Summary
Objective: To determine the prevalence of patellar luxation in dogs in Italy and its relation
to signalment, the frequency and the type of postoperative complications and the outcome
of treatment, and to compare the findings with those of other studies.
Materials and methods: The medical records from four referral clinics were searched for dogs with orthopaedic
disorders referred from 2009 to 2014. From these data, the records of dogs with patellar
luxation were identified, and the signalment, age and body weight, grade, side and
direction of patellar luxation, treatment, postoperative complications, and outcome
were retrieved. Univariate and multivariate statistical analyses were used to evaluate
the data.
Results: Of 8,694 canine orthopaedic cases, fractures not included, patellar luxation was
diagnosed in 559 dogs (801 stifles). Mixed breed dogs were most commonly affected
(18%), 85% of the luxations were medial, and 52% of the dogs were female. Of the 559
dogs examined, 400 (574 stifles) met the inclusion criteria for treatment evaluation.
Minor complications occurred in five percent of the dogs, and major complications
in 16%, including recurrence of patellar luxation in seven percent of the dogs. The
outcome was good in 88% of stifles, fair in two percent, and poor in 10%.
Clinical significance: Although patellar luxation was more common in small breed dogs, it also was diagnosed
in a significant number of large breed dogs, which included medial patellar luxation
in 73% and lateral patellar luxation in 27% of stifles. Body weight and grade of luxation
were the only variables statistically correlated with surgical complications.
ORCID iD AV: http://orcid.org/0000-0003-2837-7822
Keywords
Dogs - patellar luxation - prevalence