Before performing puncture or cannulation of the radial artery, what should you do?

Question

Quizplus · Accepted Answer

Before performing puncture or cannulation of the radial artery, it is recommended to perform the Allen test to ensure that there is adequate collateral circulation to the hand in case the radial artery becomes obstructed. This involves occluding both the radial and ulnar arteries and observing the hand for blanching, then releasing pressure on the ulnar artery to observe for reperfusion. If the hand does not reperfuse within 5-7 seconds, it may indicate inadequate collateral circulation and an alternate site for cannulation or puncture should be chosen.

Before Performing Puncture or Cannulation of the Radial Artery, What