C-Leg microprocessor-controlled knee joint
Reclaim your determination.
The best C-Leg of all time.
C-Leg’s greatest strength is helping people achieve independence. The mechatronic leg prosthesis system is trusted by as many users worldwide. More than 60,000 fittings for people with transfemoral amputations have been carried out since 1997. With its numerous innovative features, the new C-Leg marks the start of a new era: It’s the best C-Leg of all time – safer, more dynamic and easier. From stairs and ramps to varying surfaces and walking backwards – the C-Leg leg prosthesis system adjusts itself dynamically to various everyday situations. A relaxed standing position with a slightly flexed knee is intuitive now. Also new are the design and the option of controlling the knee joint via an app. Finally, we’ve taken the stumble recovery function to an even higher level.
Electronic control unit
The integrated microprocessor receives and processes sensor signals. It controls the movement of the knee joint in real time.
Integrated Bluetooth® technology permits straightforward communication with the joint. An existing connection is displayed with an LED. Bluetooth® can be deactivated if necessary.
A lithium-ion battery provides energy for controlling the knee joint. It is located right in the rotation axis of the C-Leg. If you use the C-Leg on a daily basis, we recommend that you always charge the battery overnight.
Knee angle sensor
The knee angle sensor provides important data: It measures the flexion angle and angular velocity of the joint.
The hydraulic unit controls the C-Leg. It generates movement resistance for flexion and extension during the stance and swing phase.
New carbon frame design
In order to withstand the varied demands of everyday life, the frame is made of carbon – an especially strong, high-grade and lightweight material. The frame houses and protects the electronics, the hydraulic unit and the battery.
Thanks to its new design, the C-Leg has a lower system height and therefore a larger fitting spectrum.
Inertial motion unit (IMU)
The gyroscope and acceleration sensors allow the position and acceleration of the C-Leg in space to be measured.
Prosthetic Control is based on motion analysis and additional force determination.
Ready to reclaim your life? Get to know the difference between the microprocessor knees yourself at a prosthetist near you.
Benefits at a glance
More freedom of movement
Thanks to a new, patented method for controlling the C-Leg prosthesis system, the user’s sequence of movements has become significantly easier – for example on challenging surfaces such as sand, grass or gravel. The flow of smaller step sequences and the user’s gait pattern when changing walking speeds are controlled more smoothly. Even if you’ve never worn a C-Leg before, this technology typically makes the adjustment period even short.
Fluid movements occur first and foremost when the prosthesis responds quickly to different everyday situations. The resistance of the C-Leg adapts to all walking situations in real time, whether on level ground, stairs, ramps or varying surfaces. This gives you a noticeably smoother and more reliable movement pattern – and energy for the more important things in life.
Select the stance function yourself
The C-Leg supports you when standing. Using a discreet movement pattern, you can assume a relaxed position with a slightly flexed knee. You might already be familiar with this function. It is especially comfortable on slopes and uneven surfaces. A new feature of the C-Leg is that your prosthetist can alternatively set the intuitive stance function at your request. With this function, the joint detects from your movement when you’d like to stand in a relaxed position and when you need support for your next step.
Stumble recovery for enhanced safety
The C-Leg leg prosthesis system has always put the user’s safety in numerous everyday situations first. A large number of studies have proven that the frequency of falls in people with a transfemoral amputation is significantly lower with the C-Leg in comparison to conventional prostheses. This makes the C-Leg one of the most reliable leg prosthesis systems out there. Scientific research shows that this increases confidence in the prosthesis and that users pay greater attention to their surroundings. We’ve taken the stumble recovery of the C-Leg to a new level: It is now even more precise and offers greater stability.
Another new feature is the automatic sitting function. This function helps you assume a relaxed position after sitting down, as the joint swings freely.
Smart control via app
For the first time, the Cockpit app lets you control the C-Leg directly using your smartphone (Android) and access information regarding the joint, such as the battery level. The C-Leg communicates with the app via integrated Bluetooth.
Wet or dry
The C-Leg is weatherproof and therefore protected against splashed water. So a sudden shower during a walk is no longer a problem for the prosthesis wearer.
Protection and attractive design
The C-Leg Protective Cover safeguards the prosthesis system against jolts, the environment and normal wear and tear. It consists of a robust main protector component, a shield insert for the front side as well as a foot cuff. The Protective Cover also gives the leg a natural volume under long clothing.
The C-Leg technology provides intelligent control of the prosthesis system for people with a transfemoral knee and hip disarticulation amputation and adapts it to their gait pattern in real time. Behind this is a complex sensor system that captures data in real time and recognises which phase of walking you are in, whether on level ground, going down stairs step-over-step, or on slopes – and now on difficult surfaces such as forest floor, sand and gravel as well. This makes the C-Leg one of the most reliable leg prosthesis systems available. Thanks to the prosthesis’ capacity to adjust itself, the user can also master small obstacles, unclear terrain or large crowds.
Information for users
This brochure provides you as a user with comprehensive information regarding the C-Leg prosthesis system.
- download 800.74 kB | PDF
Instructions for use for users
This product information is intended for users of the C-Leg prosthesis system.
- download 5.87 MB | PDF
Information for technicians
In this brochure, you’ll find everything that you as a technician need to know about the C-Leg.
- download 623.51 kB | PDF
International C-Leg studies
Learn more about the C-Leg prosthesis system from international studies.
Numerous scientific studies have investigated the advantages of C-Leg technology for people with a transfemoral amputation in detail. Among other things, these studies have proven that the frequency of falling is much lower with the C-Leg compared to other leg prosthesis systems. The system therefore has a high level of reliability. In addition, the prosthesis wearer does not have to concentrate on his/her C-Leg all the time, but can move more freely in everyday situations. The studies further show that C-Leg users have more confidence in their prosthesis, are able to
boost their activity level and consume less energy while walking. They are able to cover longer distances.
You can obtain the C-Leg from a prosthetic service provider. A qualified prosthetist will advise you and adapt the prosthesis to your individual needs.
Can I just try out a C-Leg leg prosthesis system in the situations that are part of my everyday life?
Many practitioners offer a trial fitting. Just talk to your prosthetist. The trial fitting takes place over a predetermined period of time and is monitored by Ottobock when needed.
A prosthetic fitting includes all components from the foot to the knee joint system, including the socket, which will be customised to your individual needs by your prosthetist. Of course the assembly and setup of the system are also included, as well as regular service inspections during the entire period you use the C-Leg.
A vibration signal notifies you in good time when the battery is getting low. Once the battery is drained, the C-Leg automatically switches to safety mode so that resistance in the stance phase remains activated.
No. However, the C-Leg is weatherproof and therefore ideally equipped for various everyday situations.
Many users with a transfemoral amputation are able to walk down stairs stepoverstep on the first day with the C-Leg leg prosthesis system. Thanks to the system’s faster response capacity, the adjustment period is short. On the other hand, it can also take several days or weeks until you have internalised using and walking with the leg prosthesis system in your everyday situations. This depends on the individual, since everyone has different requirements.