Differential effects of prolonged isoflurane anesthesia on plasma, extracellular, and CSF glutamate, neuronal activity, 125I-Mk801 NMDA receptor binding, and brain edema in traumatic brain-injured rats
2004
Background. Volatile anesthetics reduce neuronal excitation and cerebral metabolism but can also increase intracellular water accumulation in normal and injured brains. While attenuation of neuronal excitation and glutamate release are beneficial under pathological conditions, any increase in edema formation should be avoided. In the present study we investigated duration-dependent effects of the commonly used isoflurane/nitrous oxide (N2O) anesthesia on EEG activity, specific NMDA receptor binding, extracellular, CSF, and plasma glutamate, and cerebral water content in brain-injured rats subjected to short (30 minutes) or prolonged (4 hours) anesthesia.
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