The brochure is intended for patients undergoing CPAP/BIPAP therapy at home. It may also be of interest to attending physicians who observe these patients in outpatient settings or in a hospital. The expert opinion of Buzunov R.V. is based on 18 years of experience and personal participation in CPAP/BIPAP therapy in more than 2000 patients with obstructive sleep apnea syndrome and/or chronic nocturnal hypoxemia. Currently, his department oversees more than 5,000 patients undergoing long-term CPAP/BIPAP therapy at home. The department is the largest center in Russia for the treatment of sleep-disordered breathing, which operates 7 days a week around the clock. It employs 5 doctors and 6 nurses.