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Patellar Luxation: We also suggest you contact the Orthopedic Foundation for Animals.
The information below is reprinted with the permission of Dr. Keller from OFFA.
Please contact them with further questions or visit their website at Official Luxar Information.
What is Patellar Luxation?
The patella, or kneecap, is part of the stifle joint (knee). In patellar luxation, the kneecap luxates, or pops out of place, either in a medial or lateral position.
Bilateral involvement is most common, but unilateral is not uncommon. Animals can be affected by the time they are 8 weeks of age. The most notable finding is a knock-knee (genu valgum) stance. The patella is usually reducible, and laxity of the medial collateral ligament may be evident. The medial retinacular tissues of the stifle joint are often thickened, and the foot can be seen to twist laterally as weight is placed on the limb.
Patellar Luxation Categories
The Patellar Luxation Database is for dogs 12 months and over. Examinations performed on dogs less than 12 months will be treated as Consultations and no OFA breed numbers will be assigned.
A method of classifying the degree of luxation and bony deformity is useful for diagnosis, and can be applied to either medial or lateral luxations by reversing the medial-lateral directional references. The position of the patella can easily be palpated starting at the tibial tubercle and working proximal along the patellar ligament to the patella.
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