Presentation on theme: "Laminitis means inflammation of the laminae. The laminae is a layer of tissue that carries blood to all the components of the hoof. The laminae attach."— Presentation transcript:
Laminitis means inflammation of the laminae. The laminae is a layer of tissue that carries blood to all the components of the hoof. The laminae attach to the hoof wall and to the coffin bone. Laminitis is a result of problems in these connective sites.
Fig.6 Cross section of equine limb
Fig.7 The horny hoof wall from a horse. The white arrow identifies a vertical groove of horny lamina that interlocks with the sensitive lamina.
Acute laminitis is defined as: The initial onset of laminitis and lasts for variable periods of time, may progress to chronic laminitis. Chronic stable laminitis is defined as: Laminitis that the coffin bone becomes stable. Healing has begun. Chronic unstable laminitis is defined as: Laminitis that requires frequent and prolonged treatment because the coffin bone continues to rotate and or sink.
Causes Excess of carbohydrates (To much grain, lush pastures) Mechanism of reaction cell wall of Gr v – bacteria Vasoactive lipopolysaccharides (endotoxin) Circulation causing systemic effect Laminitis bacterial balance within the cecum primarily Lactobacillus and streptococcus lactic acid level High carbohydrate PH Alter Increase DecreaseLyses Release Absorbed Onset
Excessive weight (Draft horses are prone to laminitis of this cause) GI problems Endometritis or severe systemic infection A mare may develop this type of laminitis shortly after foaling as a result of infection arising from retention of part of fetal membranes or of a uterine infection. Prolonged transportation Excessive work on hard surface Bedding containing black walnut shavings Ingestion of cold water when horse is overheated
Stiffness Lameness Standing on heels Reluctance to move Heat in the hooves Increase of fetlock pulse Sensitivity to hoof testers
Sudden Stilted, shuffling gait Fore feet extended – hind feet under the center of the body Reluctant to move ACUTE LAMINITIS
More susceptible to: Sole bruises Abscesses separation of the wall at the toe Infection beneath the separated wall Hoof wall cracks Degeneration of the tip of the pedal bone Chronic lameness Slowed hoof wall growth
Difficult in diagnosis but the below may lead to diagnosis. 1.history(feed with high carbohydrate,prolonged transportation, GI probelms, reproductive problems). 2.clinical signs. 3.radiograph.
Fig.8 Cross section of horse hoof. The white arrow identifies inflammation of lamiae
Encouraging the horse to lie down to relieve pressure on the hoof Imposing dietary restrictions to prevent overeating Administering fluids if the horse is ill or dehydrated Administration of pain medications