Equine Musculoskeletal Problems

Equine Musculoskeletal Problems - Equine Musculoskeletal...

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Equine Musculoskeletal Problems VS 441
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Laminitis An inflammatory condition resulting from disruption of blood flow to laminae of foot Severe cases result in loss of integrity of laaminae, disruption of suspension of coffin bone within hoof —”founder”
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Laminitis Disruption of laminae results in either rotation or sinking of coffin bone within hoof capsule Front feet most commonly affected, but may occur in all 4
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Laminitis Precipitating factors Virtually any significant insult to system Prolonged high fever Grain overload Lush pasture--fructans Corticosteroids Black walnut shavings Often accompanies retained placenta, colic surgery, anterior enteritis, pleuritis “Mechanical founder” Contralateral limb lameness Work on extremely hard surfaces
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Laminitis Can be divided into developmental, acute, and chronic phases Developmental--largely inapparent Current research indicates involvement of metalloproteinases Arguments over vasodilation vs. vasoconstriction during this phase Acute—24-72 hours after initial insult to tissue Onset of clinical signs Chronic—defined as 48 hours post onset of clinical signs, or after rotation/sinking of P3
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