La Surgery Test 2 Fetlock/carpus

Front 1

The fetlock is composed of?

Back 1

P1/MC or MTIII
sesamoid bones
suspensory ligament

Front 2

How many rad views are needed to assess the fetlock

Back 2

4

Front 3

What are 3 condition of the fetlock?

Back 3

OC
traumatic synovitis and capsulitis
chronic proliferative synovitis

Front 4

What are the 2 common sites for OC in the fetlock?

Back 4

bone fragments in mid saggital ridge
cysts on the condyle

Front 5

You are presented with an old racehorse that has a thickening of the dorsal fetlock and is lame. When rested the horse is no longer lame but when it starts to exercise the lameness returns and there is some jt effusion. Dx? Tx?

Back 5

Chronic proliferative synovitis
Tx: cortisone + rest

Front 6

T/F: fractures of P1 are a very common cause of lameness

Back 6

false: they are very common but don't usually cause lameness

Front 7

Are medial or lateral dorsoproximal P1 fractures more common

Back 7

medial

Front 8

T/F: it is better to remove a bone fragment using arthroscopy than leave it in

Back 8

true

Front 9

Sesamoiditis there is increased ____ and a loss of density of the sesamoid itself?

Back 9

osseous canals

Front 10

What is an expensive drug that might be beneficial in sesamoiditis?

Back 10

bisphosphanates

Front 11

Where are 3 places the sesamoid bone can fracture? Which of the 3 has the best px?

Back 11

apical (best px)
mid body
basilar

Front 12

Why do sesamoid fractures occur?

Back 12

overstress of suspensory apparatus

Front 13

Condylar fractures usually require ____ fixation

Back 13

internal fixation

Front 14

Which joint in the carpus has the least amount of movement?

Back 14

carpometacarpal

Front 15

Calf knees (back at the knee) predisposes horses to _____

Back 15

dorsal "chip" fractures

Front 16

Bucked knees (over at the knees) affects what tendons?

Back 16

flexor

Front 17

What is a tx for bucked knees?

Back 17

tetracycline
splints
sx

Front 18

T/F: bucked knees can be congenital in foals or acquired in adults that have suspensory and flexor tendon problems

Back 18

true

Front 19

What is the most chip fracture and what joint is involved?

Back 19

distal radial carpal bone
middle carpal jt

Front 20

What horses often experience chip fractures?

Back 20

racehorses

Front 21

Short spiriting horses without turns tend to get fractures in the _____ joint because of distal ____ fractures?

Back 21

radiocarpal jt
radius

Front 22

what is the tx for a chip fracture?

Back 22

removal arthroscopy!

Front 23

T/F: arthscopy is faster and less invasive and has a shorter recovery than arthrotomy

Back 23

true: rarely do arthrotomy anymore

Front 24

Define slab fracture.

Back 24

fracture that involves 2 adjacent articular surfaces

Front 25

Where are slab fractures most common?

Back 25

3rd carpal bone
radial carpal bone

Front 26

What is the tx for slab fractures? what is the consequence of untreated slab fractures/

Back 26

require internal fixation
will result in crippling OA

Front 27

What is a very common proliferative, lytic problem in the carpus that results in inflammation with no bone involvement?

Back 27

carpitis-- degenerative joint dz

Front 28

What is the tx for carpitis?

Back 28

rest + HA or adequate (IM) or steroids

Front 29

What is a non painful fluid filled bursa over the carpus called?

Back 29

carpal hygroma

Front 30

How do you dx hygromas? tx?

Back 30

dx: contract study (synoviogram) to see communication with joints
Tx: drainage or sx removal

Front 31

When is sx necessary for hygromas

Back 31

if it communicates with the joint

Front 32

What might be the cause of a swelling just proximal to the carpus secondary to trauma?

Back 32

synovitis of the Extensor carpi radials sheath

Front 33

How do you dx synovitis of the ECR sheath? tx?

Back 33

Dx: US
Tx: drain + steroids