Assist-Knee: Energy-Harvesting Knee Prosthesis

Evaluation of an Energy-Harvesting Knee Prosthesis in Transfemoral Prosthesis Users

The purpose of this research is to validate the Assist-Knee design and function by collecting pilot data during the stand-to-sit-to-stand transition in transfemoral prosthesis users when using the Assist-Knee to harvest energy and return energy .

Inclusion Criteria:

• Unilateral transfemoral limb loss
• At least one year post-amputation and currently successfully using a prosthesis
• Uses modular endoskeletal prosthetic components
• Has bilateral normal range of motion
• Ability to perform the following activities:
• Walking ability or ability to take steps over 10 meters
• Upright standing stability
• Stand-to-sit stability (i.e. go from a standing position to a seated position independently)
• Sit-to-stand stability (i.e. rise from a seated position independently)
• Ability to communicate individual perceptions in the English language
• Ability to provide informed consent

Exclusion Criteria:

• Confounding injury or musculoskeletal problem
• Pregnancy
• Lower limb peripheral neuropathy
• Symptomatic cardiovascular disease or chronic obstructive pulmonary disease
• Not able to read and understand English
• Use of assistive devices for sit-to-stand and stand-to-sit (e.g. canes, walkers)