Before performing puncture or cannulation of the radial artery, what should you do?
A) Fix and tighten a tourniquet above the antecubital fossa.
B) Perform the Allen test to ensure collateral circulation.
C) Inject heparin into the adjoining subcutaneous tissues.
D) Apply firm pressure to the arterial site for 5 min.

Question

Quizplus · Accepted Answer

Before performing puncture or cannulation of the radial artery, it is important to perform the Allen test to ensure that there is adequate collateral circulation in the hand. This is done by compressing both the ulnar and radial arteries and having the patient make a fist. Then, one artery is released while observing the color and filling of the palm. If the palm remains well-perfused, it indicates that the released artery has adequate collateral circulation and is safe for puncture or cannulation. This is important to prevent ischemia or damage to the hand.

Before Performing Puncture or Cannulation of the Radial Artery, What