An elbow luxation, like any dislocation of a joint, is a very painful injury that will cause a cat to be unable to use the injured limb. These dislocations often occur as the result of a traumatic experience such as being hit by a car, being attacked by a larger animal, or falling from an extreme height. An animal that is limping, holding its leg up when it walks, and/or has a swollen or misshapen elbow must be taken to the veterinarian immediately to prevent further injury and extreme pain.

Three bones—the humerus, the radius, and the ulna—meet to form the elbow of a cat. At the elbow, these three bones are connected by ligaments, which are called collateral ligaments. When a traumatic injury occurs to the elbow of a cat, tearing the collateral ligaments, these three bones cannot be held together and will become dislocated from one another. Medically speaking, this dislocation is referred to as an elbow luxation.

Cats are usually very nimble and athletic animals. Therefore, it is often quite noticeable when a cat has a significant leg injury. If you observe any of the following symptoms, it is extremely important that you have the cat examined by a veterinarian immediately, as your cat is likely in a great deal of pain and may have either elbow luxation or a broken bone. The following symptoms are common signs of elbow luxation in cats:

Although there are some very rare conditions that can cause some cats to have a disposition toward joint dislocation, the vast majority of elbow dislocations in cats occur because of one of the following three traumatic experiences:

The difficulty of diagnosing a dislocated elbow in a cat is often determined by the behavior of the cat and the extent of other injuries. If the animal is displaying the symptoms listed above, your veterinarian will likely employ the following techniques to determine if the cat is suffering from a dislocated elbow, which is a very painful injury:

The vet will likely use her or his hands to examine the joint. This type of examination is often called palpation. Palpation can enable the vet to feel if the joint is out of position, if the joint can be moved as normal, and if there is pain in the joint. 

X-rays are, perhaps, the most valuable diagnostic tool as they will enable the vet to see for certain if an elbow luxation has occurred if the pain and limping is being caused by something else, such as a bone fracture or severe arthritis.

If the veterinarian determines that your cat has a dislocated elbow, he or she will likely begin treatment immediately in one of the following ways:

If the vet was able to repair the dislocated elbow without surgery, the cat will likely be sent home with the leg in a splint, which will cause the leg to stay straight while it heals. It will likely take around two weeks for the joint to heal. During that time you will need to make sure the splint stays in position and that it is not causing discomfort or pain by rubbing against the cat’s skin. If the injury required surgery, you will need to care for the wound and administer any medicine, such as antibiotics, that have been prescribed by the veterinarian. Whether the injury required surgery or not, in order to prevent a repeat injury of the joint the cat must be kept inside during this healing period and away from other pets and small children. Your vet will likely expect to examine the cat one or more times in the weeks following the original treatment. The long-term prognosis for a cat with elbow luxation is usually quite good, although the joint may develop arthritis over time.