What hand robotics does your competent? hospital currently have? NOTHING I BET! PURE INCOMPETENCE!
IIT Madras's R2D2 lab and CMC Vellore built PLUTO-H, a portable, gamified robot that brings hand therapy to stroke patients at the bedside or at home.
IIT Madras's R2D2 lab has built a robot that takes stroke hand therapy to the patient, with games that adapt to the patient's recovery. (Photo: IIT Madras via special arrangement)
Radifah Kabir Chennai, UPDATED: Oct 8, 2026 18:55 IST In the films, he is the smallest hero in the galaxy. R2-D2 is a barrel-shaped droid who speaks only in beeps and whistles. Yet whenever the rebels land in trouble, it is he who rolls forward, plugs into the nearest port and sets the machinery right.IIT Madras, a laboratory that shares his name has built a machine in much the same spirit. It is small, portable and uncomplaining. Its job is to help a stroke survivor do something we spend our lives taking for granted: use a hand again. The robot is called PLUTO-H, for Plug and Train Robot for Hand Rehabilitation, and it comes from the TTK Center for Rehabilitation Research and Device Development, known on campus as R2D2. It is led by Professor Sujatha Srinivasan and was co-developed with CMC Vellore. It will reach patients through Thryv Rehab, a startup born at IIT Madras.
THE HAND THAT RECOVERS LAST
A stroke strikes when blood stops reaching part of the brain, and the body often forgets how to obey. Rehabilitation usually begins with the legs, because a person who cannot stand cannot go home. The hand is the harder, quieter problem. “After that, for activities of daily living, you do need hand function,”
(The hands would probably recover much better if you had lever powered wheelchairs for getting around, You recover walking because you are required to get around. ANY HOSPITAL THAT DOESN'T HAVE THESE WHEELCHAIRS IS TOTALLY FUCKING INCOMPETENT!) Professor Sujatha tells India Today Digital. The robot guides the wrist and fingers through therapy movements, giving only as much help as the patient needs. (Photo: IIT Madras)Buttoning a shirt, holding a spoon and turning a key all ask the hand to do what it can no longer do. Therapy for it is slow, repetitive and laborious. A physiotherapist must sit beside the patient, moving the wrist and fingers through the same motions again and again, and giving resistance or help as needed.
A ROBOT THAT COMES TO THE BEDSIDE
7nbsp;Most rehabilitation robots are large machines in specialist centres, and the patient must travel to them. PLUTO-H reverses that arrangement. “The robot can be taken to the patient rather than the patient having to come to the robot,” Professor Sujatha says. It is light enough to be used from the hospital bed, at an early stage of recovery, and it can go home with the patient. It runs on a single motor, with interchangeable handles that let one device train several movements. These are the bending of the wrist, the turning of the forearm, and the opening and closing of the hand. Its assistance is adaptive, which means it gives only as much help as the patient needs. If a hand can manage part of a movement alone, the robot lets it. If the hand tires, the robot steps in. In Professor Sujatha's words, it functions "as a physiotherapist essentially.” THERAPY DISGUISED AS PLAY
Recovery after a stroke depends on repetition, and repetition is where most patients falter. The same movement, repeated hundreds of times, is dull.PLUTO-H therefore turns exercise into games. The patient steers a character or chases a target on screen, and the movement of the hand is the controller. The games adjust to performance, becoming harder when the patient does well and easing off when the patient struggles. “It keeps the patient engaged and doing it for longer periods of time, which is more beneficial,” Professor Sujatha explains. Thryv's own description speaks of goal-oriented training and data-driven insights, so that the progress of a hand can be tracked from one session to the next. EXTENDING THE PHYSIOTHERAPIST'S REACH
The robot is not meant to replace the therapist. It is meant to multiply one. “The ratio of therapists to patients who need therapy is very poor in India,” Professor Sujatha says. In the present model, one therapist often spends an entire session moving a single patient's hand. Under the new one, the therapist assesses the patient, sets the robot up and customises the programme. Then the machine carries on while the therapist moves to the next bed.The therapy stays under the supervision of the therapist and does not run unattended. FROM LAB BENCH TO STARTUP
India has a thin market for assistive devices. It is fragmented, price-sensitive and hard to reach, so private companies rarely rush to serve it. Professor Sujatha is frank about the difficulty of building hardware for it. “Hardware is a monster,” she says. Tooling and initial capital are heavy burdens for a young company. The R2D2 model tries to lift that burden. Its startups work out of R2D2 lab, and use the prototyping and testing facilities there, until they are ready to move out. The university absorbs much of the research and development cost, which keeps the final price within reach of patients. The aim, she says, is to build in the middle space, between cheap devices that users reject and expensive imports that are hard to service. PLUTO-H’s clinical journey is already well under way. IIT Madras said in 2025 that the robot was in routine use at about 11 clinics across India and had been used by more than 1,000 patients with hand impairments. The robot was developed by Professor Sujatha, Professor Sivakumar Balasubramanian of CMC Vellore's Department of Bioengineering, and Dr Aravind Nehrujee, who built it as part of his joint PhD at IIT Madras and CMC Vellore. A LAUNCH WITHOUT A DATE, A PRODUCT WITHOUT A WAIT
The formal launch will happen before the year ends, Professor Sujatha confirms, though no exact date has been fixed. The robot itself does not have to wait. "The product has gotten all the certifications required and is available for sale," she says. The makers are first installing it at a few centres. "We just want to make sure we have it installed in some places so we can direct people where to go if they need this therapy once they find out about it," she adds. The idea is simple. Once people hear about the robot, they will ask where they can get this therapy, and the team wants to have an answer ready. A DROID WORTH BUILDING
R2-D2 never carried a lightsaber. His genius lay in plugging into a broken system and quietly making it work. PLUTO-H’s makers share that modest ambition. Professor Sujatha says the aim of assistive technology is not pity but enablement, so that people look past a disability to the person and what they can do. A robot at a bedside, patiently coaxing a hand to open, may be a small thing. For a family waiting for that hand to return, it is the droid they were looking for.
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