Usability of a device for lip strength and mobility rehabilitation associated with digital games: a pilot study.

The study was a pilot with a convenience sample and no sample-size calculation, so 11 adults and 9 children cannot show how the device will work in a clinic. The study reports usability scores for adults only; no child usability questionnaire is described. The adults were only 20 to 41 years old, so the usability finding does not cover older adults or children. The study did not measure lip strength, contraction duration, or muscle fatigue, so it cannot show a physiological benefit. The mouthpiece may be too large for children, and the authors state its size may have affected children's scores and needs adaptation. Subgroups were very small, including 4 children with normal lip tension and 5 with decreased tension, and sex could not be analysed. The System Usability Scale cutoff may not be appropriate for this specific rehabilitation device, and familiarity with digital games was not measured. Scoring different difficulty levels with different point values made direct performance comparison between users difficult.

The supplied text has a funding and conflicts of interest section, but it only states Financial support and does not name a funder or author disclosures.

Do not conclude that the device improves lip strength, speech, swallowing, or adherence. The study measured usability and game scores in 11 adults and 9 children, not clinical outcomes, and the authors state that quantitative strength and fatigue measures were not collected.