Thoracentesis

Thoracentesis is a procedure to remove excess fluid in the space between the lungs and the chest wall.This space is called the pleural space. Normally, the pleural space is filled with a small amount of fluid—about 4 teaspoons full. Some conditions, such as heart failure, lung infections, and tumors, can cause more fluid to build up. When this happens, it’s called a pleural effusion. A lot of extra fluid can press on the lungs, making it hard to breathe.

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