Inclusion Criteria:  Patients aged 19 to 60 years diagnosed with moderate to severe obstructive sleep apnea.  Exclusion Criteria:  When instructions cannot be performed due to dementia, mental illness, etc. Others who have comorbidities (e.g., malignant tumors, severe renal/liver/lung diseases, blood clotting abnormalities, etc.) that are unsuitable for participation in clinical trials as judged by the researcher.