Portable Hand Trainer: bringing hand rehabilitation closer to home
After a stroke, many people experience difficulties using their hand and arm in daily life. Grasping, holding or manipulating objects can become challenging, affecting independence, work, social participation and quality of life. Rehabilitation can help, but effective hand training often requires many repetitions over a longer period of time.
At the same time, rehabilitation care is under pressure. One-to-one therapy is labour-intensive, and not every patient can receive the amount of guided training that may be needed. This creates a need for rehabilitation tools that are effective, affordable and easy to use beyond the traditional clinical setting.
Within the Convergence Human Mobility Center, researchers are developing the Portable Hand Trainer: a compact robotic device designed to support hand sensorimotor rehabilitation after stroke.
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A portable trainer for hand rehabilitation
The portable hand trainer allows users to practice grasping movements with a flexible shell that fits around the hand. A small motor can provide reactive-resistive haptic feedback, meaning that users can feel resistance or force while interacting with virtual objects during training. The trainer is used in combination with engaging virtual exercises, making rehabilitation more interactive, motivating and potentially more personalized.
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Making rehabilitation technology simpler and more accessible
Many robotic rehabilitation systems are complex, expensive or mainly suited for specialized clinical environments. The Portable Hand Trainer takes a different route. It is designed to be low-cost, portable and user-friendly, with the longer-term aim of supporting minimally supervised rehabilitation, for example in group therapy or eventually at home.
A key feature is the combination of a simple physical device with meaningful haptic feedback. This allows users not only to move their hand, but also to feel interaction with virtual objects. That sensory feedback is important, because hand rehabilitation after stroke is not only about movement, but also about relearning how movement and sensation work together.
For rehabilitation technology to work outside the lab or clinic, it needs to be more than technically advanced. It has to be affordable, intuitive and motivating enough for people to actually use it
From prototype to practice
The Portable Hand Trainer has already been developed into a working prototype. A first usability study with non-impaired participants and therapists showed that the device was generally easy to set up and use, and provided useful feedback for further improvements.
The team has since updated the design to improve usability. Recruitment has started for a usability study with stroke patients at Rijndam Rehabilitation. These studies will help the team understand how patients and therapists use the device, what still needs to be improved, and how this type of technology could fit into future rehabilitation pathways.
If further studies show that the device is usable and effective for people recovering from stroke, the Portable Hand Trainer could help make hand rehabilitation more accessible. In the future, it may support more intensive practice without requiring continuous one-to-one supervision by a therapist.
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The power of convergence
The Portable Hand Trainer is a clear example of what the Convergence Human Mobility Center aims to achieve: developing user-centered technology for minimally supervised rehabilitation, with equal attention to clinical relevance, technical feasibility and accessibility.
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TU Delft contributes expertise in robotics, human-machine interaction, motor learning and user-friendly technology development. Erasmus MC and Rijndam Rehabilitation bring in clinical knowledge, rehabilitation practice and access to real-world testing environments. Together, these perspectives help ensure that the device is not only technically innovative, but also relevant for patients and workable in rehabilitation practice.
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That is where Convergence adds value: it brings together engineers, clinicians, researchers and end-users around one shared question: how can rehabilitation technology become simpler, more accessible and more useful for people who need long-term support after stroke?
Researcher involved
One of the researchers involved is Amy Bellitto. She works on low-cost, portable and user-friendly robotic systems for upper-limb sensorimotor rehabilitation after stroke. Her background is in robotics and human-machine interfaces, with a focus on supporting rehabilitation for people with neurological conditions. Contact: a.bellitto@tudelft.nl