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Definition Return to top
Empyema is a collection of pus in the space between the lung and the inside of the chest wall (pleural space).
Causes Return to top
Empyema is caused by an infection that spreads from the lung. It leads to a buildup of pus in the pleural space.
There can be a pint or more of infected fluid. This fluid puts pressure on the lungs.
Risk factors include:
In rare cases, empyema can occur when a needle is inserted through the chest wall to draw off fluid in the pleural space (thoracentesis)
Symptoms Return to top
Exams and Tests Return to top
The health care provider may note decreased breath sounds or a friction rub when listening to the chest with a stethoscope (auscultation).
Tests may include the following:
Treatment Return to top
The goal of treatment is to cure the infection and remove the collection of pus from the lung. Antibiotics are prescribed to control the infection.
The health care provider will place a chest tube to completely drain the pus. A surgeon may need to perform a procedure to peel away the lining of the lung (decortication) if the lung does not expand properly.
Outlook (Prognosis) Return to top
When empyema complicates pneumonia, the risk of permanent lung damage and death goes up. Patients will need long-term treatment with antibiotics and drainage. However, most people fully recover from empyema.
Possible Complications Return to top
When to Contact a Medical Professional Return to top
Call your health care provider if you develop symptoms of empyema.
Prevention Return to top
Prompt and effective treatment of lung infections may prevent some cases of empyema.
References Return to top
Celli BR. Diseases of the diaphragm, chest wall, pleura, and mediastinum. In: Goldman L, Ausiello D, eds. Cecil Medicine. 23rd ed. Philadelphia, Pa: Saunders Elsevier;2007:chap 100.
Mason RJ, Broaddus VC, Murray JF, Nadel JA. Pleural effusion. In: Mason RJ, Broaddus VC, Murray JF, Nadel JA, eds. Murray and Nadel's Textbook of Respiratory Medicine. 4th ed. Philadelphia, Pa: Saunders Elsevier; 2005:chap 68.Update Date: 3/17/2009 Updated by: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; and Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School, Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.