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Aim

Assessment of transfemoral amputees using C-Leg and Power Knee for ascending and descending inclines and steps. Erik J. Wolf, PhD; Vanessa Q. Everding, MS; Alison L. Linberg, DPT; Barri L. Schnall, MPT; Joseph M. Czerniecki, MD; Jeffrey M. Gambel, MD. Aim

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Aim

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  1. Assessment of transfemoral amputees using C-Leg and Power Knee for ascending and descending inclines and steps Erik J. Wolf, PhD; Vanessa Q. Everding, MS; Alison L. Linberg, DPT; Barri L. Schnall, MPT; Joseph M. Czerniecki, MD; Jeffrey M. Gambel, MD

  2. Aim • Compare biomechanics of ramp and stair descent and ascent for participants using C-Leg and Power Knee (PK). • Relevance • Adding active power to prosthetic knee unit may improve function and reduce overuse injuries in persons with transfemoral amputation (TFA). • Servicemembers with TFA are often young and motivated to perform at high functional levels.

  3. Methods • We collected temporal-spatial and kinetic data as subjects equipped with retroreflective markers ascended and descended instrumented staircase and 12 ramp at their comfortable pace.

  4. Results • Knee power generated by nondisabled limb during stair ascent was significantly greater for C-Leg than PK. • Knee power generated by prosthetic knee unit was significantly greater with PK. • Although PK reduced power required from nondisabled knee during stair climbing, it did not appear superior to C-Leg for other tasks.

  5. Conclusions • Adding power to prosthetic knee may reduce wear on nondisabled limb. • However, certain limitations still require improvement.

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