Refinement of the Comprehensive Mobile Assessment of Pressure (CMAP) System for Prevention of Pressure Injuries

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Objectives: The long-term goal of this project is to improve the effectiveness of pressure injury prevention education by clinicians and self-management by Veterans with spinal cord injury (SCI) through a methodical development and testing of a mobile platform based pressure mapping system called “Comprehensive Mobile Assessment of Pressure” (CMAP). The targeted risk-reduction behavior in this project is the effective use of weight shifts when sitting in a wheelchair by improving consistency, frequency, duration, and quality of movements to redistribute pressure. CMAP provides visual cues as well as individually customizable reminders that are designed to compensate for the lack of sensation that prevents the use of natural cues to redistribute pressure, by wheelchair users. An updated CMAP system will serve two important objectives: 1) assist clinicians in assessment, individualized goal-setting, and monitoring the Veteran with SCI’s progress toward pressure injury prevention behavior goals while in the hospital setting; and 2) assist clinicians with individualized setup and education of the Veteran with SCI for using the CMAP system in the home setting as a self-management strategy for pressure injury prevention. Specific Aims: The specific aims of this study include: 1a) hardware expansion to improve functionality of the CMAP system to add a docking and charging station and use of CMAP on a smartwatch based on Veteran preferences and 1b) software expansion to enhance clinical education for pressure injury prevention education, with requirements provided by clinicians; 2) determine usability of the refined CMAP system when it is integrated into patient education for Veteran’s with acute SCI during their inpatient rehabilitation stay, and 3) a determine usability and efficacy of the refined CMAP system for clinician-delivered pressure injury prevention education, followed by Veteran use of CMAP in their daily routines at home. Study Design: This four-year study will have multiple stages and will use a mixed methods approach that includes iterative focus groups and interviews with Veterans who have SCI and with clinicians who provide pressure injury prevention education to Veterans with SCI; self-efficacy and usability surveys for both Veterans and clinicians; pilot testing of CMAP during inpatient rehabilitation and testing during outpatient visits. Repeated measures will be used to evaluate changes within subject for completion of weight shifts while using CMAP, compared to periods when not using CMAP. Methods: During the first two years, improvements to CMAP hardware and software will be guided by experience- based design guided requirements learned about through iterative focus groups including Veterans with SCI/D (n=10) and clinicians (n=10). Usability will be measured at each iteration of development using the System Usability Scale (SUS) and the User Experience Questionnaire (UEQ). The focus groups will be repeated to ensure alignment between development progress and the requirements identified by the focus groups. During the inpatient pilot test, clinician (n=3) and Veteran (n=6) self-efficacy will be measured. Veterans will complete selected sub-scales from the Skin Care Belief Scale and clinicians will answer survey questions developed specifically around providing education for performing weight shifts effectively. Veteran progress toward weight shift goals will be measured through performance monitoring within the CMAP app; Actual performance will be assessed against the individualized goals set by the clinician. During the outpatient testing, Veterans (n=20) will use CMAP at home for 2 weeks after receiving education and individualized goals for weight shift performance by clinicians. While at home, trunk movements will be monitored via actigraphy to monitor weight shift frequency to compare to baseline trunk movement data, weight shift performance data within CMAP app, and finally, compared with individualized goals for performing weight shifts. Self efficacy and usability (SUS and UEQ) of the overall system in both settings will be measured.