Which of the following are the most common sites for the percutaneous sampling of arterial blood for blood gas analysis?
1. Earlobe
2. Radial artery
3. Brachial artery
4. Side of the heel
a. 1 and 2 c. 3 and 4
b. 2 and 3 d. 1 and 4
ANS: B
Specimens for arterial blood gas analysis can be drawn from a peripheral artery by means of a percutaneous needle puncture or from an indwelling intravascular cannula. Blood is most often drawn from the radial, brachial, or femoral arteries or the dorsalis pedis artery of the foot.
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