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Medical Health Encyclopedia
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Thoracentesis

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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. Normally, very little fluid is present in this space. An accumulation of excess fluid between the layers of the pleura is called a pleural effusion.

Alternative Names:
Pleural fluid aspiration; Pleural tap

Text Continues Below



How the test is performed:

A small area of skin on your chest or back is washed with a sterilizing solution. Some numbing medicine (local anesthetic) is injected in this area. A needle is then placed through the skin of the chest wall into the space around the lungs called the pleural space. Fluid is withdrawn and collected and may be sent to a laboratory for analysis (pleural fluid analysis).

How to prepare for the test:

No special preparation is needed before the procedure. A chest x-ray is may be performed before and after the test.

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

Infants and children:

The preparation you can provide for this test depends on your child's age, previous experiences, and level of trust. For general information regarding how you can prepare your child, see the following topics:

How the test will feel:

You will on a bed or sit on the edge of a chair or bed with your head and arms resting on a table. The skin around the procedure site is disinfected and the area is draped. A local anesthetic is injected into the skin. The thoracentesis needle is inserted above the rib into the pleural space.

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