Power absorption and generation at the ankle is critical to gait efficiency, joint health, and safety. For amputees, it's also an important factor n residual limb health. Recently, research and commercial efforts have resulted in powered foot-ankle systems, which provide powered- plantarflexion electromechanically, reduce metabolic costs of walking, and show reductions in pathological loading of the contralateral limb. However, these devices are complex, expensive, heavy, and physically large - all factors which limit widespread adoption. The objective of the energy-harvesting mesofluidic impulse prosthesis (e-MIP) is to create an inexpensive, lightweight foot-ankle system which doesn't require a net energy input for powered plantarflexion and swing-phase dorsiflexion. The energy density and bandwidth of high pressure, meso-scale hydraulics enables an ankle that can seamlessly harvest the energy normally dissipated in gait;store it in fluid-accumulators;and reapply it in controlled, well timed power impulses. The benefits of powered systems are therefore realized in an anthropometric size and weight, with a system complexity that is clinically viable.

Public Health Relevance

The energy-harvesting mesofluidic impulse prosthesis (e-MIP) is a prosthetic foot-ankle system which biomimetically harvests energy available at the ankle during gait. It reapplies this energy in controlled impulses to enable better metabolic efficiency of gait, reduced socket pistoning, and healthier joint loading dynamics for amputees.

Agency
National Institute of Health (NIH)
Type
Small Business Innovation Research Grants (SBIR) - Phase I (R43)
Project #
1R43HD080309-01
Application #
8715252
Study Section
Musculoskeletal Rehabilitation Sciences Study Section (MRS)
Program Officer
Quatrano, Louis A
Project Start
Project End
Budget Start
Budget End
Support Year
1
Fiscal Year
2014
Total Cost
Indirect Cost
Name
Orthocare Innovations, LLC
Department
Type
DUNS #
City
Mountlake Terrace
State
WA
Country
United States
Zip Code
98043