The microprocessor knee market is expanding with more than 10 knees already on the market and more on their way. This is good news for above-the-knee amputees. Support for activity levels now ranges from K1 users seeking improved safety for indoor mobility to active adventurers who want to run, bicycle, and even swim in the ocean.
Microprocessor knee technology has matured significantly in the past few years with near-universal support for:
adjusted support throughout the Stance Phase of the gait cycle;
optimized release points, ground clearance, and proper leg extension in the Swing Phase;
slopes, ramps, and stairs;
sitting and standing;
improved energy efficiency.
…all managed by increasingly sophisticated sensors and microprocessors. In short, microprocessor knees have finally reached the point where they can restore lost capabilities to millions of people. The only drawback is that they are still too expensive.
Below, you will find brief descriptions and links to more detailed articles on the top microprocessor knees currently on the market.
Introduced in 1997, with more than 75,000 fittings worldwide, the C-Leg is a proven bionic knee with excellent stability and dependability. At between $40,000 and $50,000 US for a complete solution, it is in the middle tier of pricing for bionic knees.
Ossur’s Rheo Knee is the only bionic knee to use a magnetorheological fluid (MRF) to manage its level of resistance. This makes the Rheo Knee more reactive to movements of the residual limb than its hydraulic competitors.
The latest version of Nabtesco’s Allux Knee (Allux 2) was launched in the U.S. in June 2017. Now distributed by Proteor USA, the Allux has some interesting features, especially its use of a 4-bar linkage system.