Controllable Transverse Rotation Adapter

Principal Investigator: Glenn Klute

The process of fitting prosthetic limbs to amputees can be a long process filled with trial and error, and it is exacerbated in lower limb amputees due to painful shear stress caused by torsional strain. While transverse rotation adaptors (TRA) have alleviated this problem somewhat by allowing some rotation, the stiffness of these devices is set at implantation and cannot be modified. The ability to adjust the stiffness of the TRA would be advantageous for different activities.

The University of Washington has developed a controllable transverse rotational adaptor (TRA) for adjusting torsional stiffness in lower-limb prosthetics. This technology allows for the adjustment of the effective actuator stiffness by manipulating motor position and gives users the ability to set impedance levels for varying activities.

An increased range of motion in prosthetic limbs presents opportunities to improve the fitting and rehabilitation of patients with limb prosthetics. It has the potential to avoid unnecessary tissue damage and prosthetic fatigue and to reduce the duration and cost of rehabilitation. Users will have the ability to adjust the stiffness in a prosthetic limb for specific uses, such as making it stiffer for maximal performance in sporting events or making is softer for normal walking.

For more info, contact: Lisa Norton

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