Inclusion Criteria:  Age > 18 years old. Getting a diagnosis of OSAS with polysomnography. Agree to participate in the study.  Exclusion Criteria:  Having respiratory system disease (COPD, asthma, bronchiectasis, lung cancer, etc.). Sedative, hypnotic drug intake. Use of medical supplements such as diazepam. Hypothyroidism, acromegaly. Diagnosis of a psychiatric illness. Uncontrolled arrhythmia causing symptoms or hemodynamic impairment. Pulmonary edema. Pregnancy