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Equine Foot lameness 2
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Veterinary Medicine
Graduate
02/28/2016

Additional Veterinary Medicine Flashcards

 


 

Cards

Term
Hoof Abscess
Definition

 

  •    Common cause of lameness

  •  Typically acute lameness

  •  Typically increase of digital pulse

  •  Any insult to the sole can create an

    ideal medium for bacterial growth

  •  Chronic cases may present with

    cellulitis and systemic infection

  •  Variable clinical signs: infection can be misdiagnosed 

Term
Hoof abscess diagnosis
Definition

 

  •   Increase of digital pulse

  •  Hoof testers

  •  Warm poultice

  •  Radiographs ( gas shadow)

  •  Antibiotics and anti-inflammatory can be contraindicate 

Term
hoof abscess treatment
Definition

 

  •    Release infection & adequate drainage

  •  Drainage through the sole!!

  •  Debridement of necrotic tissue

  •  Poultice until the infection is

    controlled

  •  Warm bath with povidone and

    magnesium salt

  •  Antibiotics and anti-inflammatory can

    be contraindicate

  •  Tetanus prophylaxis 

Term
solar bruising of aseptic pododermatitis
Definition

 

Single episode of trauma or due to repeated excess weight bearing (poor foot balance)

Diagnosis: by inspection & hoof testers.

Deep solar bruising difficult to diagnose

Treatment: rest, NSAIDs, solar pads or glue on shoes 

Term
Corns
Definition

 

  •    Bruise of sole at specific location: medial angle (“seat of corn”) much more common than lateral

  •  Usually due to pressure from heel of shoe; either

    shod too short
    shoe left on too long
    dorsopalmar foot imbalance 

excessive heel loading leads to bruises/subsolar abscessess

corrective trimming and shoeing; extended heel support 

Term
treatment for corns
Definition

 

Remove offending shoe Remove damaged horn Bandage or poultice
Re-shoe:

wide-webbed shoe
3/4shoe
Siliconepad(Onlyofdefectisready)
Bar shoe in case of dorsopalmar imbalance and bilateral

corns 

Term
puncture wounds of the sole
Definition

 

Common emergency in equine practice
Important to rule out sepsis of synovial structures.

Commonly result in subsolar abscesses
Early treatment is essential 

Diagnosis: 

 

Radiographs
Synoviocentesis
Navicular bursa contrast study MRI 

Term
Treatment for puncture wounds
Definition

 

Subsolar abscess localised using hoof testers

Pare tract to release pus Explore tract:

Warm bath with povidone/magnesium salt

Poultice until the infection is controlled (e.g. “Animalintex®”)

Antibiotics required depending on the involvement of structures

Infected joints or bursae require flushing & debridement; prognosis depends on severity and duration of injury

Bursoscopy lavage, intrathecal medication

Antibiotics, anti-inflammatory and intravenous regional perfusions

Corrective farriery 

Term
seedy toe or white line disease
Definition

 

  •   White line is the sole-wall junction and a weak region due to the soft horn

  •  Combination of bacteria &fungi produce separation of the white line

  •  Occasionally produce lameness. 

Term
seedy toe diagnosis
Definition

 

  •    Typically an incidental finding at the time of trimming

  •  White line becomes filled with poor quality infected tissue

  •  Characteristic hallow sound when the hoof capsule is percussed

  •  Often secondary to laminitis

  •  Advanced cases: instability of

    pedal bone or infection into the sensitive lamenae 

Term
seedy toe treatment
Definition

 

  •   Pare regions of abnormal horn and debridement of all crack and fissures.

  •  Expose and removal of all diseased hoof wall

  •  Pack with iodine or metronidazol optional

  •  Severe resections: bar shoe is indicated for stabilizing the hoof

  •  When the disease is eliminated

    reconstruction of the hoof with

    acrylics material

  •  Treat laminitis if this is involved in aetiology 

Term
hoof wall cracks
Definition

 

  •   Anywhere from toe to heels

  •  Superficial or full thickness

  •  Vertical cracks from coronary

    distally (“sand cracks”) or from ground proximally (“”grass cracks”)

  •  Result of chronic foot imbalance, lack of trimming, trauma, nutrition or poor hoof quality

[image]
Term
clinical signs for hoof wall cracks
Definition

 

May be sound, or severely lame, depending on location & depth of crack

If in doubt as to significance, apply hoof testers 

Term
diagnosis and treatment for hoof wall cracks
Definition

 

  •    Assess hoof capsule and conformation

  •  Treat any underlying causes

  •  Debridement of any infected tissue

  •  Hoof balance

  •  Stabilize hoof wall adjacent to crack

  •  If possible, reduce weight bearing in affected region

  •  Consider supplements to improve hoof wall quality & growth rate 

Term
treatment for hoof wall cracks
Definition

 

