The Flexion Test
by Dr. Hiltrud Strasser
The flexion test is commonly applied in lameness diagnosis. Vets have expressed various opinions about the point and value of the flexion test. Unfortunately, nobody has so far expressed thoughts on what the more or less severe lameness can then be attributed to. In my opinion, it is important for the horse owner to understand on what principle the test is based, in order to judge the situation and decide whether he wishes to continue using the horse, or is willing to take upon him the cost of treatment.
The situation is as follows:
It is common knowledge that, when bending the toe joints at a certain place,
the blood supply to the hoof is interrupted, so no blood flows into the hoof.
If there is a painful inflammation in the hoof, the lack of circulation is comfortable,
because it disables sensitivity to pain. Above the "tourniquet" location,
in the region of the navicular bone and the head of the pastern, congestion
develops. When the limb is released and takes up its normal angle, the blood
rushes into the inflamed region with increased force (congestion wave), which
is even more painful for the horse than normal circulation.
Thus the flexion test gives information if there is inflammation in the hoof
At first one does not know where the inflammation is localized. The specialist
can draw conclusions based on the shape of the hoof capsule and the way the
horse uses the foot as to whether it is a developing hoof abscess, the beginning
of coffin bone rotation, or navicular syndrome. Appropriate measures can, in
any case, lead to complete healing, so long as the cause is recognized and eliminated.
Copyright Dr. vet. med. H. Strasser
Blaihofstr. 42/1, 72074 Tuebingen, Germany
Tel/Fax: (011) 49-7071-87572
Ed. & Canadian contact: Sabine Kells at email: textorder @ shaw.ca
©2006 by The Horse's Hoof. All rights reserved. No part of these publications may be reproduced by any means whatsoever without the written permission of the publisher and/or authors. The information contained within these articles is intended for educational purposes only, and not for diagnosing or medicinally prescribing in any way. Readers are cautioned to seek expert advice from a qualified health professional before pursuing any form of treatment on their animals. Opinions expressed herein are those of the authors and do not necessarily reflect those of the publisher.
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