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Obesity-hypoventilation Syndrome A condition of obese individuals which is characterized by severe OSA and daytime hypoventilation (hypercapnia) despite relatively normal pulmonary function; Also know as Pickwickian syndrome
Obstructive Apnea Cessation of airflow into or out of the mouth or nose although efforts to breathe continue
Obstructive Sleep Apnea (OSA) A life threatening and life altering condition that causes a person to stop breathing repeatedly during sleep due to obstruction of the airway by excess tissue in the back of the throat; Cessation of breathing during sleep, due to a mechanical obstruction, such as a semi-collapsed trachea, tongue relaxed to back of the throat, or a large amount of tissue in the uvula area