  • Hoof balance

  • Stabilize crack:
    Bridge crack using metal or fibreglass plate Bar shoe, clips and silicone
    Cast
    Acrylic& wire
    Combination of all

     

    Debridement of the crack, antiseptic, stabilization with metal staples, silicone pad and corrective shoeing to realise the pressure over affecting area 

Term
Keratoma
Definition

 

  • Benign, hyperplastic keratin masses

  •  Arise from the epidermal keratin producing cells Originate at any point in the hoof wall and sole

    (spherical vs cylindrical)

  •  Space occupying tumours Often causes recurrent hoof

    abscess 

Term
keratoma diagnosis
Definition

 

Disruption of the hoof architecture allow bacteria infection and recurrent abscess

May causes pressure necrosis and resorbtion of pedal bone margin leading to characteristic radiographic lucency

Deformation of the white line 

Term
keratoma treatment
Definition

 

  •   Surgical removal standing or under general anaesthesia

  •  Combination of tools including hoof knifes, trephine, oscillating saw and motorized rotor

  •  Good prognosis after surgical removal 

Term
thrush
Definition

 

  •   An infection of the frog caused by wet environment

  •  Similar to ovine foot-rot
    Fusobacterium necrophorum

  •  Black sticky discharge; terrible smell

  •  Can result in under-run sole & limb oedema 

     

    Contracted heels may predispose to the

    condition

    Defined as a frog width less than 67% of the frog length 

Term
thrush treatment
Definition

 

Trim affected parts of frog

Move to dry environment

Antiseptic foot baths (povidone-iodine) 

Term
septic pedal osteitis
Definition

 

Penetrating injury to the sole involving P3

Chronic sub-solar abscess

Blunt trauma

Diagnosis:

Peel sole and localised necrotic track Radiographs
Placement of a probe to confirm

communication with distal phalanx 

Term
septic pedal osteitis treatment
Definition

 

Surgical debridement standing or under GA
Curettage of infected pedal bone
Packing the area with antibiotic impregnated swab

Regional perfusion with antibiotics
Systemic antibiotics and anti-inflammatory
Medical grade maggots

 Solar support

Hoof bandage

Good prognosis if small area is infected 

Term
canker
Definition

 

Chronic pododermitis of the germinal layers

Gram-negative bacterial infection of the stratum germinativum of the frog’s epidermis

Hypertrophic dermatitis of the frog and the bulbs of the heels 

Diagnosis: 

 

Mainly affects draft horses

Horn of heels, bars and frog degenerates into strands of soft tissue with cheesy white discharge

Lame; frequently stamp feet 

Term
canker treatment
Definition

 

Radical surgical debridement of the affected tissue

Topical treatment with metronidazole and bandages 

Term

collateral cartilage infection

"quittor" 

Definition

 

  • Result of a hoof wall crack, puncture wound, chronic abscess, heel laceration

  •  Severe degree of lameness until adequate drainage is established

  •  Difficult to treat due to the avascular nature of cartilage 

Term

collateral cartilage infection

"quittor" 

Diagnosis and treatment 

Definition

 

  •    Chronic sepsis with intermittent purulent discharge above the coronary band

  •  Fistulography

  •  Identification of concurrent

    infectious osteitis

  •  MRI

    Surgical excision of the infected cartilage and surrounding tissue

    Opening of a ventral drainage portal is essential to allow the resolution of infection 

Term
coronary band laceration
Definition

 

Emergency in equine practice

Important to rule out sepsis of synovial structures

[image]
Term
coronary band laceration treatment
Definition

 

  •    Debridement and primary or delayed primary closure

  •  Non absorbable sutures

  •  G.A or standing

  •  Immobilization with cast 

Term
Heel bulb laceration
Definition

 

  •   Emergency in equine practice

  •  Vital structures can be affect

  •  Important to rule out sepsis of synovial structures

  •  Required GA to assess structures 

Term
heel bulb laceration treatment
Definition

 

Assess DDFT, Collateral cartilages, Navicular bursa, impar ligament, DFTS

Involvement of above structures decrease prognosis

Arthroscopic lavage and debridement of the area

Immobilization with cast 

Term
hoof wall avulsion
Definition

 

Emergency in equine practice Important to rule out sepsis of

synovial structures.
Early treatment is essential

treatment:

Surgical debridement

Immobilization with cast

Hoof wall reconstruction 

Term
sheared heels
Definition

 

 Defined as a disparity between the medial and lateral heel lengths of .5 cm or more.

  • –  Associated with dynamic lateromedial imbalance

  • –  One heel (usually the medial one) strikes the

    ground before the other.

    •  Proximal displacement of this heel. The wall on this side becomes short and upright. The opposite wall expands and flares outwards.

    •  Continuous tearing and bruising of the sensitive laminae in the compressed heel, and breakdown of tissues that connect the heels result in lameness.

    •  Bar shoe floating the displaced heel. 3⁄4 shoe with bar 

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