视频脑电图与发作期SPECT对痫灶定位的对比研究

目的 探讨视频脑电图(VEEG)、发作期SPECT在术前痫灶定位中的作用.方法 回顾性对比分析48例难治性癫痫患者术前所行长程VEEG与发作期SPECT定位的情况,比较两者定位的一致性.结果 发作期SPECT定位阳性率为94%,VEEG为96%.两者完全一致占46%,部分一致占29%,完全不一致占25%.阳性率及定侧率差异无统计学意义(P＞0.05),局灶定位差异有统计学意义(P＜0.01).随访结果显示48例患者中Engel Ⅰ级27例,Ⅱ级10例,Ⅲ级8例,Ⅳ级3例;其中EngelⅠ～Ⅱ级的37例中33例来自两者定位一致的患者.结论 发作期SPECT与VEEG检查有较高的一致性,两者联合应用优势互补,可提高定位准确性,获得良好的手术疗效.

Comparative study of ictal SPECT and video EEG on localization of epileptogenic foci for intractable epilepsy

Objective To investigate the value of ictal single photon emission computed tomography and VEEG in localization of epileptogenic foci for intractable epilepsy. Method The data of ictal SPECT and VEEG were reviewed from 48 patients with intractable epilepsy, all the results were analyzed and compared with each other. Surgical treatment were performed on 48 cases. Results The positive rate of ictal SPECT and VEEG localization was 94% and 96% respectively. The rate of complete coincidence of the two methods was 46% (22/48), partial coincidence was 29% (14/48). Comparing ictal SPECT with video EEG in the ratio of lateral and focal epileptic foci localization, twenty - seven of 48 patients had an Engel Class Ⅰ outcome after surgery and an additional ten patients had rare seizure (Engel Class Ⅱ), and eight patient had a decrease in seizure frequency (Engel Class Ⅲ) , no marked chang (Engel Class Ⅳ) in three patients. In Engel Class Ⅰ and Class Ⅱ outcome cases, there were 33 (out of 37) cases came from its coincidence of ictal SPECT and VEEG localization. Conclusions VEEG combined with ictal SPECT can increase the accuracy on localization of epileptogenic foci for intractable epilepsy.