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Affordable Knee Replacement
Joshua Powers
JaipurKnee: a high-performance knee joint for developing world amputees
Addressing the Problem
• Over 25 million people in the world today are suffering from the loss of a limb
• Amputees looking to replace a missing limb turn to modern prosthetics
• Today’s prosthetics are unaffordable, leaving people around the world hopeless
Costs
• Partial foot ($14,187)• Ankle disarticulation ($16,356)• Hip ($45,633)• Transpelvic disarticulation ($49,208)• Transtibial, or below the knee ($16,690)
• Knee joint ($45,563)Most expensive and complex portion of a prosthetic leg
http://healthcaresavvy.wbur.org/2013/04/the-cost-of-prosthetics/
Who can afford it?
• Out of the 25 million people in the world suffering from the loss of a limb, only about 20% can afford the necessary prosthetics
• Amputees in third world countries do not have the money or resources for modern prosthetics
• Each year, disease and trauma in war torn areas of the world leave thousands of new, less fortunate amputees
Making affordable prosthetics…
• Today’s existing “affordable” prosthetics are limiting– Affordable leg prosthetics operate on a single-axis
hinge system – On rough terrain, single-axis hinges tend to be
unstable and can even buckle at times
Most affordable knee prosthetics used in the last ten years have been unsuccessful
What’s Needed
• The ideal prosthetic knee joint:– Lightweight– Durable– High range of mobility– Affordable– Simple
A Real Solution
• The JaipurKnee
• Designed in collaboration with Stanford University and the Jaipur Foot Organization
Reliable and Affordable
• Simple! 5 plastic pieces and 4 standard fasteners
• Easily integrated; works with standard prosthetic systems
• Cheap; $20 per unit
Specifics of the JaipurKnee
• Lightweight; 1.5 lbs• Durable; oil-filled nylon polymer self
lubricates!• 165 degrees of motion; bending/kneeling• Works with standard prosthetic systems• Bench top tested for 3-5 years of use
Impact
• 4,977 patients have been fit with ReMotion's JaipurKnee
• 79% of these patients are still wearing their prostheses
• 95% of patients report no failures in their JaipurKnees
Engineering for the future
• The D-Rev team aims to provide products that improve the health and well-being of people living on an income of less than $4 dollars a day
• Currently implementing products in India, Haiti, Nepal, Ecuador, Uganda, Kenya, Tanzania, Nigeria, Sri Lanka, Botswana, Bangladesh and Iraq.
Sources
• http://healthcaresavvy.wbur.org/2013/04/the-cost-of-prosthetics/
• The Journal of Rehabilitation Research and Development <http://d-rev.org/projects/remotion/design.html>
• http://www.popularmechanics.com/science/health/med-tech/7-medical-upgrades-for-developing-countries-2#slide-2
• http://healthcaresavvy.wbur.org/2013/04/the-cost-of-prosthetics/
• Matthew Karam, MD. Iowa Orthopedic Journal. <http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2958286/>
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