Visualization of user interactions with a pressure mapping mobile application for wheelchair users at risk for pressure injuries.
Brianna M Goodwin, Christine M Olney, John E Ferguson and 5 others
PMID 33395558WHAT IT FOUND
Six wheelchair users with spinal cord injury used a pressure mapping app for seven days.
Most rarely indicated they completed prompted weight shifts, suggesting the live pressure map was more useful than the reminders. Users adjusted settings to reduce alerts after the first day.
Key findings
01Five of the six participants rarely indicated completion of weight shift reminders, regardless of how often they were prompted.
02Alert frequency decreased and stabilized after the first day, indicating participants fine-tuned settings to their specific body and wheelchair setup.
03Disconnection alerts between the phone and the system occurred daily for all participants.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTsWhat it means for SLPs
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What it does not show
The sample size was very small (n=6), limiting generalizability. Weight shift completion was based on self-report via the app, not verified by pressure data, so actual adherence may be inaccurate. The system did not automatically detect weight shifts, requiring manual user input. Baseline factors like technology aptitude, pain, or fatigue were not collected, which could influence engagement. This was a descriptive study of usage patterns, not a trial testing whether the system improves health outcomes or prevents pressure injuries.
Declared interests
The paper acknowledges research support from the N.I.H. and the U.S. Government, but does not report specific financial conflicts of interest for the authors in the provided text.
The easy way to misread this
Do not interpret the low self-reported adherence to weight shift reminders as evidence that the patients did not shift. The system required manual input to count a shift, and the authors note that patients may have found the live map more useful than the reminder function, or simply failed to log the action.