traumatic brain injury.
Two large phase-III prospective, multicenter, controlled, double-blind, randomized clinical trials (the PROTECT III study; the SYNAPSE study) evaluated the effectiveness of an early administration of progesterone in patients with moderate to severe traumatic brain injury (TBI). In the PROTECT III Trial, patients were included if the admission Glasgow Coma Scale (GCS) was within 4-12, whereas the SYNAPSE Trial only included patients with GCS 4-8. The total dose of progesterone was nearly similar in both studies and drug administration was initiated early after injury (within 4 hours for a total of 96 hours in PROTECT; within 8 hours for 120 hours in SYNAPSE). ⋯ In PROTECT, the proportion of patients with favourable outcome was similar between groups (51% for progesterone vs. 56% for placebo; RR 3.03 [95% CI 1.96-4.66]); in SYNAPSE, no difference in GOS between the progesterone and placebo group was found (OR 0.96 [95% CI 0.77-1.18]). There was no difference in 6-month mortality or any of the other secondary outcomes between groups in the two trials. These studies demonstrated that early progesterone administration did not provide any benefit on the neurological recovery of TBI patients.
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Curr Neurol Neurosci Rep · Apr 2016
ReviewCerebral Lactate Metabolism After Traumatic Brain Injury.
Cerebral energy dysfunction has emerged as an important determinant of prognosis following traumatic brain injury (TBI). A number of studies using cerebral microdialysis, positron emission tomography, and jugular bulb oximetry to explore cerebral metabolism in patients with TBI have demonstrated a critical decrease in the availability of the main energy substrate of brain cells (i.e., glucose). Energy dysfunction induces adaptations of cerebral metabolism that include the utilization of alternative energy resources that the brain constitutively has, such as lactate. ⋯ Here, we summarize the main clinical studies showing the pivotal role of lactate and cerebral lactate metabolism after TBI. We also review pilot interventional studies that examined exogenous lactate supplementation in patients with TBI and found hypertonic lactate infusions had several beneficial properties on the injured brain, including decrease of brain edema, improvement of neuroenergetics via a "cerebral glucose-sparing effect," and increase of cerebral blood flow. Hypertonic lactate represents a promising area of therapeutic investigation; however, larger studies are needed to further examine mechanisms of action and impact on outcome.
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Curr Opin Crit Care · Apr 2016
ReviewPediatric neurocritical care in the 21st century: from empiricism to evidence.
Approximately one in five children admitted to a pediatric ICU have a new central nervous system injury or a neurological complication of their critical illness. The spectrum of neurologic insults in children is diverse and clinical practice is largely empirical, as few randomized, controlled trials have been reported. This lack of data poses a substantial challenge to the practice of pediatric neurocritical care (PNCC). PNCC has emerged as a novel subspecialty, and its presence is expanding within tertiary care centers. This review highlights the recent advances in the field, with a focus on traumatic brain injury (TBI), cardiac arrest, and stroke as disease models. ⋯ There is an unmet need for clinicians with expertise in the practice of brain-directed critical care for children. Although much of the practice of PNCC may remain empiric, a focus on the regionalization of care, creating defined training paths, practice within multidisciplinary teams, protocol-directed care, and improved measures of long-term outcome to quantify the impact of such care can provide evidence to direct the maturation of this field.
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Review Comparative Study
A Systematic Review of Randomized Controlled Trials Comparing Hypertonic Sodium Solutions and Mannitol for Traumatic Brain Injury: Implications for Emergency Department Management.
To comparatively evaluate hypertonic sodium (HTS) and mannitol in patients following acute traumatic brain injury (TBI) on the outcomes of all-cause mortality, neurological disability, intracranial pressure (ICP) change from baseline, ICP treatment failure, and serious adverse events. ⋯ Based on limited data, clinically important differences in mortality, neurological outcomes, and ICP reduction were not observed between HTS or mannitol in the management of severe TBI. HTS appears to lead to fewer ICP treatment failures.
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Critical illness is a major cause of morbidity and mortality around the world. While obesity is often detrimental in the context of trauma, it is paradoxically associated with improved outcomes in some septic patients. The reasons for these disparate outcomes are not well understood. ⋯ Not only do experimental variables need to be matched as closely as possible to clinical scenarios, but animal models with pre-existing comorbid conditions need to be studied. This review briefly summarizes animal models of hemorrhage, blunt trauma, traumatic brain injury, and sepsis. It also discusses what has been learned through the use of obese models to study the pathophysiology of critical illness in light of what has been demonstrated in the clinical literature.