Dislocation of the Patella

The patella is designed to run vertically up and down the patellofemoral groove. If the patella is moved to the outside of the groove it may become dislocated. This is ofetn the result of an acute blow / twisting action of the knee. In most cases the patella will relocate the patellofemoral groove on straightening of the knee, however this is known to be extremely painful.

What factors can lead to Patella Dislocation?

• Weak VMO - The VMO ( vastus medialis obliquus) is used to keep the patella on track in the patellofemoral groove during knee movements by pulling it towards the middle of the knee joint- an action known as 'tracking'. Poor orientation of the muscle fibres or weakness in the muscle will leave the patella far more susceptible to dislocation.
• Pronation of the feet.
• Q-angle - Some people have a larger than normal femoral angle (known as the Q-angle) and may have a 'knock-kneed' appearance (genu valgum). When the person straightens their leg, the patella will be forced to the outside of the knee. Thus any extra force applied to the inside of the knee may result in patellar dislocation.

Symptoms of Patella Dislocation:

• The knee may be swollen
• The patella will be painful
• Reduced mobility in the knee
• Obvious displacement of the knee cap

Useful Products:

• Cold Therapy Wraps - apply cold therapy treatment to the site of injury to help relieve pain and swelling.
• Knee Braces - a patella knee support can aid with patella tracking and reduce the risk of further injury.

Please see the Virtual Sports Injury Clinic for more information on how to treat Patella Dislocation