In medicine, Allen's test, also Allen test, is used to test blood supply to the hand, specifically, the patency of the radial and ulnar arteries. It is performed prior to radial arterial blood sampling or cannulation.
It is named for Edgar Van Nuys Allen.
Testing for collateral circulation to the hand by evaluating the patency of the radial and ulnar arteries.
Read more about Allen's Test: The Modified Allen Test, Anatomical Basis, Significance
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“Whenever a true theory appears, it will be its own evidence. Its test is, that it will explain all phenomena.”
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