A patient is scheduled for a radical neck dissection and removal of a malignant tumor of the jaw. A radial graft is to be performed, so an Allen test must be done on the donor arm. What is the Allen test performed for?
A) To ensure that the ulnar artery is patent and can supply blood to the hand
B) To ensure that the radial artery is patent and can supply blood to the hand
C) To ensure that the brachial artery is patent and can supply blood to the hand
D) To ensure that the popleteal artery is patent and can supply blood to the hand
Ans: A
Feedback: If a radial graft is to be performed, an Allen test on the donor arm must be performed to ensure that the ulnar artery is patent and can provide blood flow to the hand after removal of the radial artery. The brachial artery is not involved in this procedure. The popleteal artery is in the leg, not the arm.
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