Under what conditions is arterial blood gas analysis [ABG] used?

Question

Under what conditions is arterial blood gas analysis [ABG] used?

Answer 1

to test oxygenation or pH of the patient either on room air or supplemental oxygen.

You can also usually check CO levels.

You need to flush out the details yourself, if this is your homework, you need to do it yourself, it's really the best way to learn anything...