Laboratory test to determine the amount of oxygen and carbon dioxide in the blood.


... Why get tested?
To determine if you have an imbalance in the amount of oxygen gas (O2) or carbon dioxide gas (CO2) in your blood or an acid-base imbalance, which may indicate a respiratory (lung/breathing), metabolic, or kidney disorder

When to get tested?
If your doctor suspects that you have symptoms of an oxygen/carbon dioxide imbalance or an acid-base imbalance; symptoms include difficulty breathing, shortness of breath, or rapid breathing (hyperventilation); may also be tested to monitor the effectiveness of ongoing oxygen therapy (used when you have a condition that causes an acute or chronic oxygen shortage) and during certain surgeries to monitor your blood’s oxygen and carbon dioxide levels

Sample required?
A blood sample collected from an artery, usually the radial artery in the wrist (located on the inside of the wrist, below the thumb, where you can feel your pulse); capillary blood from a heelstick may be used for babies
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