About Dislocated Kneecap
Dislocated kneecap, also known as patellar dislocation, occurs when the kneecap slips out of its normal position in the groove of the femur (thigh bone).
Non-modifiable risk factors are factors that cannot be controlled. In the case of a dislocated kneecap, these include:
- Anatomical abnormalities such as a shallow groove in the thighbone or a misaligned kneecap.
- Naturally loose ligaments: Loose ligaments can contribute to increased mobility and instability of the kneecap.
- Trauma: Direct trauma or a sudden twisting motion can cause the kneecap to dislocate.
The modifiable risk factors are factors that can be controlled through lifestyle changes. For dislocated kneecap these include:
- Muscle weakness and imbalances: Strengthening exercises for the thighs and hip muscles can help improve stability and reduce the risk of patellar dislocation
- Training errors: Proper training techniques, including gradual increase of intensity and avoiding excessive stress on the knee joint, can minimize the risk of injury
- Overuse or repetitive activities: Engaging in activities that place excessive stress on the knee joint without proper rest and recovery can increase the likelihood of patellar dislocation
It's important to note that these risk factors may vary from person to person. Consulting with a healthcare professional is recommended to determine an individual's specific risk factors and develop an appropriate management plan.
The most common symptoms of a dislocated kneecap include:
- Knee pain
- Feeling that the kneecap has slipped to one side
- Popping or crackling sounds in the knee
- Stiffness and swelling
- Locking or catching sensation in the knee
- Feeling of instability
- Inability to move the leg or bear weight on the affected leg
It's important to seek medical attention if you experience any of these symptoms, whether they are early or later stage symptoms. A healthcare professional can evaluate your condition and provide appropriate treatment.
To diagnose a dislocated kneecap, healthcare providers typically perform several examinations, tests, and procedures. These may include:
- Physical examination: A doctor will assess the knee's appearance, range of motion, and stability. Changes in skin color or temperature around the area of injury may indicate blood vessel problems.
- Medical history: The doctor will ask about any previous knee injuries or dislocations.
- X-ray: This imaging test can help identify any bone fractures or abnormalities in the knee joint.
- Magnetic resonance imaging (MRI): This test provides detailed images of the soft tissues, such as ligaments and tendons, to evaluate their condition.
- Computed tomography (CT) scan: This imaging technique can provide more detailed information about possible bone fractures or damage.
- Arteriogram: In rare cases when blood vessel damage is suspected, an arteriogram may be used to assess blood flow through the arteries in the legs.
To determine the stage or severity of a dislocated kneecap, additional examinations and tests may be performed:
- Patellar apprehension test: This physical examination helps evaluate the stability of the kneecap.
- Electromyography (EMG) or nerve conduction velocity (NCV) tests: These measure nerve function in the leg and knee.
- Ankle-brachial index (ABI): This test compares blood pressure measurements between the arm and ankle to assess blood flow to the lower extremities.
Remember to consult with your healthcare professional for personalized advice regarding examinations, tests, and procedures for diagnosing and determining the severity of a dislocated kneecap.
The goals of treatment for a dislocated kneecap are to:
- Reduce the dislocation: The healthcare provider will perform a reduction, which involves moving the kneecap back into its proper position. Medication or sedation may be given to manage pain during this process. Medication types that may be recommended include nonsteroidal anti-inflammatory drugs (NSAIDs) like ibuprofen or aspirin to reduce inflammation and pain.
- Stabilize the knee: After reduction, a brace will be used to keep the leg stable and prevent the kneecap from moving again. Immobilization of the injured joint, usually done with splints, casts, or braces, may be used in some cases.
- Repair damaged structures: Surgery may be necessary to repair damaged ligaments, blood vessels, or nerves. This is especially important if there is blood vessel damage.
- Promote healing and prevent future injury: Rehabilitation, such as physical therapy, is crucial for restoring strength, range of motion, and stability to the knee. It helps prevent future dislocations and improves overall function.
Therapeutic procedures and health behavior changes that may be recommended include:
- RICE therapy (rest, ice, compression, elevation) to reduce swelling and pain
- Using crutches or a cane to take weight off the knee
- Wearing a brace or using shoe inserts (orthotics) for support and stress reduction on the knee
- Modifying activity levels to avoid further injury
- Strengthening exercises and physical therapy to improve muscle strength and joint stability
Each of these treatments works together to achieve the goals of reducing the dislocation, stabilizing the knee, repairing damaged structures, promoting healing, preventing future injury, and improving overall function.
Remember to consult with your healthcare professional for personalized advice as medication dosing may vary depending on individual circumstances. Other side effects can occur with medications, so it's important to discuss them with your healthcare professional or refer to the medication information provided.