Ever wondered what happens when someone has a dislocated knee? It's not your everyday injury, but when it does happen, it can be a big deal. A dislocated knee is a severe injury that needs quick medical help and comprehensive treatment to optimise recovery and reduce the risk of long-term complications.
Read our article below to find out what a dislocated knee is, the symptoms, and what you can do to treat it.
What is a dislocated knee?
A dislocated knee occurs when the bones in the knee joint get pushed out of place, which disrupts how the joint normally works. While it's not very common, knee dislocation is a serious injury that can impact your knee's function.
Depending on the force and impact on the knee, knee dislocation can happen in different ways. One of the most common types of dislocated knee is a kneecap or patella dislocation.
Dislocated kneecap or patella
A dislocated kneecap is when your kneecap shifts from its normal position within the knee joint, often dislocating sideways (most common) or in other directions. This usually happens because of a strong hit, like a fall, bump, or wrong step. Although it might make walking difficult at first, it’s often easier to fix than a dislocated knee.
In some cases, a dislocated kneecap heals on its own, but it’s still recommended to go to a hospital for an X-ray to check for fractures.
Dislocated knee symptoms
When you dislocate your knee, it’s common to experience a range of symptoms that can be quite noticeable. Here are some common symptoms of a dislocated knee:
- Immediate pains
- Sudden swelling
- Visible deformity
- Inability to move leg
- Instability
- Bruising
- Numbness or tingling
- Warmth or heat
If you are experiencing any of these symptoms, it is recommended to seek medical help as soon as possible.
Dislocated knee causes
There are various factors that could cause a dislocated knee, depending on someone’s lifestyle and occupation. Some of the most common ones are listed below:
Sports injuries
Participating in sports activities, especially those involving sudden stops, changes in direction, or direct blows to the knee, can increase the risk of a dislocated knee. Due to the dynamic and often forceful movements required, sports like football, basketball, cycling, and skiing are more likely to cause knee injuries.
Car accidents
Car accidents can result in significant trauma to the knee joint, leading to a dislocation. The sudden impact in car crashes can cause the knee to twist or bend unnaturally, forcing the bones out of their normal alignment. The combination of high-speed collisions and the body's positioning during impact can contribute to severe knee injuries, including dislocations.
Hard falls
Falling directly onto the knee or landing awkwardly after a fall can cause enough force to dislocate the knee joint. Whether slipping on ice, tripping over an object, or falling from a height, the impact on the knee can exceed its normal range of motion, causing the bones to shift out of place.
Hard falls can occur in various settings, from everyday accidents at home or workplace mishaps to outdoor activities or recreational pursuits, so you should always use safety measures to avoid hurting your knees.
Obesity
Excess body weight can place increased stress on the knee joint, potentially increasing the risk of dislocation, especially in combination with other risk factors.
Dislocated knee treatment
The treatment for knee dislocation varies depending on the severity of the injury. Some cases of knee dislocation require surgery, while others do not. To determine the appropriate treatment, you should first seek medical help to diagnose your injury. Immediate medical attention is recommended for a severely painful dislocated knee.
How is a dislocated knee diagnosed?
At the hospital, the medical team will give you pain relief medication and thoroughly check your knees. They will ask about the circumstances of the injury, examine the knee for deformities or swelling, and evaluate its range of motion. Additionally, your doctor may press on different leg parts to check for ligament damage, which helps keep your knee stable.
Several diagnostic tests will be performed to determine the most suitable treatment plan:
- Ankle-brachial index test: This evaluates changes in blood flow by comparing ankle and arm blood pressure. Lower numbers may indicate circulation issues due to the dislocation.
- Electromyography: This test assesses your muscle and nerve function.
- X-ray: X-ray is used to confirm dislocation and detect any broken fractures.
- MRI: This imaging technique helps identify ligament and soft tissue damage. This will also guide the surgeon in rebuilding your knee. MRI or ultrasound can also detect nerve injuries associated with the dislocation.
How is a dislocated knee treated?
The treatment for a dislocated knee will depend on the severity of your injury. There are several treatment options available: first aid or self-care while waiting for medical help, reduction for less severe knee dislocations, and surgery for significant knee damage.
First aid
If you suspect a dislocated knee, it’s important to seek medical help immediately.
Avoid trying to reposition the knee back into place yourself, as this could cause further damage.
To reduce the pain and swelling in the affected knee, you can also rest the knee, apply ice packs for 10-20 minutes every few hours (avoid applying ice or heat directly to the skin; instead, place a towel over the cold or heat pack before applying it to the skin), use a compression bandage to reduce swelling, and elevate the injured or sore area with pillows. Maintain this elevation whenever you are sitting or lying down.
Reduction
Once your diagnosis is complete, the doctor will attempt manual repositioning of the knee, a process called reduction. You will receive sedatives and pain medication to reduce the pain. The doctor will first correct the knee joint and then examine it with an X-ray.
In most cases, a kneecap dislocation injury can immediately be fixed by a trained healthcare provider.
After a reduction, a brace, support, or splint may be used to stabilise the knee and aid in healing. You should also participate in a physical therapy program to restore knee strength, stability, and range of motion. This therapy not only prevents future dislocations but also improves overall knee function.
