Pathophysiology and Prevention of Intraoperative Atelectasis: A Review of the Literature

Atelectasis is a common problem in the perioperative setting, affecting a significant number of surgical patients receiving general anesthesia. Absorption, compression, and reduced surfactant are the three mechanisms implicated in the etiology of atelectasis. Interventions designed to minimize the risk of intraoperative atelectasis such as positioning, positive end-expiratory pressure, and administration of the least amount of fraction of inspired oxygen can be used to maintain patency of small airways and ultimately improve gas exchange in the surgical patient.