Continuous Positive Airway Pressure applies a constant level of pressure that splints open collapsible upper-airway structures. This reduces obstruction while the patient continues to breathe spontaneously. Unlike support that delivers mandatory breaths, CPAP does not take over the breathing cycle; its principal effect is maintaining airway patency and supporting breathing conditions.
By maintaining functional lung volume, CPAP can support gas exchange in addition to reducing upper-airway obstruction. This effect is relevant when spontaneous breathing persists but respiratory support is needed. The clinical benefit therefore depends on both airway stability and the patient’s ability to continue generating their own breaths.
Interface fit, selected pressure, monitoring, and adherence all influence CPAP performance. A mask or nasal interface must deliver the prescribed pressure while remaining tolerable for the patient. Pressure that is not appropriately selected may limit effectiveness, whereas poor fit or discomfort can reduce adherence and compromise treatment.
Initiation requires choosing an appropriate mask or nasal interface, fitting it correctly, selecting a pressure level, and monitoring the patient’s response. Clinicians also assess comfort and ongoing adherence because these affect sustained use. This workflow helps connect the mechanical delivery of pressurized air with the patient’s clinical needs.
CPAP is a first-line treatment for obstructive sleep apnea, where collapsible upper-airway structures obstruct breathing. It can also support patients with selected forms of respiratory distress, including neonatal conditions, when spontaneous breathing remains present. The method is therefore applied across sleep-related obstruction and specific respiratory-support situations.
Monitoring should address breathing, gas exchange, interface fit, pressure selection, comfort, and adherence. These factors indicate whether the system is providing useful support and whether the patient can continue treatment. Careful observation also helps minimize discomfort and complications while preserving the intended effects on airway patency and respiratory function.