Surgical treatment
If there is significant damage to your bones, cartilage, or tendons, surgery may be necessary to repair ligaments, tendons, or other damaged structures in the knee. Surgery could also be needed if your kneecap keeps dislocating or if it’s chronically unstable. Repairing and strengthening these parts can help make your knee more stable.
Sometimes, if your kneecap dislocation is something you were born with, surgery is the only way to fix it. The surgical intervention can address underlying structural issues and restore proper knee function.
Dislocated knee recovery time
The recovery time for a dislocated knee can vary depending on your injury's severity, associated injuries, and individual healing rates.
However, you can usually start walking with the affected knee within a few days. The recovery time can vary based on how severe the dislocation is, any related injuries, how well you heal, and how closely you follow your treatment plan and rehab exercises.
Your doctor might recommend wearing a knee support for about two weeks to help it heal. If walking is painful, using a crutch can provide some relief.
The Elastoplast Protective Knee Support provides relief to support dislocations, and weak or injured knees, helping to protect them from further injury. This support provides moderate support during activities, with adjustable compression to suit your needs. The 360° Support Technology ensures wraparound support and stability, Dynamic Pressure Adjustment reduces overstraining and relieves pain, and the Thermo-Tech material provides warmth to support circulation and recovery.
Elastoplast Protective Knee Support
The Elastoplast Protective Knee Support provides relief to support dislocations, and weak or injured knees, helping to protect them from further injury. This support provides moderate support during activities, with adjustable compression to suit your needs. 360° Support Technology ensures wraparound support and stability, Dynamic Pressure Adjustment reduces overstraining and relieves pain, and the Thermo-Tech material provides warmth to support circulation and recovery.
How long do I need to be on crutches after a dislocated knee?
If you have a severe knee dislocation, it is usually recommended to use two crutches for seven to 10 days and to only put minimal weight on the foot with each step. After 10 days, most people can advance to one crutch for short distances. After three to four weeks, when you can comfortably bear weight with a hinge brace, you can start using just one crutch for a few more days, and then you won’t need crutches anymore.
How can I prevent a dislocated knee?
Once your knee has dislocated, unfortunately, it’s more likely to happen again if it’s similarly injured. Accidents are hard to prevent, but there are some contributing factors that you can try to reduce the risk, like comprehensive rehabilitation, warming up thoroughly before exercise, and using a protective knee support.
Comprehensive rehabilitation
It is important to diligently follow your physical therapy to fully recover from a dislocated knee. The exercises are intended to strengthen the muscles that stabilise your knee and improve its movement. Avoid putting excessive strain on the leg too soon and allow sufficient time for proper healing.
Learning and implementing correct techniques and body mechanics during sports, exercise routines, and daily tasks can significantly reduce sudden twists and impacts on knee joints.
Do a lot of stretching
Include stretching in your routine to keep flexible. It’s important to strengthen different muscle groups that support and stabilise your knee, so no single group gets overloaded. Stretching also helps each muscle group keep its full range of motion. Working with a physical therapist or personal trainer can help create a custom plan for long-term muscle health.
Use protective gear or a knee support
Reduce the risk of sudden knee injuries by wearing suitable protective gear such as knee supports during activities prone to knee stress, including sports like football, basketball, or skiing.
- For everyday activities, the Elastoplast Protective Knee Support provides protection and relief for weak or injured knees. You can adjust the compression level based on your personal needs.
- For athletes, runners, or regular exercises, using the Elastoplast Performance Knee Support offers strength, protection, compression, and stability for stiff, weak, painful, or injured knees. This knee support provides moderate reinforcement during sports or other physical activities.
Read more common questions and helpful answers about knee dislocations in our Frequently Ask Questions below.
FAQs about knee dislocations (4)
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Can you walk with a dislocated knee
Walking with a dislocated knee is typically very painful and difficult. Since the knee supports weight and movement, dislocation severely compromises leg stability and function. It's generally advised not to walk or put weight on the affected leg until a healthcare professional evaluates and treats it. Doing so can worsen pain and further damage the knee.
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How to fix a dislocated knee at home
Getting immediate medical help for a dislocated knee is important since trying to fix it at home can make things worse. While waiting for help, keep the knee still to avoid more pain and movement; use pillows or cushions to support your leg comfortably. Apply a cold pack or ice wrapped in a cloth to your knee for 10-20 minutes every few hours to reduce swelling and numb the pain. Never try to pop the knee back into place yourself — leave that to trained medical professionals.
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What does a dislocated knee look like?
If you've dislocated your knee, it may look misaligned or swollen compared to the unaffected one, and you'll likely experience severe pain, limited motion, instability, and bruising around the knee and thigh. Immediate medical attention is important for proper diagnosis and treatment to prevent complications.
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How to use a knee support to avoid a dislocated knee
Using a knee support could help you prevent any future knee dislocations, or help you recover from light and kneecap dislocations. You can follow these easy steps to apply a knee support or read more about how to wear a knee support here.
- Place the knee support with the smooth side facing you and align the hole with your kneecap.
- Cross the top straps behind and above your knee, securing them to the front of the support while keeping your leg stretched and the support in position.
- Next, cross the bottom straps behind your knee and attach them to the front of the support. Adjust the straps to adjust pressure levels for your comfort.