Which Nursing Actions Are Appropriate When Conducting an Allen Test

Which nursing actions are appropriate when conducting an Allen test? Select all that apply.

A) Rest the patient's arm on the mattress.
B) Support the patient's wrist with a rolled towel.
C) Tell the patient to relax the hand and then clench a fist.
D) Ensure that a second nurse is available to assist with the procedure.
E) Press the patient's radial and ulnar arteries using the index and middle fingers.