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بسم الله الرحمن الرحيم. Thoracic limb. Podotrochlear bursa(navicular bursa). It is found between the terminal part of the tendon of deep digital flexor muscle and the distal sesamoid bone. Navicular syndrom. Navicular Syndrome is a soundness problem in horses, and not an actual disease.
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Podotrochlear bursa(navicular bursa) It is found between the terminal part of the tendon of deep digital flexor muscle and the distal sesamoid bone.
Navicular syndrom Navicular Syndrome is a soundness problem in horses, and not an actual disease. It is acommon cause of lameness in horse. Causes: *The oldest idea of cause is that the navicular bone undergoes changes which bring about pathology and pain in the area. *Reduced blood supply to the inner part of the bone.(popular adecade ago).
*The navicular bursa was at fault. *Some cases of navicular syndrome are caused by pathology in the coffin joint. Symptoms: _While walking, the horse tends to place its weight on the toe to avoid pressure on the heel area which contains the inflamed Navicular Bone and Bursa.Since the horse does not place weight on its heel, it will take longer to stop. Consequently, more pressure is placed upon the Navicular Bone.Which causes acontracted foot.
_While standing, , the horse tends to shift its weight continuously. This relieves pressure and the pain on its heel. _Lameness and pain are usually mild but worsen when the horse is worked on a circle. The lameness may disappear after arest. _after several months of pain, the feet may begin to change shape, tends to become more upright and narrow. Diagnosis: 1-Many veterinarians use hoof testers. 2-A locally injected anesthetic.
Methode of treatment . Many horses with this condition are commonly treated with anti-inflammatories, shoeing changes, and injection of the distal interphalangeal joint. However, some of these horses do not respond to these normal therapies. In the past these are the cases that would be considered for a neurectomy in which the nerves to the heel are cut to stop the pain. This surgery can be effective but also can have dangerous consequences.
But now Another option found, (It is the navicular bursal injection.) .The vets at Texas A&M performed a study on 25 horses that did not respond to other conventional treatments for navicular syndrome. All 25 horses received injections of cortisone and hyaluronic acid directly into the navicular bursa. 80% of these horses returned to their intended activities within 2 weeks. 56% of these horses were still being used 1 to 3 years later but required periodic navicular bursal injection.
Precautions: 1-To work on shoeing the horse correctly. 2-By cutting the toe short. 3-Allowing the horse to breakover sooner. Prepared by:Asmaa Elbohy. Thanks