Neurocognitive robot-assisted rehabilitation of hand function: a randomized control trial on motor recovery in subacute stroke.
Raffaele Ranzani, Olivier Lambercy, Jean-Claude Metzger and 7 others
PMID 32831097WHAT IT FOUND
Replacing one daily hand therapy session with robot-assisted training achieved motor recovery equivalent to standard care.
Both groups improved similarly. The robot did not prove superior, but it matched conventional therapy while remaining acceptable to patients.
Key findings
01Motor impairment recovery was equivalent between robot-assisted and conventional therapy groups at the end of the 4-week intervention.
02Both groups showed clinically meaningful improvements in upper extremity function, with no significant difference between them.
03Patients found the robot-assisted therapy motivating and comfortable, with high rates of recommendation to others.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
The study had a small sample size of 27 analyzed participants, which limits the precision of the equivalence estimates. Participants had mild to moderate impairment at baseline, so the results may not apply to patients with severe upper limb deficits. All participants received additional conventional therapy sessions alongside the study intervention, so the effect of the robot therapy alone cannot be isolated from the total rehabilitation dose. The lack of a measure for real-world upper limb use means it is unclear if the improvements translated to daily life activities. Participants and therapists were not blinded to the treatment allocation, which could introduce bias in subjective outcomes or effort.
Declared interests
The study was funded by the Swiss National Science Foundation, ETH CHIRP1 Research Grant, Olga Mayenfisch Stiftung, and ETH Zürich Foundation. Hocoma AG, a company that sells rehabilitation technology, is listed as a funder alongside the ETH Zürich Foundation.
The easy way to misread this
Do not interpret this trial as evidence that robot-assisted therapy is superior to conventional hand therapy. The study was designed to test equivalence, and it showed that the robot treatment matched conventional care. It did not demonstrate added benefit over standard practice, only that it is a viable alternative.