Figure Legend: Allen's type of testing may be performed on each digit to confirm patency of each digital artery.  The finger is exsanguinated with distal to proximal massage, and then one of the digital arteries is released and pattern of refill observed.  This can be helpful as an adjunct test for valuation of possible digital nerve injuries, as digital nerves are superficial to digital arteries, and digital artery injury from a penetrating wound has a high likelihood of associated digital nerve injury.
 

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