A patient experiences repeated episodes where their airway narrows and closes during sleep, causing them to stop breathing temporarily. Analyze the specific physical principle by which a device delivering a constant stream of pressurized air would prevent these episodes.

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A common and effective treatment for mild to severe sleep apnea is the continuous positive airway pressure (CPAP) device. This apparatus consists of a mask, which can cover the nose and mouth or just the nose, connected to a pump. The pump delivers a continuous stream of air into the patient's airways, preventing them from collapsing during sleep.

Continuous Positive Airway Pressure (CPAP) as Treatment for Sleep Apnea

A significant challenge with CPAP therapy is inconsistent use by patients. This problem of poor compliance is a primary reason why researchers are actively exploring alternative treatments for sleep apnea.

Compliance Issues with CPAP Treatment

As an alternative to CPAP, the expiratory positive air pressure (EPAP) device has been developed. This newer treatment has shown promising results in double-blind trials for addressing sleep apnea.

Expiratory Positive Airway Pressure (EPAP) as an Alternative Treatment for Sleep Apnea

The provided images illustrate the components of a Continuous Positive Airway Pressure (CPAP) system. Photograph (a) shows the complete setup, which includes the air pump unit, a power adapter, a flexible hose, and the mask with its headgear. Photograph (b) offers a detailed view of a full-face mask fitted on a mannequin, secured by straps around the head.

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