Final answer:
Thoracentesis, also called a pleural tap, is a medical procedure used to remove excess fluid from the pleural cavity in order to improve lung function and relieve symptoms.
Step-by-step explanation:
The procedure described in the question is known as thoracentesis, also called a pleural tap. It is a medical procedure used to remove excess fluid from the pleural cavity, the space surrounding the lungs. In this procedure, a needle is inserted through the chest into the pleural cavity, and the fluid is withdrawn using a syringe or vacuum container.
It is commonly used for diagnostic purposes, to determine the cause of fluid accumulation, or for therapeutic purposes, to relieve symptoms and improve lung function.