The addition of active power to a prosthetic knee unit may improve function and reduce the potential for overuse injuries in persons with transfemoral amputation. The goal of this article was to compare ramp and stair descent and ascent for servicemembers with unilateral transfemoral amputation using the C-Leg and the Power Knee. Results showed significant differences between the knee units specifically in the amount of extra power required from the sound limb during stair climbing while using the C-Leg. Results also showed greater walking speed during ramp descent and significantly less stance time on the nondisabled limb. In conclusion, there were significant differences between the two knee units during ramp and stair ascent and descent. With improvement, the addition of power to a prosthetic knee may reduce the impact on the nondisabled limb of persons with unilateral transfemoral amputation; however, it appears that the technology may not yet be advanced enough to provide benefit over other microprocessor knees.
Volume 49 Number 6, 2012
Pages 831 — 842
Last Reviewed or Updated Thursday, August 16, 2012 11:31 AM