Application of pattern plastic plate and red color stimulation in continuous video-electroencephalography monitoring

Abstract

Objective To evaluate the clinical efficiency of intermittent photic stimulation (IPS) with pattern and red color plastic plates in video-electroencephalography(EEG). Methods Three hundred and fifty-eight patients hospitalized in Wuhan Children's Hospital from March 2013 to March 2014 were selected, and they were exa-mined by using stroboscope with a red plastic plate, a dots printed plastic plate, and ordinary white flicker for photic driving response (PDR), photoparoxysmal responses (PPR), photoconvulsive response (PCR). The results of patients with PDR, PPR, PCR were analyzed. Results The PDR synchronously evoked by the three flickering patterns were in 29 cases, and the amplitude of photic drivings evoked by ordinary white flicker and red flicker were higher than that of flickering dot pattern[(30.294±7.767)μV, (31.103±8.920)μV vs(24.436±8.075)μV], and there were significant differences(t=2.983, 2.815, P=0.003, 0.008). However, there was no significant difference between ordinary white flicker and red flicker (t=0.368, P=0.710). The PPR evoked were in 17 cases, and 16 cases (94.12%) of them were evoked by red color, while 10 cases (58.82%) were evoked by white light, and 1 case only evoked by flic-kering dot pattern.However, stronger intensity and longer duration time of PPR were evoked by red color than by white light.In 3 patients with positive PCR, the epileptic seizure was more likely to be evoked by red color or pattern plastic plate. Conclusions IPS with red and pattern plastic plate is more potent in eliciting photosensitive epilepsy in video-EEG than the ordinary white light.Moreover, it could reduce the discomfort of eyes without influencing PDR in comparison to the ordinary white light. Key words: Intermittent photic stimulation; Video-electroencephalography; Photosensitive epilepsy; Red color plastic plate; Pattern plastic plate