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Thoracentesis

Definition:

Thoracentesis is a procedure to remove fluid from the space between the lining of the outside of the lungs (pleura) and the wall of the chest.



Alternative Names:

Pleural fluid aspiration; Pleural tap



How the Test is Performed:

The test is done in the following way:

  • You sit on a bed or on the edge of a chair or bed. Your head and arms rest on a table.
  • The skin around the procedure site is cleaned. A local numbing medicine (anesthetic) is injected into the skin.
  • A needle is placed through the skin and muscles of the chest wall into the space around the lungs, called the pleural space.
  • Fluid is drawn out with the needle.
  • The fluid may be sent to a laboratory for testing (pleural fluid analysis ).


How to Prepare for the Test:

No special preparation is needed before the test. A chest x-ray will probably be done before and after the test.

Do not cough, breathe deeply, or move during the test to avoid injury to the lung.



How the Test will Feel:

You will feel a stinging sensation when the local anesthetic is injected. You may feel pain or pressure when the needle is inserted into the pleural space.

Tell your health care provider if you feel short of breath or haveĀ chest pain .



Why the Test is Performed:

Normally, very little fluid is in the pleural space. A buildup of too much fluid between the layers of the pleura is called a pleural effusion .

The test is performed to determine the cause of the extra fluid, or to relieve symptoms from the fluid buildup.

The test may be also performed for the following conditions:



Normal Results:

Normally the pleural cavity contains only a very small amount of fluid.



What Abnormal Results Mean:

Testing the fluid will help your health care provider determine the cause of pleural effusion. Possible causes include:

If your health care provider suspects that you have an infection, a culture of the fluid may be done to test for bacteria.



Risks:

Risks may include any of the following:



Considerations:

A chest x-ray is done after the procedure to detect possible complications.



References:

Broaddus C, Light RW. Pleural effusion. In: Mason RJ, Broaddus CV, Martin TR, et al, eds. Textbook of Respiratory Medicine. 5th ed. Philadelphia, PA: Saunders Elsevier; 2010:chap 73.

Celli BR. Diseases of the diaphragm, chest wall, pleura, and mediastinum. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 24th ed. Philadelphia, PA: Saunders Elsevier; 2011:chap 99.




Review Date: 8/30/2014
Reviewed By: Denis Hadjiliadis, MD, Associate Professor of Medicine, Pulmonary, Allergy, and Critical Care, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

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Atlantic Medical Group
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Morristown Medical Center

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

Overlook Medical Center

99 Beauvoir Avenue
Summit, NJ 07901
908-522-2000

Newton Medical Center

175 High Street
Newton, NJ 07860
973-383-2121

Chilton Medical Center

97 West Parkway
Pompton Plains, NJ 07444
973-831-5000

Goryeb Children's Hospital

100 Madison Avenue
Morristown, NJ 07960
973-971-5000

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