CARPUS: 55 Flashcards
DORSAL CARPAL LIGAMENTS
- short radial collateral
- short ulnar collateral
- dorsal radiocarpal
PALMAR CARPAL LIGAMENTS
- medial collateral
- lateral collateral
- accessoro-metacarpal IV
- accessoro-metacarpal V
- palmar radiocarpal
- palmar ulnocarpal
CARPAL LIGAMENTS WITH THE HIGHEST ELASTIC MODULES
accessorometacarpal
bones of the carpus
radial carpal, ulnar carpal
1, 2, 3, 4,
accessory carpal
what is the only bones to wich the palmar fibrocartilage is not attached?
accessory carpal
carpal anatomy difference cat vs dog
CAT:
-absence straigh part of medial collateral ligament (antebrachial luxt with only partial tear of ligament)
DOG:
-lacks dorsal elastic ligament attacched to head of the middle phalanx+ head medial phalanx is different (not able to retract claw)
median antebrachial angle at walk
18°
radial carpal bone fracture predisposition
male, breed (boxer, english spaniels, setter, pointer)
most common carpal bone fracture configuration
1) dorsal slab fracture
2) midbody saggital
3) comminuted T shaped
Criteria for intervention in metacarpal/metatarsal fracture
1) more than 2
2) 3 and 4 metacarpal are both involved
3) articular fractures
4) segment displaced >50%
5) athletic/large breed dogs
6) fracture involves base metacarpal/metatarsal 2 or 5
metacrarpal fracture classification
Dee and Dee
1) endosteal and cortical bone thickening
2) minimally displaced hairline fractures
3) complete with displacement
where is the most common site of carpal hyperextension?
1) carpometacarpal 47%
2) antebrachiocarpal 31%
3) middle carpal 22%
median and acceptable angles for pancarpal arthrodesis
10-12 optimal
beetween 10 to 47
sesamoid most commonly involved in fracture
2 and 7. statistically fewer vascular foramina.
carpal bone tipically associated with fracture
intermedioradial carpal bone
accessory bone
intermedioradial bone fracture pattern
-dorsal slab
-midbody saggital (dorso prox lat to palmaro dist med)
-comminuted T shaped
-(male predilection and breed predilection= boxer springer s, setter, pointer)
racing Greyhounds
on what side tipically accessory carpal bone fracture occurs in Greyhounds?
right carpus (external arm in counterclockwise tracks)
most common accessory bone fracture
type 1
accessory bone fracture classification
1) avulsion distal articular surface with ulnar carpal bone
2) proximal articular surface with ligaments that connects to radio and ulna
3) avulsion distal surface at palmar end
4) avulsion tendon flexor carpi ulnaris (caudoproximal surface)
5) comminuted
breed predisposition to collateral ligaments sprain
dobernamm pinscher. in a case series of 10, 8 pinschers. in another case series 2 Border collies
most common presentation for carpal hyperextension in cats
subluxated (contrary to dogs where tipically there is no luxation-sublux), after a high-rise fall
Arthrodesis carpus: plate recommandation for metacarpal
longer than 50% of the whole metacarpus, and crews <40% bone diameter
carpal laxity syndrome, signalment
5 to 27 weeks dogs, 2:1 male on female. recovery usually in 1-4 weeks.
