|  | Conditions Treatments | Blood Disorders

What Is Blood Gas?

According to the National Institutes of Health (NIH), blood gas is "a measurement of how much oxygen and carbon dioxide is in your blood. It also determines the acidity (pH) of your blood."

  1. Why Doctors Order Blood Gas Tests

    • Your doctor will order a blood gas test to help assess the condition of your lungs and respiratory system. The test determines whether oxygen therapy is effective. It provides information about kidney function and the metabolic state of your body.

    Significance

    • Blood gas tests provide vital information to your physician so he or she may prescribe the right treatment for your condition.

    Preparation for a Blood Gas Test

    • You do not need to do anything special before having a blood gas test. Patients using oxygen assistance must have the same concentration of oxygen in their blood for the 20 minutes preceding a blood gas test.

    How Blood Gases Tests Are Done

    • The health-care provider will swab the spot with an alcohol pad before the test. He or she will use a small syringe to draw blood from an artery in your wrist, groin or arm. You may ask for medicine to numb the area where the needle will go.

    Effects after a Blood Gas Test

    • You may experience a throbbing sensation or some cramps after the blood gas test; however, the pain will not last long. If you have severe pain after the test, you should contact your physician.

Blood Disorders - Related Articles