Pulmonary Edema | Symptoms, Causes and Treatment

2. Acute Respiratory Distress Syndrome

Acute respiratory distress syndrome or ARDS occurs mainly in critically-ill patients in the ICU. The most common cause of this condition is a severe infection of the bloodstream. A lung infection or pneumonia is another cause. Damage to the delicate membranes around the air sacs allows fluid to come in, making it difficult for oxygen to enter the blood.