Complete or partial collapse of a lung or a section (lobe) of a lung.
Anesthesia's effect on the lungs causes almost everyone who undergoes surgery to have some atelectasis. Inhaled objects, asthma, and other lung diseases and injuries also can cause atelectasis.
There may be no obvious symptoms of atelectasis. When symptoms occur, they may include trouble breathing, cough, and low-grade fever.
Treatments include breathing exercises, medications, and surgery.