What test is most commonly used to assess the collateral circulation of the radial artery?

Question

Quizplus · Accepted Answer

The Modified Allen test is the most commonly used test to assess the collateral circulation of the radial artery. The test is performed by occluding both the radial and ulnar arteries and then releasing pressure from the ulnar artery while observing the color of the hand. If the hand turns pink within 5-10 seconds, it indicates adequate collateral circulation and the radial artery can be safely used for procedures such as arterial blood gas sampling or arterial line placement.

What Test Is Most Commonly Used to Assess the Collateral