Obstructive sleep apnoea (OSA) can be described as repetitive collapse and reopening of the upper airway during sleep, impairing oxygenation and resulting in intermittent hypoxemia and hypercapnia.It occurs due to obstruction caused by collapse of soft tissue structures in the oropharynx or hypopharynx.The diagnosis of OSA is based on the evaluation of clinical symptoms and risk factors, as well as a formal sleep study evaluation.This book compiles the latest approaches in treatment and management of sleep apnea.