What is the function of CPAP and BiPAP machines?

CPAP (Continuous Positive Airway Pressure) and BiPAP (Bilevel Positive Airway Pressure) machines are specifically designed to assist individuals with respiratory difficulties by providing positive airway pressure to keep the airways open during sleep. The primary function of these machines is to support breathing by delivering air at a prescribed pressure to prevent airway collapse, particularly in conditions such as obstructive sleep apnea.

CPAP machines deliver a constant level of positive pressure throughout the breathing cycle, while BiPAP machines offer varying pressures for inhalation and exhalation, making them suitable for patients who find it difficult to exhale against a continuous pressure. By supporting breathing in this way, these devices reduce the work of breathing, improve oxygenation, and enhance overall respiratory function during sleep.

In contrast, the other options focus on different functions that are not related to the primary role of CPAP and BiPAP machines. Monitoring cardiac activity is not a function of these devices, and while they may indirectly support oxygenation, their main role is to assist with breathing. Detecting hypoxemia is a diagnostic function that typically requires different types of equipment like pulse oximeters, rather than the therapeutic focus of CPAP and BiPAP.