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Medial Collateral Ligament (MCL) Injuries

March 6, 2018

 

The MCL can be injured in isolation or in combination with other structures in and around the knee.  This information blog explains the functional anatomy of the ligament, how it is injured and the likely treatment plan. 

 

 

What is the MCL?

 

The MCL is a large ligament (connecting bone to bone) that runs on the medial aspect (inside) of your knee from the femur to tibia.   (See picture 1a and 1b below)

 

The ligament is composed of deep and superficial fibres and is important in stabilising the knee to valgus stress. (prevents opening up) 


 

 

How is it injured? 

 

The MCL can be injured in either twisting injuries or a direct impact to the outside of the knee, hence opening up the inside. (See picture 2 above) This usually occurs during sports such as football, rugby but can also occur during skiing or snowboarding where the ski or board increases the twisting force through the knee. 


 

What are the symptoms? 

 

Most patients experience pain at the inside of the knee after a twist, fall or a direct blow to

the outside. Usually by the next day the knee has swollen, which can often be significant, so that weight bearing through that leg is difficult. The pain and discomfort is mainly around the inside of the knee. This can be accompanied by a feeling of wobbliness or lack of control of the knee. 


 

What should I do?

 

The first line of treatment for any ligament injury follows the PRICE principle of Protect and Rest, (touch toe weight bearing with crutches) Icing (regularly - frozen peas wrapped in a tea towel to the swollen area), compression (a tubigrip support or neoprene support, if not too tight) and Elevation (when sitting raise your leg on pillows) It is also sensible to take simple painkillers such as paracetamol and if not contraindicated anti-inflammatories such as ibuprofen. These should be taken with food, as they can upset your stomach.


Some patients attend the emergency department or minor injuries unit - often an x-ray is performed but it rarely shows any bony injury. 


 

Do I need an MRI scan? 

 

An early review by an orthopaedic knee specialist (see contact details below) or a sports physiotherapist (see contact details below) is advised to give the correct and early diagnosis, so that a management plan can be instigated as soon as possible. MCL injuries can usually be diagnosed by history and examination findings alone but the diagnosis is often confirmed by an MRI (Magnetic resonance imaging) scan.  (see below)


 

Picture 3 and 4 – Courtesy of Dr J Stedman (Berkshire Imaging)


 

The benefits of such a scan are to rule out other damage to the other structures in and around the knee. (Anterior cruciate ligament injury, meniscal cartilage tear or damage to the articular joint surface) 


 

What types of MCL injury are there?       

 

The tears are graded inn severity as type 1,2 and 3. Type 1 injuries (sprains) are the least severe and heal fairly quickly, typically within 3-4 weeks. Type 2 injuries (partial ruptures) and Type 3 injuries (complete tears) take longer to heal (up to 6-8 weeks) but the good news is they always usually heal with time and a good rehabilitation program. 


 

Why is rehabilitation so important?

 

After any knee injury, the muscles that control and protect the knee (quadriceps at the front and hamstrings at the back) disengage very quickly, losing control and wasting quite rapidly.  Due to pain inhibition, you can lose up to half your quads muscle bulk within the first week (arthrogenic inhibition) and it can take up to 3 months to regain this bulk.

 

If you have access to a Compex®  machine (neuromuscular electrical stimulation) in the first few days post injury you can limit the amount of muscle wastage. The regular use of Compex®  can overcome this inhibition and therefore maintain quads strength and also therefore retain knee strength and optimise recovery.

 

Compex® is used by elite athletes but is being made more accessible. Physiolistic are Compex®  expert practitioners and also hire out the machines.

 

It is often this that causes prolonged return to sports and activities as the muscles take time to recover and build up again. 


 

Pictures 5 and 6 - Courtesy of Angela Botha, Physiolistic


Do I need a knee brace?

 

In some cases we do suggest a hinged knee brace for support in the first few weeks. This shouldn’t replace however a good rehabilitation program. It is important to allow and encourage the knee to move as soon as possible, so we are against straight leg braces, which exacerbate early wasting of the muscles and lead to further stiffness.

 

 Picture 7 – Courtesy of Craig Stenzel, Ossur UK

 

If you would like to meet me in clinic for an appointment about any knee injury or niggle please contact my secretary Debbie Rollason:

 

Telephone: 07305 097137 or email: nevdavies.secretary@gmail.com

 

I consult at all the main private hospitals in Reading as well as at Physiolistic specialist sports Physio in Henley-upon-Thames 

 

 

 Nev Davies

www.readinghipandkneeunit.co.uk

@mrnevdavies

 

 

 

 

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