NHS funding for Microprocessor Knees

Real life stories

What is the funding policy about?

NHS England has made the momentous decision to approve the funding of Microprocessor Controlled Knees (MPKs) for those living with above knee, through knee and hip disarticulation amputations. Over the next several years patients previously restricted to mechanical knees, will get access to some of the most technologically advanced and life-changing prostheses in the world. Sharing the same technology and providing the same benefits as the prosthetic knee joints used by the country’s serving and ex-service men and women, this news will revolutionise the lives of so many people.

Unlike mechanical knees, MPKs use an internal computer and sensors to monitor each step of the wearer’s walking pattern (gait cycle) and use this information to make real-time adjustments to the knee. These adjustments typically involve changes to resistance and make walking at various speeds easier, allow wearers to manoeuvre ramps and challenging terrain as well as facilitate walking down stairs step-over-step. As a result of this technology, patients often comment that their energy levels are much higher, they can do more, walk further and more often. Because of the enhanced safety systems in place within the knee, wearers also note a reduction in back pain; which is very common within the amputee population. For patients with hip disartulation amputations, this ultimate level of security is an absolute must in order for them to walk safely and confidently. All of these features are only a handful of the benefits that a microprocessor knee can offer a patient and this is truly what sets them apart from their mechanical counterparts.

By funding MPKs, the NHS is helping to improve the quality of rehabilitation for patients nationally and make a significant and positive difference in the lifestyles and health of amputees.

Download our MPK policy brochure on our ‘Downloads’ tab below, where you will also find the latest clinical evidence highlighting and proving the benefits of C-Leg.

What you need to know about the policy

What is available?

The funding means that amputees will have access to one of the safest and most popular MPK's on the market – the C-Leg. The C-Leg is the most widely used MPK across the world with more than 70,000 fittings carried out for people with transfemoral amputations since 1997. C-Leg is the most clinically studied microprocessor knee, is extremely reliable and has the ability to help people achieve independence.

The C-Leg 4 Microprocessor Knee

Now the C-Leg is available on the NHS, amputees now have the opportunity to experience life with increased safety and can reclaim their determination.

Launched in 1997 and in its fourth and most advanced incarnation, the new C-Leg 4 marks the start of a new era: It’s the best C-Leg of all time. The daily challenges that are faced by amputees all over the world are now a thing of the past. No longer do you need to concentrate on every step, whilst you are looking at the ground for any potential obstacles that lie ahead. The safety systems inside the C-Leg 4 have that covered so you can relax, look forward and enjoy life.

The most natural walking pattern

The main aim of a prosthetic knee joint is to replicate normal anatomical movement; with C-Leg 4 we are closer than ever to achieving this. The on-board sensors and microprocessors within the C-Leg 4 are constantly measuring information from the knee joint in real-time. Unlike other microprocessor knees, there is absolutely no delay from detecting a change, to adapting the settings to the new situation. Whether you’re walking down a slope, quickly changing your direction and pace of walking, or stopping abruptly to avoid danger, the C-Leg 4 has the technology to provide the wearer with the most natural and responsive walking pattern.

It's not all about walking

Life isn’t always about moving around. Sometimes the hardest thing for an amputee is to stand still in a comfortable and relaxed position, without having to waste energy controlling the movement in the knee joint. Without a C-Leg, simple things like standing outside in the garden on uneven ground, holding your child at the park or even certain jobs that require you to stand and face people can become a daily struggle. These situations can also often generate significant back problems and joint aches and pains. With C-Leg 4’s unique stance function, it naturally and intuitively allows you to stand completely safely on a slightly bent knee joint, and then when you’re ready to move, the movement is detected and will allow you to walk off without you even having to think twice.

Scientifically proven; world class safety!

During normal daily life, safety is of upmost concern to those who use a prosthesis. The C-Leg 4 has the most precise and safest Stumble Recovery feature in the market. Unlike other microprocessor knees and indeed our last C-Leg 3, the C-Leg 4’s Stumble Recovery function is armed and ready to support you immediately. C-Leg 4 does not need to detect a stumble to provide its enhanced level of support – it’s already prepared as soon as you start to swing through to take a step. This unique Stumble Recovery feature in the C-Leg 4 is certainly best in class. A large number of scientific research studies have proven that the number of falls in people with transfemoral amputations is significantly lower with the C-Leg in comparison to conventional prostheses.

MyModes and smart control via app

The C-Leg 4 lets you connect via Bluetooth to your knee by using the Cockpit App on your mobile device. Information such as remaining battery life and step count can be easily viewed and tracked. Patients can also use the app to activate and deactivate the C-Leg 4’s sitting function. This is extremely helpful when sitting in confined spaces where you may need to reposition your leg. Another feature of the app is its ability for users to switch between modes. No matter whether your hobby is golfing, dancing or riding a bike, C-Leg 4 allows amputees to programme their knee to a specific mode, so you can continue doing what you love.

Wet or dry

The weatherproof C-Leg 4 has an IP67 rating, meaning it is protected from damage against spalshed water or temporary submersion in fresh water up to 1 metre for 30 minutes. Now everyday activities such as washing the car or watering you garden are no longer a problem.

The finest protection

The C-Leg 4 Protective Cover safeguards it against knocks and scratches. It consists of a robust main protector component, a choice of decorative inserts for the front section as well as a foot cuff. The Protective Cover also gives the leg a natural volume and shape under clothing.

