Articles: brain-injuries.
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Critical care medicine · Apr 2000
Use of hypertonic saline in the treatment of severe refractory posttraumatic intracranial hypertension in pediatric traumatic brain injury.
To evaluate the effect of prolonged infusion of 3% hypertonic saline (514 mEq/L) and sustained hypernatremia on refractory intracranial hypertension in pediatric traumatic brain injury patients. ⋯ An increase in serum sodium concentration significantly decreases ICP and increases CPP. Hypertonic saline is an effective agent to increase serum sodium concentrations. Sustained hypernatremia and hyperosmolarity are safely tolerated in pediatric patients with traumatic brain injury. Controlled trials are needed before recommendation of widespread use.
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Ann Fr Anesth Reanim · Apr 2000
Review[Role of the regulation in the management of patients with severe head injuries].
The regulator of the emergency medical ambulance service is involved in the various steps of the initial management of severe head trauma patients: handling calls, basic life support, prehospital advance life support, transport and hospital admission. The management is rapid (helicopter transports) coherent and adapted (adherence to the guidelines for severe head injury), and considers of local difficulties (geographical, possibility of admission to trauma centres), with the aim of improving the outcome of severely head-injured patients.
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Traumatic brain injury (TBI) constitutes a major health and economic problem for developed countries, being one of the main causes of mortality and morbidity in children and young adults. Because of the immense importance and future consequences of TBI, the physician who sees a patient soon after brain injury must have a complete understanding of the pathophysiology and develop a practical knowledge of initial management of such patients. TBI may have intracranial and systemic effects that combine to give overall cerebral ischaemia. ⋯ The concept of 'cerebral protection' has been extended to encompass pretreatment of secondary injury. Preventing and treating cerebral ischaemia is the main goal of initial management of head-injured patients. Initial care focuses on achieving oxygenation, airway control and treatment of arterial hypotension.
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To avoid ischaemic secondary insults after severe head injury (SHI) it would be helpful to know the relationship between cerebral perfusion pressure (CPP) and intracranial pressure (ICP). Static cerebrovascular autoregulation (AR) was tested in 14 patients after SHI. Mean arterial pressure (MAP) was varied to detect changes in intracranial pressure (ICP) indicative of intact AR. ⋯ Lower AR breakpoints were seen from 60 to 80 mmHg CPP, upper breakpoints were as high as 112. CPP monitoring achieves a twofold utility in targeted therapy: (1) defining the range of intact AR; and (2) lower AR breakpoint assessment to avoid secondary insults. Although the precise relationship between pAR breakpoints and the adequacy of cerebral perfusion to meet metabolic needs remains unclear, a technique such as described here is simple and has much to offer in targeting therapy toward specific pathophysiological processes in traumatic brain injury.
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Brain Res. Brain Res. Protoc. · Apr 2000
Methods to induce primary and secondary traumatic damage in organotypic hippocampal slice cultures.
Organotypic brain slice cultures have been used in a variety of studies on neurodegenerative processes [K. M. Abdel-Hamid, M. ⋯ Asseline, Effect of mild hypothermia on cerebral energy metabolism during the evolution of hypoxic ischaemic brain damage in the immature rat, Stroke, 5, 1996, pp. 919-925.]. Low temperature incubation significantly reduced cell death, now being 9% at 24 h and 14% at 67 h. Our results show that these models of moderate mechanical trauma using organotypic slice cultures can be used to study neurodegeneration and neuroprotective strategies.