脑死亡患者脑电图频谱分析

Spectrum analysis of the EEG in patients with brain death

目的通过对脑死亡患者脑电图进行定量分析,寻找敏感可靠的脑死亡诊断标准。方法对17例确诊为脑死亡患者及5例临床脑死亡患者进行脑电图频谱分析,并与13例非脑死亡患者的脑电图资料进行比较。结果脑死亡组的脑电功率值显著低于非脑死亡组(均P<0.01)。临床脑死亡组脑电功率值介于脑死亡组与非脑死亡组之间,脑电功率值高者预后较好,脑电功率值低者预后较差。结论脑电图频谱分析可能对脑死亡的判断、特别是临床脑死亡患者预后的判断有一定价值。

Objective To quantify the EEG data in patients with brain death, expecting to obtain a criteria with high sensitivity and specificity for the diagnosis of brain death. Methods Analyzed the EEG data obtained from 17 brain dead cases and 5 clinical brain dead cases with spectrum analysis and made comparison with that from 13 nonbrain dead cases. Results The EEG electric power of the brain dead group was significantly lower than that of non- brain dead group （P 〈 0. 01 ）. The EEG electric power of the clinical brain dead group was higher than that of dead group, but lower than that of non-brain dead group. Higher EEG electric power implicated better prognosis while lower one was associated with poor outcome. Conclusion Spectrum analysis of the EEG may be a valuable examination for prognostic judgment of brain death ,special for judgment of outcome in clinical brain death.