Soft, wearable exosuit for people with physical impairments

By marrying textile science with robotics, Conor Walsh, an Irish biomedical engineer, and a team of experts at the Harvard Biodesign Lab are revolutionizing how patients worldwide recover from traumas such as stroke and learn to walk again.

A soft, wearable exosuit for patients who have suffered strokes or have other mobility issues is in development. Fred Merz, Rolex photo

A soft, wearable exosuit for patients who have suffered strokes or have other mobility issues is in development. Fred Merz, Rolex Award photo

Marie Thibault, MD+DI November 15, 2016

Harvard researcher Conor Walsh – a 2016 Rolex Award Laureate – discusses his team’s development of a soft, wearable exosuit for people with physical impairments.

Wearable robotic technology in the form of powered exoskeletons is undeniably one of the most futuristic and appealing developments in the medical device field today. The devices help patients impaired by spinal cord injuries or strokes walk. As miraculous as these capabilities are, the next phase of this technology is already on the way—soft exosuits that can be worn under regular clothing.

Conor Walsh PhD, a core faculty member at the Wyss Institute for Biologically Inspired Engineering and the John. L. Loeb associate professor of engineering and applied sciences at the John A. Paulson Harvard School of Engineering and Applied Sciences, is one of ten 2016 laureate winners of the Rolex Awards for Enterprise. The 35-year-old Walsh, who is originally from Ireland, also heads the Harvard Biodesign Lab. He and his team of lab members and co-investigators are developing a soft robotic exosuit that not only offers walking assistance, but helps improve patients’ natural movement over time, according to awards press material.

Earlier this year, Harvard announced that the Wyss Institute for Biologically Inspired Engineering and exoskeleton company ReWalk Robotics would work together on the soft exosuit technologies. Walsh told Harvard’s Office of Technology Development at the time, “ReWalk brings commercialization expertise and experience in the area of wearable robotics and complements our translation-focused research. Ultimately this agreement paves the way for this technology to make its way to patients.”

According to Rolex Awards for Enterprise press material, the medical version could be available to patients in approximately three years.

Ahead of today’s award announcement, MD+DI emailed Walsh a few questions—read on for a short overview of his work:

MD+DI: What is the background on the exosuits and how did you come to create this?
Walsh: We started working on developing the exosuit technology in 2012, initially with the goal of helping healthy people walk with less effort, and in 2014 began exploring the possibility of adapting the technology for patients poststroke. It was clear that there was an opportunity as poststroke gait is characterized by asymmetric and inefficient walking and we felt that the exosuit could help restore the function of the impaired limb to help these patients walk better.
MD+DI: What challenges have you faced with developing the exosuit?
Walsh: Developing wearable robots or exoskeletons requires a diverse set of expertise from robotics, to apparel design to human biomechanics and physical therapy. We have a great team with all of these disciplines and we collaborate together to develop designs that can work synergistic with the wearer.
MD+DI: What are the main findings of your studies?
Walsh: We have shown that a unilateral, soft wearable robot (exosuit) can supplement the paretic limb’s residual ability to generate forward propulsion and ground clearance during walking and that one day may then help a person to train with a more normal walking behavior after stroke.
MD+DI: What should readers take away from your report?
Walsh: A key take away from our work is that delivering small levels of active assistance through a lightweight and non-restrictive interface can have a positive effect on the mobility of people with physical impairments.
MD+DI: Is there anything else you would like to add?
Walsh: I am a faculty member at Harvard and we undertake high risk research in my lab to generate new knowledge and technologies related to wearable robotics. Once we have demonstrated successful solutions to pressing problems it is also then important to be able to partner with industry so that these technologies can translate to society and have a positive impact on people’s lives. For the exosuit project, we have partnered with ReWalk Robotics and are now working together to develop a plan to bring the technology to those who can benefit from it.

Marie Thibault is the managing editor at MD+DI. Reach her at and on Twitter @MedTechMarie

Source MD+DI


Walking With Robots
Conor Walsh 2016 Laureate, Applied Technology Rolex Awards

“It’s not a replacement for normal rehabilitation therapy. It’s a new tool for extending and accelerating.”

Fifteen million people have strokes every year. Five million learn to walk again but the process can be slow, painful and costly. Conor Walsh is determined to change that. To accelerate and ease rehabilitation, the John L. Loeb Associate Professor of Engineering at the Harvard School of Engineering and Applied Sciences and his team of engineers, IT experts, apparel designers, clinicians and neuroscientists at Harvard University are making robots you can wear.

Light, textile, elastic and mechanized, the exosuit teaches damaged nerves, muscles, tendons and joints to function again. Tiny, powerful motors, pulleys, cables, movement sensors and intelligent software help wearers walk by making gentle corrections to movement and encouraging natural actions. Along with stroke victims, it has the potential to aid others with impaired mobility, including those with Parkinson’s disease, multiple sclerosis and the elderly.

Walsh had previous experience with rigid exoskeletons as a developer and test subject but when he arrived at Harvard, he was inspired by colleagues with expertise in soft materials: “I saw that if you had a softer, lighter suit that accentuated the right actions, was comfy to wear and didn’t encumber you, it could have huge biomedical applications.”

Source  Applied Technology Rolex Awards

Also see
Here’s how exosuits affect your joints in Medical Design and Outsourcing

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