Arterial blood gas question? Do they stick you for it?

Yes. As the name implies, an arterial blood gas is when they check your gas levels (oxygen and carbon dioxide) from the blood in your arteries. Therefore, you must be stuck with a needle in your artery (usually the radial artery for an adult). The only time you wouldn't be stuck for it is if you already have a special IV line (arterial line) in place - but then you're most likely in the icu.