| Autor: |
Johnson, Allen L., Broaddus, Kristyn D., Hauptman, Joe G., Marsh, Sarah, Monsere, Jaime, Sepulveda, Gustavo |
| Předmět: |
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| Zdroj: |
Veterinary Surgery; Jan2006, Vol. 35 Issue 1, p78-81, 4p, 1 Black and White Photograph, 1 Chart |
| Abstrakt: |
Objective To further define vertical patellar position, as measured by the ratio of patellar ligament length to patellar length (L:P), in large-breed dogs with clinically normal stifles and compare that to the L:P of large-breed dogs with medial patellar luxation (MPL). Study Design Retrospective study. Sample Population Large-breed dogs (n=50) with clinically normal stifle joints and 30 large-breed dogs with MPL. Methods Large-breed dogs with clinically normal stifle joints or MPL were identified and divided into groups (NORM and MPL, respectively). L:P values were determined for each dog by 4 observers from single lateral stifle radiographs. L:P was compared between NORM and MPL groups and 95% confidence intervals (CIs) were calculated. Results All 4 observers found a significantly higher L:P (more proximally positioned patella) for the MPL group compared with the NORM group. Overall mean (±SEM) L:P were: NORM, 1.71±0.020 and MPL, 1.87±0.025. The 95% CI was determined to be 1.45–1.97 for the NORM group and 1.57–2.17 for the MPL group. Conclusions Large-breed dogs with MPL had a significantly more proximal vertical patellar position compared with large-breed dogs with clinically normal stifles. Large-breed dogs with L:P values >1.97 are considered to have patella alta. Clinical Relevance Proximal displacement of the patella within the femoral trochlear groove may play a role in MPL in large-breed dogs. [ABSTRACT FROM AUTHOR] |
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