Patellar luxation is hereditary and especially common in small and toy breeds of dogs. Affected animals may also have other leg or joint problems. The patella (or kneecap) lies in a "track" on the front of the leg, where it functions in joint movement, sliding up and down easily as the knee bends and extends. In some dogs and less commonly in cats, the patella does not stay in its track, occasionally slipping (or luxating), usually to the inside of the leg. When this happens, it is called patellar luxation.
Signs of patellar luxation in pets vary depending on how severe the problem is. Most pets tend to skip or hop when walking or especially when running, but some dogs and cats may hold the leg up completely. Damage caused by the kneecap slipping in and out of its track can eventually lead to arthritis in the knee.
Your veterinarian can generally diagnosis this problem by palpating the knee joint, but x-rays are often recommended to look for arthritis or other problems.
Many pets with patellar luxation do fine without any treatment or with only occasional pain relievers or anti-inflammatory medication. Surgery may be needed in more severe cases or in overweight pets that typically have much more of a problem when the patella slips. Getting your pet's weight under control is important in management of this condition in overweight pets.
If surgery is required, it is often extremely successful and with proper recovery, will correct the problem. Our veterinarians are very experienced with this type of surgery. Visit our website to read about our pet of the month "Pearl" who just had this surgery performed a few weeks ago!
Some material taken from John A. Bukowski, DVM, MPH, PhDand Susan E. Aiello, DVM, ELS
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