Outcomes
tissue damage
PRESSURE INJURY
The primary outcomes for efficacy assessment were differences between the 2 groups in interface pressures. The pressure measures of interest were: (1) the absolute count of sensels with pressure readings greater than 40 mm Hg; (2) the mean interface pressure across all sensels under the participant’s body (excluding sensels with 0 mm Hg reading); and (3) the proportion of participants who had pressure readings greater than 40 mm Hg. An average pressure of 32 mm Hg was previously referenced as a pressure threshold for tissue damage, but this has not been well validated.Secondary outcomes consisted of pressure-related skin and soft tissue changes in areas at risk of PI determined on a skin assessment performed by the research nurse after 72 hours and PI risk assessment by Braden score done at baseline and after 72 hours of monitoring. PIs were graded according to the National Pressure Injury Advisory Panel Pressure Injury Stages.