A CO2 blood test measures the amount of carbon dioxide (CO2) in the blood serum, which is the liquid part of blood. It’s typically used to screen for kidney, respiratory, or metabolic disorders. You ...

A blood gas test measures oxygen and carbon dioxide levels in the blood. The test can also show blood pH levels and lung function. It is also called an arterial blood gas test or a blood gas analysis.

Alkalosis is a condition concerning the pH of your blood and fluids. It occurs when your blood pH levels are imbalanced. When your blood is too acidic, it’s called acidosis. When it’s too alkaline, it ...