Which type of sleep apnea increases episodes specifically when the patient is sleeping on their back?

Positional obstructive sleep apnea refers to a form of obstructive sleep apnea where the severity of apnea episodes is notably influenced by the patient's sleeping position, particularly when they are on their back. When lying supine, gravity can cause the tongue and soft tissues in the throat to collapse into the airway more easily, leading to increased obstruction and subsequent apneic episodes.

This relationship between sleeping position and apnea episodes is well-documented, with patients often experiencing significantly fewer or less severe apneas when they sleep on their sides. Identifying this specific type of apnea is crucial for tailoring treatment options, which may include positional therapy that encourages side-sleeping to reduce the frequency of apnea events.