Obstructive Sleep Apnoea (OSA) What is Obstructive Sleep Apnoea (OSA)? Obstructive sleep apnoea (OSA) is a potentially serious sleep disorder in which breathing repeatedly stops and starts during sleep. OSA is a serious and lifelong medical condition that affects between 18 and 30 million adults over 18 in the US; with approximately 90% of them undiagnosed. OSA is a … Continue reading Obstructive sleep apnoea