CLINICAL DO'S & DON'TS: Performing a modified Allen test

October 2005 
Volume 35  Number 10
Pages 26 - 26
  PDF Version Available!


USE THE MODIFIED Allen test to assess the integrity of the ulnar artery before your patient undergoes radial artery puncture or cannulation. You must verify ulnar collateral circulation to ensure blood flow to the hand if embolization or a thrombus occludes the radial artery.

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