A case of epileptic wave associated with SAS at PSG

Abstract

　Sleep apnea syndrome (SAS) is a common disorder. In the case of suspected SAS, the general treatments have included the doctor's interview, a screening test with a portable device and overnight polysomnography (PSG) as necessary. In Japan, in terms of implementation and adaptation of continuous positive airway pressure (CPAP), the apnea hypopnea index (AHI)≧40 was calculated using portable monitoring, and an AHI≧20 using PSG. However, portable monitoring cannot detect other sleep disorders which exist with SAS. It is preferable to have PSG which includes brain wave, electromyogram and electrooculogram findings. In this study, we identified a case of epileptic wave associated with SAS by means of PSG. In addition to SAS, an electroencephalographic abnormality was observed on PSG after portable monitoring, and electroencephalography diagnosed idiopathic generalized epilepsy. Therefore, it should be borne in mind that there is possibility of other sleep disorders occurring concomitantly with SAS.