#collateral circulation

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Author Interview - Barbara Ebel - Collateral Circulation:A Medical Mystery

Author Interview – Barbara Ebel – Collateral Circulation:A Medical Mystery

Today I am bringing you an interview with my friend Barbara Ebel about her new book Collateral Circulation:A Medical Mystery, A Dr. Danny Tilson Novel.

Short author bio:

A physician, speaker, and former chemist, Barbara Ebel’s writing draws heavily from her experience as an anesthesiologist, her dealings with family court, and her interactions with people and places from around the world.

Since…

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Allen Test

Appeared in the June 2008 NP1 version of the PNLE

Before drawing ABGs from the the radial artery, perform the ALLEN TEST to assess collateral circulation.

1. Make the client's hand blanch by obliterating both the radial and the ulnar pulses. 

2. Release the pressure over the ulnar artery only.

3. If flow through the ulnar artery is good, flushing will be seen immediately. The ALLEN TEST is then POSITIVE, and the radial artery can be used for puncture.

4. If the ALLEN TEST is negative, repeat on the other arm. If this test is also negative, seek another site for arterial puncture. THE ALLEN TEST ENSURES COLLATERAL CIRCULATION TO THE HAND IF THROMBOSIS OF THE RADIAL ARTERY SHOULD FOLLOW THE PUNCTURE.