... Faculty, Selcuk University, Konya, Turkey. 3. Department of Biochemistry, Meram Medical Faculty, Selcuk University, Konya, Turkey. 4. Department of Pulmonary Medicine, Meram Medical Faculty, Selcuk ... events in patients with OSA are not well understood. Arousal, in the absence of hypercapnia or hypoxia, has been reported to be associated with an acute increase in sympathetic activity [4]. ... de-termined with Antioxidant Assay Kit (Cayman Chemical Company, USA). The assay relies on the ability of antioxidants in the sample to inhibit the ox-idation of ABTS® (2,2'-azino-di-[3-ethylbenzthiazoline...