| 摘要 |
A above knee prosthesis (P) applied to femoral connection (100) of an amputee that comprises a upper hinge (1) connected to femoral connection (100) of the patient, an articulation axis (2) with the function of reproducing the knee movements, a tibia-calf muscle unit (3) pivotally connected to the femoral segment (1) and a damper (5) that reproduces some functions of the calf muscle and ensures to the prosthesis (P) to brake and to allow the sequential swing and stance phases typical of the gait. The damper (5) comprises a cylinder (5c) wherein a piston (10) and a stem (9) act connected to each other and adapted to carry out a damping reaction of said damper responsive to the forces loaded on the prosthesis. In particular, a force transducer is provided in the damper (5) arranged, in particular, in the stem (9) with a microprocessor that receives a force signal from the transducer and operates means for adjusting the reaction of the damper responsive to the detected force signal. Exemplary embodiments are equipped with means for adjusting the gait parameters during a gait cycle, means for exploiting the energy dissipated by the prosthesis, means to assist the charge and the change of batteries, means to know the direction and/or the intensity of resultant forces transmitted through the prosthesis. |
| 主权项 |
1. A prosthesis for above-knee amputees, said prosthesis having a femoral segment, which can be fixed to a femoral connection, and a tibial segment pivotally connected to each other about an articulation axis that reproduces the knee movements, said tibial segment being articulated by an ankle to a foot having toes, a sole of the foot and a heel, wherein said knee movements comprise a swing phase, between bringing the toes off the ground and landing the heel, and a stance phase, comprising landing the heel, loading the sole of the foot and bringing the toes off the ground, a hydraulic damper being provided having respectively a upper hinge and a lower hinge connected respectively with said femoral segment and said tibial segment and damping the relative movement of said tibial segment with respect to said femoral segment, so that in the stance phase the tibial segment is braked with respect to the knee articulation between said femoral segment and said tibial segment, wherein the hydraulic damper comprises a cylinder-piston and a stem connected to said piston, and a microprocessor is provided for adjusting the damping reaction of said damper wherein a force transducer is provided in said stem, and the microprocessor receives a force signal from said force transducer on the stem and adjusts the damping reaction of said damper responsive to the force signal from the stem. |
