Allen Maneuver |
Other Names |
Allen Test, Hyperabduction Syndrome Test |
Examination type |
Neurological |
Patient & Body Segment Positioning |
This test
should be optimally performed with the patient sitting on a
table. The patient should have their shoulder in 90 degrees
abduction and external rotation, 90 degrees elbow flexion, and
the forearm pronated. The head is then rotated to the opposite
side of the arm being tested. |
Examiner Position |
The examiner should position themselves behind
the patient where they are able to take the radial pulse. |
Performing the Test |
The patient is seated on the table with their
shoulder in 90 degrees abduction and external rotation, 90
degrees elbow flexion, and forearm pronation. They then rotate
their head to the opposite side being tested. The examiner then
stands behind the patient and takes the radial pulse while the
patient is in that position. |
Tissues
Being Tested |
Subclavian and axillary arteries and the brachial
plexus |
Positive Test |
A positive test for thoracic outlet syndrome
when the radial pulse disappears |
Interpretation |
A positive test is present when there is
compression of the subclavian and axillary vessels or the
brachial plexus. |
Common errors in
performing exam |
A common error that could be made in this exam is
not having the patient in the proper position. Also if the
examiner is not palpating over the radial pulse then they will
not be able to tell when the radial pulse disappears. |
Factors possibly
resulting in misinterpretation |
If the patient has another problem with their
circulation other than thoracic outlet syndrome which may
result in a positive test. |
Related tests |
Other test for
thoracic outlet:
Anterior
Scalene Syndrome Test (Adson’s Test)
Costoclaicular
Syndrome (Roo’s Test)
Military Brace Position Test |
References |
Magee, David
(2002). Orthopedic Physical Assessment. Philadelphia:
Saunders. p 287.
Prentice,
William E. (2003). Arnheim’s Principles of Athletic Training:
A Competency-Based Approach (11th ed.). St.
Louis:
McGraw Hill. p 684. |
Links: |
http://www.mnsu.edu/athletictraining/ShoulderModule/Allen's%20Test.htm
http://www.visualsunlimited.com/browse/vu126/vu1263.html |
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