@article{Alastruey:2006:10.1080/10255840600985477,
author = {Alastruey, J and Parker, KH and Peiró, J and Sherwin, SJ},
doi = {10.1080/10255840600985477},
journal = {Comput Methods Biomech Biomed Engin},
pages = {353--361},
title = {Can the modified Allen's test always detect sufficient collateral flow in the hand? A computational study.},
url = {http://dx.doi.org/10.1080/10255840600985477},
volume = {9},
year = {2006}
}

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TY  - JOUR
AB  - Blood flow in the largest arteries of the arm up to the digital arteries is numerically modelled using the one-dimensional equations of pressure and flow wave propagation in compliant vessels. The model can be applied to different anatomies of arterial networks and can simulate compression of arteries, these allowing us to simulate the modified Allen's test (MAT) and to assess its suitability for the detection of sufficient collateral flow in the hand if radial blood supply is interrupted. The test measures blood flow in the superficial palmar arch before and during compression of the radial artery. The absence of reversal flow in the palmar arch with the compression indicates insufficient collateral flow and is referred to as a positive MAT. This study shows that small calibres of the superficial palmar arch and insufficient compression of the radial artery can lead to false-positive results. Measurement of the drop in digital systolic pressures with compression of the radial artery has proved to be a more sensitive test to predict the presence of sufficient ulnar collateral flow in networks with small calibres of the superficial palmar arch. However, this study also shows that digital pressure measurements can fail in detecting enough collateral flow if the radial artery is insufficiently compressed.
AU  - Alastruey,J
AU  - Parker,KH
AU  - Peiró,J
AU  - Sherwin,SJ
DO  - 10.1080/10255840600985477
EP  - 361
PY  - 2006///
SN  - 1025-5842
SP  - 353
TI  - Can the modified Allen's test always detect sufficient collateral flow in the hand? A computational study.
T2  - Comput Methods Biomech Biomed Engin
UR  - http://dx.doi.org/10.1080/10255840600985477
UR  - https://www.ncbi.nlm.nih.gov/pubmed/17145669
UR  - http://hdl.handle.net/10044/1/825
VL  - 9
ER  - 

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