What does PEEP stand for in mechanical ventilation?

PEEP stands for Positive End-Expiratory Pressure in mechanical ventilation. This term refers to the pressure that remains in the airways at the end of expiration, which helps to prevent the collapse of the alveoli. By keeping the alveoli open, PEEP improves oxygenation and enhances lung compliance. The application of PEEP ensures that there is a baseline pressure that favors gas exchange during the next inhalation, thereby reducing the work of breathing and improving overall respiratory function.

The other options presented do not accurately define PEEP. They either rearrange the terms incorrectly or introduce concepts that do not align with established definitions in respiratory therapy and mechanical ventilation.