You may feel a slight prick when the needle breaks the skin. Since arteries are slightly thicker than veins (they have more smooth muscle layers), an arterial blood draw may hurt a bit more than a ...
Blood gas tests measure the amount of atmospheric gases—usually oxygen and carbon dioxide—in the bloodstream by drawing blood from the arteries. Most other blood tests draw blood from the veins, which ...
How To Do Everything Half advice show. Half survival guide. Half absurdity-fest. (Wait, how does this work again? We're not numbers people.) Each episode, we answer all your burning questions ...