Apnea is defined as a cessation of oronasal airflow of at least 10 seconds in duration. When it occurs 30 or more times during a 7-hour period of nocturnal sleep, it is called obstructive sleep apnea (OSA) and requires immediate intervention to prevent it from becoming life-threatening.

In the most common form of the condition - obstructive apnea (also called upper airway apnea) - air stops flowing through the nose and mouth, but throat and abdominal breathing efforts are uninterrupted. The snori...