Bone Spavin Flashcards
where will you see osteophytes commonly in bone spavin cases
dorsolateral MTIII and distolateral + distomedial central tarsal bone
Grade 1: small osteophyte on distoLATERAL central tarsal bone
G2: small osteophyte on proximal dorsoLATERAL MTIII
G3: medium osteophyte on distoMEDIAL central tarsal bone
G4: large osteophyte on proximal dorsoLATERAL MTIII
conservative management for bone spavin
- injections (steroids, HA, IRAP, PRP)
- phenylbutazone
- exercise adaptation
- corrective shoeing
early sign of bone spavin
small osteophyte on distoLATERAL central tarsal bone
what is bone spavin?
DJD of distal intertarsal joint and tarsometatarsal joint on MEDIAL aspect
most common cause of hindlimb lameness
usually NO effusion or joint distension BUT may see hard medial enlargement due to osteophyte formation in severe cases
which treatment for bone spavin allows for immediate return to work?
chemical ankylosis using 70% ethanol
Bog spavin
DJD of tarsocrural joint
marked by effusion and joint distension
prognosis for cunean tenectomy for treating bone spavin
85%
no longer really used though
causes of bone spavin
- chronic repetitive work
- compression, torsion, or sheer strains
surgical treatment options for bone spavin
- cunean tenectomy: old school method no longer really used: prognosis 83%
- ankylosis: mechanical vs. chemical
technique for drill ankylosis for treating bone spavin
- approach medial aspect distal to cunean tendon
- make 3 tracts diverging at 30 degrees in transverse plane
diagnosing bone spavin
- proximal hindlimb flexion test/SPAVIN test for 90 sec
- nuclear scintigraphy: sensitive but NOT specific
- MRI: sensitive AND specific
- CT
what joints does bone spavin affect?
DJD of distal intertarsal joint and tarsometatarsal joint
predisposing factors to bone spavin
-poor conformation (common in western performance horses because they stop sharply and cut)
sickle hock, camped under, cow hocked
prognosis for drill ankylosis for bone spavin
60-85% in about 7 months
prognosis for conservative treatment for bone spavin
30-70%
