When performing an Allen test on the left hand of a patient, you notice that the palm, fingers, and thumb remain blanched for more than 15 sec after pressure on the ulnar artery is released. What should you do?
a. Use the brachial site for sampling.
b. Sample from the contralateral radial artery.
c. Use the femoral site for sampling.
d. Perform the Allen test on the right hand.
ANS: D
Box 19-2 outlines the basic procedure for radial artery puncture of adults.
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