Carpel Joint Flashcards
Five standard radiographic projections of the carpus
Lateral, flexed lateral, DP, DLPMO, DMPLO
Three additional projections of the carpus
Dorsoproximal – dorsodistal (skyline) projections
Distal radius , proximal row carpal bones, distal Row carpal bones
Synovial structures of the carpus, three joint spaces, which joint spaces communicate
Carpal sheath (distal radius – mid metacarpus) – DDFT, SDFT, AL – DDFT
Antebrachiocarpal, middle carpal, carpometacarpal, second two communicate
Two common TB racehorse injuries seen on skyline views
Injuries of the distal radius, third carpal bone – radial facet
DJD of the carpus
early (3) versus late (4) changes
Early – increased intracapsular soft tissue (synovial effusion and/or synovial proliferation), osteophyte formation, enthesophyte formation
Late – narrowing of the joint space, subchondral lucency, Subchondral bone sclerosis (technically trabecular bone adjacent to subchondral bone plate), ankylosis
How to determine if soft tissue swelling in carpal DJD is intracapsular
Assessment of dorsal fat pads of the antebrachiocarpal joint
Sclerosis of the third carpal bone
common signalment
Predisposes to…
Most common location…
Racehorses , fracture, radial facet
Three types of carpal bone fractures with definitions
Chip - involve one articular margin of the bone, frequently occurs in racehorses
Corner – similar to chip fracture however larger
Slab – extends through a bone involving the proximal and distal articular surfaces
Osseous cyst like lesions of the carpus
Occur where
Often found
Likely the result of
Can occur in all carpal bones
Frequently an incidental finding
Osteochondrosis
Osteochondroma
Occurs at
Develops from … and increases in size until…
Bilateral or unilateral?
Can be a component of what syndrome
Caudodistal aspect of radius at level of radial physis
Physeal cartilage/Physeal closure
Bilateral
Carpal Kanell syndrome
