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Dislocation of the patella

Professional Name Patellar luxation

Summary

Patellar luxation is a condition where the patella moves out of its original position. In most cases the patella jumps back in position by straightening the knee. If this fails, one should not force the knee, but seek medical help promptly. Treatments often include an immobilizer and physical therapy. Only in severe cases, a surgery will be needed.

Description

The patella is the triangle-shaped bone located in front of the knee joint. It is hold in position by ligaments. When the patella moves out of its original position, the knee cannot move as normal. This condition is called patellar luxation.

Occurrence + Symptoms

Patellar luxation is a condition where the patella is out of its original position on top of the knee. It commonly slides outwards. There are many factors that can cause the condition. For example, a sudden change of movement, walking, running, doing sports and certain actions can put extra stress on the patella and dislocate it. Patellar luxation can also result from an accident, a direct trauma or impact on the knee. In most cases the patella will jump back in position right after it was dislocated. Therefore affected persons may only feel a sudden pain or even just an unpleasant feeling. Repetitive patellar dislocation is more common in young women. When the patella stays dislocated, people may have symptoms such as deformity of the knee, a bent knee, inability to move the knee, pain, swelling and tenderness of the affected knee.

Consequences + Treatment

When a patellar luxation occurs, the affected person can try to straighten out his knee if possible. If it is stuck or too painful to move, then one should stabilize the knee and seek prompt medical help In order to relocate the patella under anesthesia. After a patellar luxation, it is recommended to wear an immobilizer for several weeks to prevent moving the affected knee. Physical therapy can help to regain the muscle strength and rehabilitate the knee. For severe cases, surgery is necessary for reposition. Surgery also can help to avoid regular luxations of the patella.

Possible symptoms of the disease:

joint swelling, knee pain, pain in the knees
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