Obstructive sleep apnea HP:0002870 SNOMEDCT_US:78275009 Obstructive sleep apnoea Obstructive Sleep Apnea is a condition characterized by the obstruction of the airway and pauses in breathing during sleep, which occur multiple times throughout the night. It is related to the relaxation of muscle tone that typically happens during sleep, leading to a partial collapse of the soft tissues in the airway and causing airflow obstruction. UMLS:C0520679 Sleep apnea