What medical term is used to describe a lack of normal lung expansion?

Atelectasis is the medical term used to describe a condition where there is a lack of normal lung expansion, leading to partial or complete collapse of the lung or a segment of the lung. This condition can occur for various reasons, such as blockage of the air passages, fluid in the lungs, or pressure from outside the lung, preventing it from fully expanding during inhalation.

Proper lung expansion is crucial for effective gas exchange, and any impairment can result in decreased oxygen levels and other respiratory issues. Understanding atelectasis is essential in the context of respiratory health, as it can exacerbate existing lung diseases or create complications following surgery or immobility. Other terms in the list, while related to lung health, refer to different conditions that do not specifically focus on the lack of normal lung expansion.