Obstructive sleep apnea (OSA) consists of multiple episodes of partial or complete closure of the upper airway that occur during sleep, leading to breathing cessation lasting more than ten seconds and sometimes even several minutes, followed by arousals and deep breathing. Symptoms include lack of concentration, fatigue and excessive daytime sleepiness, all of which lower the quality of life and can be incapacitating. Untreated patients are at risk for hypertension, cardiovascular disease, heart failure and diabetes, among other health problems, as well as poor memory and concentration.

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