An important function of the lungs is to move oxygen into the bloodstream, and remove carbon dioxide. 

A percutaneous arterial blood gas sampling, or ABG, may be requested by your physician to check for impairment, which may be a sign of breathing or other health problems.
 

What is Percutaneous Arterial Blood Gas Sampling?

In this test, blood is drawn from an artery to find out how well your lungs are functioning. The blood is then sent to a lab to be analyzed.
 

How to Prepare for Your Test

On the day of the procedure, be sure to drink plenty of fluids, unless restricted by your physician.