Patellar Subluxation Diagnosis & Treatment

Patellar subluxation is the medical term for temporary displacement of the kneecap. The kneecap is usually dislocated by an injury that causes the leg to straighten too far. People with malformations of the leg, such as knock knees or an underdeveloped femur, are more prone to patellar subluxation.

Symptoms

Symptoms of kneecap dislocation include pain and swelling around the knee, along with possibly feeling the kneecap move around abnormally.

Diagnosis

Your doctor will perform a physical examination and will likely order imaging tests, such as an X-ray.

First Injury

For first-time or mild dislocations, most doctors will suggest keeping the knee elevated, applying ice frequently and using NSAIDs (non-steroidal anti-inflammatory drugs) like ibuprofen or aspirin for pain.

Recurrent Episodes

People who have patellar subluxation once are more likely to have future dislocations. If you have recurrent episodes of dislocation, physical therapy, an orthopedic brace and a change of sports or leisure activities are strategies doctors suggest. Surgery might also be warranted for repeat subluxation.

Time Frame

The sooner you seek treatment, the faster you can return to your daily activities, so it is important not to ignore symptoms of patellar subluxation. You'll usually need around 10 days to recover from a mild dislocation, but you may require months of rehabilitation for more serious injuries.

References

• University of Michigan Health System
• Wheeless' Textbook of Orthopaedics
• University Sports Medicine