Patellar Subluxation

What Is a Pattellar Subluxation? A subluxing patella (kneecap) is a temporary, partial dislocation of the kneecap from its normal position in the groove in the end of the thigh bone (femur). This groove is located between two bumps at the end of the thigh bone called femoral condyles.

How Does It Occur? This temporary dislocation of the kneecap usually happens during forced leg straightening, with the kneecap moving out of the groove to the outer side of the knee. The cause is usually an abnormality in the way your legs are built. You may have an underdevelopment of the inner thigh muscle or an over-development of the outer thigh muscle. Your kneecap may be higher in the leg than usual. You may be knock-kneed or have underdevelopment of the outer (lateral)femoral condyle.

What Are The Symptoms Of Patella Subluxation? You may feel the kneecap moving out of position. You may have swelling and pain behind the kneecap. You may have pain when you bend or straighten your leg.

How Is Patellar Subluxation Diagnosed? Your doctor will ask about your symptoms and examine your knee. He or she may be able to feel the kneecap slipping to the outside as you bend and straighten your leg. An x-ray may show under-development of the lateral femoral condyle.

How Is Patellar Subluxation Treated? Treatment may include:

  • 1. Putting ice packs on your knee for 20 to 30 minutes every 3 to 4 hours for the first 2 or 3 days or until the pain goes away.
  • 2. Elevating your knee to help any swelling go away.
  • 3. Taking an anti-inflammatory medication.
  • 4. Wearing a brace prescribed by your doctor to keep your kneecap in place.
  • 5. Doing exercises to strengthen the inner side of the thigh muscle (Quadriceps.)

 

Some people need surgery to keep the kneecap from subluxing.

While you are recovering from your injury, you will need to change your sport or activity to one that will not make your condition worse. For example, you may need to bicycle instead of run.

When Can I Return To My Sport Or Activity? The goal of rehabilitation is to return to your sport or activity as soon as is safely possible. if you return too soon you may worsen your injury, which could lead to permanent damage. Everyone recovers from injury at a different rate.Return to your sport or activity will be determined by how soon your knee recovers not by how many days or weeks it has been since your injury occurred. in general , the longer your symptoms before you start treatment the longer it will take yo get better.

You may safely return to your sport or activity when, starting from the top and progressing to the end, each of the following is true.

  • 1. Your injured knee can be fully straightened and bent without pain.
  • 2. Your knee and legs have regained normal strength compared to the uninjured knee and leg.
  • 3. Your knee is not swollen.
  • 4. You are able to jog straight ahead without limping.
  • 5. You are able to do 45-degree cuts.
  • 6. You are able to do 90-degree cuts.
  • 7. You are able to do 20-yard figure-of-eight runs.
  • 8. You are able to do 10-yard figure-of-eight runs.
  • 9. You are able to jump on both legs without pain and jump on the injured leg without pain.

 

If you develop pain, swelling, or the feeling that your kneecap is moving out of place again, you need to contact your doctor.

How Can I Prevent A Patellar Subluxation? Patellar subluxation is best prevented by keeping your thigh muscles strong, especially the group of muscles on the inner side on the thigh muscles strong, especially the group of muscles on the inner side of the thigh.

Patellar Subluxation Rehabilitation Exercises: You made do all of these exercises right away. It is important to stretch the muscles in the back of your leg. It is also important to strengthen the muscles on the top of your thigh so you kneecap won't sublux again.

1. Hamstring stretch: Lie on your back with your buttocks close to a doorway and extend your legs straight out in front of you along the floor. raise the injured leg and rest it against the wall next to the door frame. Hold this position for 30 to 60 seconds, feeling a stretch in the back of your thigh. Repeat 3 times.

2. Standing calf stretch: Facing a wall, put your hands against the wall at about eye level. Keep the injured leg back, the uninjured leg forward, and the heel of your injured leg on the floor. Turn the foot on your injured leg slightly inward (as if you were pigeon-toed) as you slowly lean into the wall until you feel a stretch in the back of your calf. Hold for 30 seconds. Do this several times a day.

3. Quadriceps set: Sit on the floor with the injured leg straight. Press the back of your knee down toward the floor while tightening the muscles on top of your thigh. Concentrate on tightening the muscles on the inner side of your kneecap. Hold this position for 5 seconds. Repeat 20 times.

4. Straight leg raise: Sit on the floor with the injured leg straight and the other leg bent, foot flat on the floor. Pull the toes of your injured leg toward you as far as you can, while pressing the back of your knee down and tightening the muscles on the top of your thigh. Raise your leg 6 to 8 inches off the floor and hold for 5 seconds. Slowly lower it back to the floor. Repeat this 10 times. Do 3 sets of 10.

5. Prone hip extension: Lie on your stomach. Squeeze your buttocks together and raise the injured leg as far as you can comfortably, while keeping your back straight. Hold this leg in the air for 5 seconds and then lower it. Repeat 20 times.

6. Weight lifting - leg extension: Do these if you have access to a weight lifting bench with a leg extension attachment. Sit on the bench with the weight attachment in front of your lower legs. Extend your knees by straightening your legs. Be sure your legs straighten completely. The last 15 degrees of extension are the most important. Use enough weight to cause fatigue but not pain. Do three sets of 10.

All material provided is designed for information purposes only and should not be used to replace the care of a health care professional. Do not rely on any of the information for diagnosis or treatment. It is recommended that you visit a qualified health care professional for individual and personal attention.

What Is a Pattellar Subluxation? A subluxing patella (kneecap) is a temporary, partial dislocation of the kneecap from its normal position

Patellar Subluxation

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