Changes of power of cerebral topographic map and electroencephalogram during anesthesia induction with propofoi,sodium thiopental or gama hydroxybutyrate sodium / 中华麻醉学杂志

ABSTRACT

Cerebral topographic map (CTM) and electroencephalogram (EEG) can evaluate the functional activity of brain, and the purpose of this study was to objectively compare the effect of intravenous anesthetics on brain. Forty-five patients, ASA grade Ⅰ-Ⅱ, undergoing neurosurgery,were randomly divided into three groups after administration of Innovar 2 ml, and then equivalent effective dose of propofol(2～2.5 mg/kg)(Ⅰ),sodium thiopental (4～6mg/kg)(Ⅰ) or gama hydroxybutyrate sodium (70～80mg/kg)(Ⅲ) was intravenously given respectively. All patients were monitored continuously during induction. The high frequent excitative activities of ? rhythm appeared immediately after each anesthestic was injected. During the most effective period in group Ⅰ, there were no ? rhythm in EEG and obvious power change on CTM; in group Ⅱ irregular ? rhythm took place in EEG occasionally and great increase in top power on CTM occured, which showed evident elevation compared with group Ⅰ (P