Dislocated Knee
What is a Dislocated Knee?
A dislocated knee occurs when the thigh and shin bones are not aligned properly, either partially or completely. A dislocated knee is different from a dislocated knee cap, which is when the knee cap slips out of place. A knee dislocation is very serious and very painful. If you suspect your knee is dislocated, you should seek emergency medical attention immediately.
What Causes a Dislocated Knee?
A dislocated knee may be caused by:
- Sports injuries
- Auto accidents
- Falling
Dislocated Knee Symptoms
Symptoms of a dislocated knee may be:
- Knee pain that is so severe you can not move your knee
- Knee swelling or bruising
- The knee appearing out of place
- A popping sound at the time of dislocation
Dislocated Knee Diagnosis
You should seek immediate medical attention at the nearest emergency room if you suspect you have a dislocated knee. A doctor will examine your knee and ask you how you injured it. They will see if your knee has any swelling or is misshapen, as well as feel the skin around the knee and observe the appearance of your leg and foot to see if they can see any damage to nerves or blood flow due to the dislocation. There are a few tests your doctor may do to further assess if your knee is dislocated including:
- X-ray – to check for broken bones
- MRI – to check for soft tissue damage
- Ankle-brachial index test – to look for changes in blood flow
- Electromyography – the doctor may insert a needle into your muscle to record electrical activity
- Arteriogram – to check your blood flow
Dislocated Knee Treatment
If you are diagnosed with a dislocated knee, your doctor will either move the knee back in to place or recommend surgery to repair the dislocated knee.