D-Rev 6,871 amputees fit with the JaipurKnee or ReMotion Knee
D-Rev 79% are still using the JaipurKnee
D-Rev 95% of JaipurKnees did not break
D-Rev 86% JaipurKnee satisfaction rate
D-Rev 14 countries where JaipurKnee or ReMotion Knee have been fitted
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Kamal was the very first patient to be fit with a JaipurKnee. Previously, Kamal used a bamboo staff to get around. Using the staff caused spinal misalignment and severely calloused hands. After being fit with the JaipurKnee, Kamal got a job at BMVSS serving patients waiting for treatment—a job his previous assistive device would have not have permitted him to do.

Sonu Kumar

Sonu Kumar hurt his leg in a traffic collision in 2008, and was fit with a JaipurKnee at BMVSS when he was 20 years old. He’s an electrician and was able to almost double his income (from 2,500 RS/mo. to 4,000 RS/mo.) after receiving his JaipurKnee. Watch Sonu ride a bike here. here.


Andres lost his leg in a motorcycle accident, but despite the accident he remains a motorcycle enthusiast. Before being fit with his Jaipur Knee, Andres would ride using his crutch on the peddle. Andres was determined to take advantage of the physical therapy offered to master his new prosthetic.


Vishamber was 13 years old when he was walking by the side of the road and got hit by a truck. Since being fit with his JaipurKnee in 2009 at BMVSS, Vishamber has been able to participate in the daily activities of his family, including farming. Much of Vishamber’s income after his fitting went towards loan repayments for his amputation surgery.


Purnima was 18 years old and studying to be an engineer when she was in a car accident that killed her younger brother and took her right leg. After her surgery, Purnima and her father traveled over 12 hours by train to the BMVSS clinic where she was fit with her JaipurKnee. After receiving her knee, she planned to return to school and complete her degree.


Eight-year-old Amin lost his leg in a 2009 collision while riding on the back of his father's motorcycle. He arrived at BMVSS in 2011 wearing a leg unit that was difficult to use and too heavy for Amin's frame. As he practiced his first steps after being fit with the JaipurKnee, Amin smiled shyly and told us, "This feels comfortable." Within hours, he was walking smoothly.

Mr. Rajindra

Mr. Rajindra was 16 when he was hit while riding on the back of a motorcycle and lost his leg. Before being fit with his JaipurKnee, he wore an exoskeletal knee for 15 years. Mr. Rajinda arrived at BMVSS wearing a stern expression, but a quiet smile lit up his face when he first put on his Jaipur Knee. Shortly after being fitted with his knee, Mr. Rajindra got a job as an electrician.


Agung was fit with the ReMotion Knee v3 in 2013. Agung was managing a construction site and the ReMotion Knee gave him the mobility and confidence to traverse unstable, uneven terrain and ride his scooter to and from job sites. For more about Agung, including a video of him walking with his ReMotion Knee, click here.


Over 9 million above-knee amputees in the developing world do not have access to the prosthetics they need to live more healthy, productive lives.

D-Rev’s intervention

By designing a low-cost, high-quality prosthetic knee that can be delivered through an economically self-sustaining distribution model, D-Rev aims to increase the availability and accessibility of quality prosthetics in the developing world.

Measuring impact

To measure our progress, we track four main indicators:

  • number of amputees fit
  • percentage of amputees fit who are still wearing their knee six months after the fitting (“Compliance Rate”)
  • percentage of amputees who report experiencing no mechanical failures of their knee (“Non-failure Rate”)
  • percentage of amputees fit who report being “satisfied” or “very satisfied” with their knee (“Satisfaction Rate”)

Quick Facts

Goal: Empower amputees through low-cost, high-quality prosthetics

Project started: 2008
JaipurKnee launched: 2008
ReMotion field trials: 2011-14

Current status: JaipurKnee continues to be fit by partner BMVSS in India. ReMotion Knee is in field trials and is expected to launch in summer 2015.

Total cost: $1.5 M*

Product manager: Vin Narayan

*Represents total project costs through December 2014. Last four quarters unaudited.