Abstract
Continuous positive airway pressure (CPAP) is a positive airway pressure (PAP) device that is commonly used to treat sleep disordered breathing (SDB) such as obstructive sleep apnea (OSA). CPAP helps to correct SDB by acting as a passive pneumatic splint for the upper airway and increasing lung volume to exert pharyngeal caudal traction, thereby stiffening the upper airway and reducing collapsibility. Despite its well-known benefits in treating SDB, overall adherence with CPAP is low, predominantly due to its side effects. Side effects are related to the pressure from CPAP (such as rhinitis and mouth dryness), the use of mask interfaces (such as claustrophobia and skin breakdown), and the machine (such as the noise and condensation). Recent advances in technology have led to the development of pressure relief mechanisms (such as C-flex® and EPR®) and auto-adjusting (APAP) machines. Pressure relief mechanisms help by reducing pressure during early exhalation, while APAP might help by reducing the mean optimal pressure required to treat SDB, thereby reducing pressure related side effects. Despite technological advances and efficacy of these devices to control SDB compared to the fixed pressure with CPAP, studies have not conclusively shown improvement in adherence.
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Ramar, K. (2012). Management of Sleep Disorders: CPAP (Continuous Positive Airway Pressure). In: Chiang, RY., Kang, SC. (eds) Introduction to Modern Sleep Technology. Intelligent Systems, Control and Automation: Science and Engineering, vol 64. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-5470-6_4
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