How To Do Radial Artery Cannulation - Critical Care ...
Some clinicians do the Allen test to determine whether there is sufficient collateral flow through the ulnar artery to perfuse the hand if the catheter occludes the radial artery.While the patient makes a tight fist, digitally compress both the ulnar and radial arteries. While continuing arterial compression, have the patient open the fist and spread the fingers, which should display a ...
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