D-Rev 7,351 Amputees fit

ReMotion Knee
Previous Versions

Changes to ReMotion Impact Dashboard

At D-Rev, impact is our currency. Impact is how we measure the success of our programs, and we strive to report it with clarity and accuracy. As we prepare for the official public launch of the ReMotion Knee you will notice a few changes to our Mobility Impact Dashboard. We now differentiate amputees fit with the ReMotion Knee, the Jaipur Knee, and ReMotion prototypes, and we temporarily removed some of the main impact indicators.

This post is our attempt to answer all of your burning questions about how we collect ReMotion impact data, why it’s important to us, and why we are making changes. As always we are happy to answer individual questions via remotion@d-rev.org.

What’s the difference between the JaipurKnee and the ReMotion Knee?

The JaipurKnee is a prosthetic knee joint designed in collaboration between a student group at Stanford University and Bhagwan Mahaveer Viklang Sahayata Samiti (BMVSS), also known as the Jaipur Foot Organization. The JaipurKnee was designed exclusively for use by BMVSS clinics, which manufacture the knee locally in India and fit it as part of their proprietary systems. As of April 2015 6,800 patients have been fit with the JaipurKnee by BMVSS.

D-Rev, having absorbed all of the Stanford student team staff and IP, designed the ReMotion Knee to address a global need for high-quality prosthetic knees. (See more in our History of the ReMotion Knee blog post) The ReMotion Knee will be centrally manufactured and distributed to clinics around the world. Going forward, D-Rev will focus exclusively on delivering the ReMotion Knee to the highest need clinics and patients.

Knee compare

How will the Mobility Impact Dashboard change?

From July 2015 until early 2016 we will only report one number for the Mobility program—total Amputees Fit. We are continuing to update the Amputees Fit number for the JaipurKnee because it is an integral part of the ReMotion story, but after the launch we will be focusing monitoring and assessment entirely on the ReMotion Knee.

New dashboard

We care about outcomes (impact!) more than output (activities), but we believe in accurately representing the data we have. We’ll therefore be removing our outcome indicators on our dashboard (79% compliance rate, 86% satisfaction rate, 95% no failure rate) until we have ReMotion Knee-specific outcome data in early 2016. Stay tuned for that update next year.

All of the information about impact to-date as of July 2015 can be found on the “Previous Versions” tab of the Mobility Impact Dashboard, where we share country-specific impact data from the JaipurKnee.


How will we track the impact of the ReMotion Knee?

We will track five main impact indicators based on sampling from our customers:

  1. Amputees Fit: the total number of amputees who are fit with the ReMotion Knee

  2. Amputees who otherwise would not have access to effective prosthetics: the number of amputees fit with the ReMotion Knee who otherwise would not have a prosthetic that fits their needs

  3. Compliance Rate: the percentage of amputees who continue to use the ReMotion Knee six months after fitting

  4. Satisfaction Rate: the percentage of amputees who are satisfied with the ReMotion Knee six months after fitting

  5. Failure Rate: the percentage of ReMotion Knees that break and require replacement

We have been developing useful and meaning impact indicators, protocols, and methods for evaluating the ReMotion Knee in parallel to designing the knee itself over the past two years. Just as we assess product prototypes and iterate, we have been doing the same with how we collect data.

If you have further questions, please get in touch. Stay tuned, and get ready for the launch!

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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.