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36 Cards in this Set
- Front
- Back
What usually causes lambness?
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Limb pain
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What other differentials might there be if the most common cause of limb pain is not the cause?
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– neurological or mechanical.
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describe how a head nod can be used to diagnose severe hind limb lameness and what this might be misdiagnosed as
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downward nod when the lame foot is placed on the ground
In more severe cases of hind lameness a horse will shift its weight forward when the lame limb hits the ground. As well as a dropping of the hip on the affected limb this also causes the head and neck to shift forward and nod down at the same time. Since the opposite forelimb bears weight at the same time as the lame hind limb during trot, this head nod thus mimics lameness in the forelimb. |
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describe how foot placement differs in navicular syndrome and laminitis
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navicular syndrome- toe first
laminitis- heel first |
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what else might cause a change in limb or foot flight and foot placement other than lambness
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conformation
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what is running the horse in circles useful for diagnosing, explain why and what other indicators might you use to help with this
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to differentiate between distal limb or proximal limb.
for distal limb.... worse when weight bearing, there is more weight on the inside leg so the lameness will be worse when the lame leg is on the inside. Finally the lameness will be worse on hard ground. all this is opposite for the proximal limb (I rem. as distal limb is closer to the ground) |
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how is a head nod used to diagnose forelimb lameness and what actually is happening
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As the sound leg bears weight the head will nod down. As the lame leg bears weight the head will go up. ' down on the sound'
the cause of this is a reduced downward movement and increased upward moment of the head when the lame leg is set down |
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how is hip movement used to diagnose hind limb lameness
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To reduce the load on the lame limb the whole pelvis is lifted upwards as the limb strikes the ground and then moves downward when the sound limb strikes the ground.
It is often much easier to see the hip of the affected limb dropping as the sound limb hits the ground. |
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what are the 6 grades for lameness and what is the description for the 1st and last
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0-5
0= horse is not lame 5=non weight bearing lameness, unwilling to move |
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describe all grades of lameness
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Grade 0: horse is not lame
Grade 1: difficult to detect; not consistently present even when lunged Grade 2: difficult to detect when moving in straight lines but apparent when lunged or on hard surfaces Grade 3: lameness obvious at trot in straight lines Grade 4: obvious lameness; lame at walk Grade 5: non-weight bearing lameness; unwilling to move |
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what are the aims of a flexion test.
what are the problems with this test |
1. to cause lambness!! for more than 3 strides to identify if it is the lame leg.
2. localisation of the legion ( hard as it is hard to flex each joint by itself) there is a paradoxical response |
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what is the order of action in order to diagnose lameness using the following...
history Physical examination Lameness examination Diagnostic local anaesthesia Diagnostic imaging |
already in correct order
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in terms of cause of lameness what might you consider more common in warm bloods, foals and yearlings, older horses and race horses
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warm bloods- OC ( osteocondrosis)
foals and yearlings- spetic polyarthritis and osteomyelitis in foals and developmental orthopaedic disease in foals and yearlings older - osteoarthritis race horses- tendon injuries and fractures |
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although nature of onset and progression of lameness as described by the owner can be misleading, how might you use this information
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Sudden onset severe lameness – acute traumatic injuries, which often improve with rest e.g. fractures, tendon injuries, severe ligament injuries
Rapid onset severe lameness, frequently with wound – septic arthritis Gradual onset, slowly progressive, low grade lameness, might vary in severity (e.g. be intermittent) – degenerative conditions, e.g. OA, foot problems such as navicular disease |
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what should the slope angle of the fore and hind feet dorsal wall be. what else should be looked at.
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fore feet-50-54
hind feet 53-57 heels parallel to dorsal wall heels at least 1/3 height ( less in hind feet) |
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what is the normal range of fetlock flexion
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100-120
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when should you not use diagnostic local anaesthetic
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if the horse is acutely and severely lame and removing the pain will make the injury worse
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what are the main diagnostic imaging techniques used
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radiography and ultrasound
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what are some of the possible causes of acute severe lameness and what grade would this be
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Fractures
Subsolar abscess Laminitis Cellulitis Infected joint/tendon sheath/bursa Severe tendon/ligament strain Traumatic arthritis Lymphangitis Rhabdomyolysis Grade (3)4-5/5. i.e. obvious at walk or at rest |
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should nerve blocks be used to investigate fractures
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no
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in racehorses list the following in order of most common to fracture - MC3-P1-proximal sesamoid bone.
In which part of the pelvis are fracture more common in race horses- the wing or shaft of the ilium |
correct order in Q
ilial wing > shaft |
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what are fractures usually a result of in race horses and how does this usually present on X ray
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a build up of microscopic damage due to repeated overloading eg exercise as speed.
on x ray may be non displaced and incomplete and may just be seen from 1 radiograph. |
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what is the 1st step for fracture stabilization of limbs
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the limbs are divided into sections which differ in fore and hind limb. The section where the fracture is will be where the splint/ bandage will be placed so it determines the length and position of the bandage/ splint
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is a level 1 fracture the distal limb or proximal limb
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distal
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in a stable level 1 fracture where should you not put any bandage past and where should the splint make contact with and where should the splints be
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the hock ( HL) or Knee ( FL)
the splint should make contact with the foot and proximal MC3. there should be a lateral and a dorsal splint |
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does P3 require stabilization if fractured
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no
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in a stable level 1 fracture which bones might the fracture be in
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p1,p2 or distal metacarpus/ metatarsus
( note P3 does not need to be stabilized ) |
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what level is a level 2 fracture at. and where should the splints be
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mid metacarpus to distal radius in the FL. splints should be from elbow to ground caudally and laterally
mid and proximal metatarsus in the hindlimb. same. includes hock and tuber calcis |
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where might the splint be placed in a unstable level 1 fracture with limb shortening
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FL- dorsal
HL- plantar with heel wedge |
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where are level 3 fractures and where should the splints go
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mid and proximal radius -FL
hock and tibia- HL FL- same as level 2 -mid metacarpus to distal radius in the FL. splints should be from elbow to ground caudally and laterally, except the lateral splint is extended up the side of the chest. HL- sames as level 2 -mid and proximal metatarsus in the hindlimb. same. includes hock and tuber calcis, except bandage as far proximally as possible and extend lateral splint to lateral thigh |
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stabilisation of a fractured limb is not always necessary, give examples of when this might be the case.
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Limb stability preserved, e.g. splint bone fractures, carpal chip fractures & slab fractures – simple padded bandage generally sufficient
Level 4 # (humerus, scapula, femur, pelvis) – cannot be done effectively Pedal bone fractures – hoof capsule stabilises fracture |
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what is the ideal fracture to treat?
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Distal limb
No wound, minimal soft tissue trauma Simple, incomplete, i.e. stable Non-articular Just one injury |
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when is the prognosis poor for a fracture and why
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proximal limb - complete fracture of the tibia and femur because prognosis is hopeless as there is usually another injury and cant be stabilized ?? maybe??
open fracture severe soft tissue damage unstable ( comminuted - broken in many bits-, complete, displaced) more than 1 fracture site or an injury of another organ system |
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out of the following acute lameness injuries which ones are emergencies...
fracture, foot abscess, septic arthritis/ tenosynovitis |
all except foot abscess
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What conditions commonly occur in the equine foot?
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Osteoarthritis of the distal interphalangeal joint (DIPJ)
Laminitis Navicular syndrome Pedal osteitis Palmar heel pain |
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what is often the most important treatment for problems with feet
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''FARRIERY IS THE MOST IMPORTANT PART OF ANY FOOT ASSOCIATED LAMENESS!''
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