The Policy & Process

Available within NHS England centres only, the policy aims to help patients recover from the effects of amputation with improved rehabilitation and prosthetic choice. Patients will be prioritised for funding based on clinical need. Along with their clinical team, amputees will now be able to select the right prosthesis based upon their needs and will not be limited to mechanical options. There has been much documented evidence on the benefits and advantages of microprocessor knees compared to mechanical alternatives. MPKs provide wearers with more safety and stumble recovery software. This can reduce the risk of falls and their related injuries significantly. Patients who have trialled both mechanical and microprocessor knees also noted their improved mobility and independence when wearing an MPK.

The policy will allow above knee, through knee and hip disarticulation amputees, with a medium to high ability level, the opportunity to be fitted with a fully funded microprocessor knee on the NHS. All patients will need to follow the outlined treatment pathway, in order to qualify for MPK provision.

If you wish to be fitted with an NHS C-Leg 4 you need to contact your local NHS Prosthetist. You will then be assessed individually by your centre’s multi-disciplinary team (MDT). This could include your Prosthetist, Consultant, Physiotherapist and Occupational Therapist. The assessment will aim to gather your full patient history as well as understand the daily activities, needs and challenges you may face as an amputee. A physical examination may also be required. You will need to be able to demonstrate commitment to the rehabilitation programme required for fitting. You will then, along with your care team, outline clear rehabilitation goals you would like to achieve. The goals will be centred around your ability, needs, aspirations and must be able to justify the need for a C-Leg. Upon the successful completion of the above, your MDT can then organise a C-Leg 4 trial. Prior to your trial, you may need to be fitted with a new socket. The trial will last four weeks, allowing you to take the prosthesis home and get the feel of what using a C-Leg in daily life is like.

During the trial you may need to attend some physiotherapy sessions, where you will be taught how to get the most out of your C-Leg. You will also need to prove that you have enough strength and balance to activate the knee as well as sufficient physical fitness to walk outdoors with the prosthesis. You must also be able to master the control, operation and care of a C-Leg 4. Your Physiotherapist may also record how you walk on your current prosthesis, compared to your performance on the C-Leg following the trial. Referred to as outcome measures, these may include information on your mobility and noticeable changes that have taken place as a result of wearing your C-Leg. For example, if you have a history of instability documented through falls, stumbles or near misses it is imperative you share this information with your Prosthetist prior to your trial. Studies have found 64% of C-Leg wearers had a reduction in falls compared to wearing a mechanical knee2. If the results of your C-Leg trial illustrate a higher level of stability for you, this will be a key finding to support your need for a C-Leg. The easiest way to keep track of this is by keeping a diary of your daily activity. Upon successful trial completion and based on your care team’s recommendations, you may then be eligible to be fitted with an NHS funded C-Leg 4.

Eligibility Criteria

In order to be eligible for an MPK, patients must meet certain criteria stipulated in the NHS commissioning policy. Firstly, you must fall into at least one of the following categories:

- Single, above knee amputation

- Hip disarticulation amputation

- Knee disarticulation amputation

- Double, above the knee amputation

- Double lower limb amputation with at least one being at above the knee level

At a minimum, you must have the potential to walk with a mechanical knee at a medium to high speed as well as at differing speeds and simultaneously overcome most natural obstacles (mobility level 3 and 4). MPK funding candidates should be unrestricted outdoor walkers and be capable of walking more than 50 yards on level ground. Lower mobility patients may also be considered for funding, if it can be demonstrated through a trial that the use of a Microprocessor knee improves their mobility and environmental obstacle negotiation to the levels described above.



NHS MPK Policy Patient Guide

C-Leg 4 is now available on the NHS. Download our guide to the NHS MPK policy and learn more about C-Leg and what is available through the NHS.


C-Leg 4: User brochure

Download out latest C-Leg 4 brochure for end-users.


C-Leg 4: Clinical Evidence

Download our C-Leg 4: Clinical Evidence brochure. C-Leg is the most widely used and studied microprocessor-controlled knee on the market.


  • Who can have a MPK?

    This policy will provide funding for eligible lower limb amputees with an activity level of SIGAM D or above. This includes unilateral trans-femoral amputees and bilateral lower limb amputees, including those with at least one trans-femoral amputation who fall into the Mobis 3 and 4 categories.

    Knee disarticulation or hip disarticulation amputees with the same Mobis categories are also eligible for an MPK. However, a patient with mobility lower than K3 (SIGAM D) but can be improved through a MPK trial would also be considered.

  • What is the C-Leg?

    The C-Leg is the most trusted MPK across the world with more than 70,000 fittings carried out for people with transfemoral amputations since 1997. Studies have shown that the C-Leg is the safest microprocessor-controlled knee joint, extremely reliable and has the ability to help people achieve independence.

  • How do I get a MPK?

    If you wish to be considered for a MPK you should visit your local prosthetic centre to check

    if you are eligible. To be eligible for a MPK you must fit a certain criteria and if successful, a trial will be undertaken to see if it is the right option for you.


Ottobock UK

Our specialist Academy team are dedicated to providing outstanding support up and down the country. As well as being able to assist your prosthetist with the initial fittings, they are also on hand to answer any questions or concerns you may have. If you need to speak to one of our team please contact them on:

Alan Gordon - Alan.Gordon@remove-this.ottobock.com

Alan McDougall - Alan.McDougall@remove-this.ottobock.com