What is the rationale for performing the Allen test?
A) to test for the possibility of edema
B) to determine whether the patient has high blood pressure
C) to determine that the radial and ulnar arteries are providing collateral circulation
D) to determine whether the carbon dioxide concentration in the radial and ulnar arteries is elevated

Question

Quizplus · Accepted Answer

The Allen test is performed to ensure that both the radial and ulnar arteries are providing adequate collateral circulation to the hand. This is important before procedures that might compromise blood flow through one of these arteries, such as arterial blood gas sampling from the radial artery.

What Is the Rationale for Performing the Allen Test