What is the rationale for performing the Allen test?
a. to determine whether the patient's blood pressure is too high
b. to test for a possible hematoma
c. to determine that the radial and ulnar arteries are providing collateral circulation
d. to determine whether the oxygen concentration in the radial artery is sufficient for
blood collection
Question 2
A needle is usually more appropriate for the elderly patient's fragile veins.
Fill in the blank with correct word.