What does PEEP stand for in mechanical ventilation?

PEEP stands for Positive End-Expiratory Pressure. This term is critical in mechanical ventilation as it refers to a mode of mechanical ventilation where a pressure is maintained in the airways at the end of expiration. This helps to prevent the collapse of the alveoli, enhancing lung recruitment and improving oxygenation by increasing functional residual capacity. The use of PEEP can improve the overall efficiency of gas exchange and respiratory mechanics, making it an essential component in the management of patients with respiratory failure or other conditions that affect lung function.

The other choices do not accurately represent the established terminology used in respiratory therapy. Positive End-Expiration Pressure, while sounding plausible, is not the correct term; the word “expiratory” is not synonymous with “expiration.” The option related to "Pressure Evaluating End-Expiratory" does not convey a recognized concept in mechanical ventilation and lacks established usage in clinical practice. Lastly, "Pulmonary End-Expiratory Pressure" introduces an unnecessary term (“pulmonary”) that is not part of the official definition of PEEP. Understanding the correct terminology ensures effective communication and application of concepts in clinical practice.