Peer-reviewed veterinary case report
Coxofemoral luxation complicated by upward fixation of the patella in the pony.
- Journal:
- Equine veterinary journal
- Year:
- 1977
- Authors:
- Bennett, D et al.
Plain-English summary
This study looked at two ponies that had a hip dislocation (coxofemoral luxation) along with a problem where the kneecap got stuck in an upward position (upward fixation of the patella). The ponies showed signs like their knee and foot turning outward and their hock (the joint similar to an ankle) turning inward, with both joints unable to bend. One pony was treated with a surgical procedure to release the kneecap, which greatly improved its ability to move around. The research suggests that the way the hip dislocation affects the leg's position can lead to this kneecap issue. Overall, the treatment worked well for the pony that received surgery.
Abstract
Two cases of coxofemoral luxation complicated by upward fixation of the patella are described in the pony. Clinical signs included outward rotation of the stifle and foot and inward rotation of the hock with the stifle and hock joints fixed in extension. One case was treated by performing a medial patellar desmotomy with a resultant significant improvement in locomotion. Other cases of hip luxation reported in the literature, some complicated by upward patellar fixation, are reviewed. Hip luxation is principally seen in ponies and it is suggested that upward fixation of the patella occurring in some of these cases is a result of rotation of the limb produced by dislocation of the hip, which alters the normal anatomy and mechanics of the femoro-patellar joint and/or interferes with the normal leverage of the rectus femoris muscle.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/923551/