Pleural disease itself is an unusual cause for admission to the intensive c
are unit (ICU). Pleural complications of dis eases and procedures in the IC
U are common, however, and the impact on respiratory physiology is additive
to that of the underlying cardiopulmonary disease. Pleural effusion and pn
eumothorax may be overlooked in the critically ill patient due to alteratio
ns in radiologic appearance in the supine patient. The development of a pne
umothorax in a patient in the ICU represents a potentially life-threatening
situation. This article reviews the etiologies, pathophysiology, and manag
ement of pleural effusion, pneumothorax, tension pneumothorax, and bronchop
leural fistula in the critically ill patient. In addition, we review the po
tential complications of thoracentesis and chest tube thoracostomy, includi
ng reexpansion pulmonary edema.