BioSTEP: Transfemoral Prosthetic
Vy Ho, Lyndsy Shaubach, Daniel Yeisley
I. Introduction
II. Inspirations
IV. Design (Cont.)
The patient’s residual limb will be suspended and stabilized by the
four aluminum struts which distribute the load across the limb and are
covered by fabric with velcro strips that hold the padded insert. One
of the struts is designed to be free-hanging making it more adjustable.
The belts will be buckled around the struts in several places; one of
them will be wrapped around the opposite hip to help keep the
prosthesis comfortable and in the right place.
Sub-Saharan Africa is a prime example of the disparity
between a need and resources in place to mitigate that need.
The implementation of affordable and sustainable medical
technologies is paramount and the installation of prosthetics
would be a leap in the right direction.
Socket-less Socket
by Martin Bionics
($3,000 - $10,000)
Source:
Engineering.com
Northwestern University
Prosthetics-Orthotics Center
Socket: The interface between residual limb and prosthesis
Design constraints:
Infinite Socket
by LIM Innovations
($7,000 - $30,000)
Both of these designs use struts as external components that
support the limb via compression and are stabilized by multiple
buckle-ladders around the patient's’ residual limb.
• Comfort
• Adjustable
Base and attached struts
IV. Design
• Light-weight
• Durable
Stress analysis:
• Easy to manufacture in developing countries.
Full model with belts
Materials: 1060 Aluminum Alloy
Dimension: Designed for a 5’10” person
• Low-cost
Free-hanging strut
Load applied: 700N (approx. 157 lbs)
Safety factor: 3 (for statics) & 3.7 (for dynamics)
V. Acknowledgements
Dr. Eric Shoemaker for his expertise in prosthetics
Dr. Emily Farrar for advising us throughout the process
BioSTEP members for all the hard-work and the encouragements
Any material with a Yield Strength of greater than 30MPa
III. Client
Residual
limb
VI. References
“Socket-less Socket” - Martin Bionics
“Infinite Socket” - LIM Innovations
CURE International Hospital
in Kijabe, Kenya
“Healing changes everything”
VI. Contact us
Slip-cover with velcro attach
Residual limb fitting in the socket
Project adviser:
Primary contact:
Dr. Emily Farrar - [email protected]
Daniel Yeisley - [email protected]