Dislocated Knee

Dislocated Knee

The knee is a complex joint located between one’s upper and lower leg. When the three bones of the knee are out of place and are not aligned in the way they should be, it is known as a dislocated knee. Some people are born with a knee dislocation, i.e. congenital dislocation of the knee. However, most of the time, knee dislocations happen when due to a traumatic event, the bones in the knee joint are thrust out of place with great force.

If your knee is dislocated, then your thigh and shin bones might be completely or partially out of place. It is to be noted that a dislocated knee is different from a dislocated kneecap.

Although dislocated knees are rare, it is serious. Other parts of the knee might also have been damaged at the same time, and you need to see a doctor right away.


When the knee is dislocated, you might hear a popping sound. Some of the symptoms are:

  • Lots of pain- Your knee can be in so much pain that you won’t even be able to move or straighten it.
  • Your knee getting swollen and severely bruised.
  • Your knee feeling unstable.
  • Parts of the knee looking like they have been knocked out of place
  • Being unable to perform activities that you normally do


Sometimes knee dislocation might be something that you are born with. This is termed congenital dislocation. However, knee dislocation might also happen due to the result of serious trauma such as:

Car accidents- If you ever bang your knee against a tough surface such as your dashboard, the force of the blow might be strong enough to dislocate your knee.

Hard falls- It might happen to sportsmen, especially skiers or runners if they lose control and fall on a bent or overextended knee. If you fall after stepping into a hole in the ground by mistake, it can also cause a dislocated knee.

Sports injuries- Although this is less common than car accidents, it is possible to dislocate your knee if you collide against another player, with great force.


If you ever suffer from a potential knee dislocation, your doctor’s first priority is stabilizing your injured limb. Reduction or repositioning of your injured point is important in order to reduce any pressure on the skin, blood vessels, and nerves in your affected area. Sometimes reduction can occur spontaneously before you can see a healthcare provider.

Your doctor is able to assess the extent of your injury, once you are stabilized. He/she might perform multiple tests to determine the amount of ligament damage that has occurred. Typically, these tests involve determining the stability as well as the range of movement of specific parts of the knee. The exam might also include:

  • Checking the blood pressure in your leg
  • Checking the pulse in several places on your leg and knee
  • Checking nerve conduction
  • Checking your sense of touch or sensation
  • Checking your skin color and temperature


Your doctor is likely going to use imaging tests such as X-ray and MRI, as these can help him/her see and diagnose and damage that has occurred to your ligaments, bones, or tendons of your knee.

Another technique known as an arteriogram might also be used for assessing blood vessel damage.

There is also a rare condition known as CKD, or congenital knee dislocation, in which the knee is dislocated from birth. The exact cause of this is unknown. Doctors are able to diagnose CKD after birth, and it generally involves X-ray imaging of the affected joint. Generally, treatment options are serial casting or surgery.



While treating a dislocated knee, the first part is to make sure that the kneecap is in its proper position. The process of moving the kneecap back into place is known as reduction.

During this process, a healthcare provider should provide you with medication or put you under sedation so that you don’t feel any pain. They will then move your leg in a way that is going to cause the kneecap to return to its proper place.


You might also require surgery in order to repair damaged ligaments, blood vessels, or any nerves. You might also need immediate surgery if your blood vessels are damaged.

If you undergo surgery, you might need to wear different knee braces while healing. Some can help in bending your knee, to ease any stiffness.

Physical therapy

After some time, your doctor is going to likely send you to a physical therapist, for rehabilitation. You will need to do exercises for strengthening your leg muscles around your knee and work for bringing a full range of motion back to your joint.

How long your recovery takes, depends on how serious your injury is, and if you had suffered any damage to your blood vessels and nerves. If you receive your treatment quickly, it is likely that you are going to heal well and soon. In most cases, complete recovery from a knee dislocation can take up to a year.

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