What is the mechanism by which CPAP therapy helps in respiratory conditions?

CPAP therapy, or Continuous Positive Airway Pressure, primarily operates by delivering a continuous flow of air at a predetermined pressure, which helps keep the airways open during both inhalation and exhalation. When a patient exhales against this positive pressure, the airways remain open, preventing collapse and ensuring that the patient can maintain more effective breathing patterns. This mechanism is particularly beneficial for individuals with obstructive sleep apnea and other respiratory conditions where airway obstruction can lead to difficulties in airflow.

This positive pressure also aids in preventing respiratory distress by improving ventilation, allowing for better gas exchange within the lungs. While it does contribute to maintaining adequate levels of oxygen in the blood, the key mechanism is keeping the airways patent through the resistance created during exhalation. Other options may touch on aspects of oxygenation or pressure settings, but they do not encompass the core functioning of CPAP therapy as accurately as the mechanism described.