Allen Test: "Hold patient's hand with palm up. Have patient clench and unclench hand while occluding radial and ulnar arteries. The hand will become pale. Lower the hand and have patient relax the hand. While continuing to hold radial artery, release pressure on ulnar artery. Brisk return of color (5 to 7 seconds) demonstrates adequate ulnar blood flow. If pallor persists for more than 15 seconds, ulnar flow is inadequate and radial artery cannulation should not be attempted." - Jarvis

Allen Test: "Hold patient's hand with palm up. Have patient clench and unclench…

Allen's Test for thoracic outlet syndrome

Allen's Test is an orthopedic maneuver used to help diagnose thoracic outlet syndrome and is considered positive if the radial pulse on the affected side dim.

Leslie Allen.    Testing Limits , 2011 Formatting  Painting    48 x 36 in  oil on canvas over panel

Leslie Allen Testing Limits is an abstract oil painting showing at Seager Gray Gallery located in Mill Valley California San Francisco Bay Area

How to Perform a Modified Allen's Test - YouTube

The modified Allen's test is a test to determine the patency of the collateral arterial blood supply to the hand - it is performed especially before drawing .

Allen’s Test - a check for alternative circulation  Apply pressure to client’s ulnar and radial arteries at the SAME TIME; ask client to open and close hand, hand should blanch; release the pressure from the ulnar artery while continuing to compress the radial artery. Assess the color in the extremity distal to the pressure point - pinkness should return within 6 seconds [indicating that the ulnar artery is sufficient to provide hand with adequate circulation if radial artery is

“ Allen’s Test - a check for alternative circulation Apply pressure to client’s ulnar and radial arteries at the SAME TIME; ask client to open and close hand, hand should blanch; release the pressure from the ulnar artery while continuing to compress.

cxlxmxrx: Images of positive Allen test due to lack of collateral circulation

Images of positive Allen test due to lack of collateral circulation

Blood supply to the hand (superficial arch primarily supplied by Ulnar artery)(deep arch primarily supplied by Radial artery)

Blood supply to the hand (superficial arch primarily supplied by Ulnar artery)(deep arch primarily supplied by Radial artery)

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