Evaluation of Shear Force Redistribution and Microclimate in Foam Dressings Indicated for Pressure Injury Prevention

Abstract

OBJECTIVE To understand the performance of a border and silicone version of a next-generation multilayered foam dressing (dressings A and B) compared with three commercially available wound dressings (dressings C, D, and E) in bench tests relevant for pressure injuries. METHODS Two methods were used. The first measured shear force transmission through dressings in low- and high-shear force scenarios compared with a control with no dressing. The second measured the dressings' microclimate (heat and moisture) compared with two controls: one with high moisture output and one with no moisture output. Statistical significance was determined using a 95% CI and t test with α =.05. RESULTS In the low-shear scenario, dressing A showed the lowest force transmission, whereas dressing B was not significantly different from dressings C and E. In the high-shear scenario, dressing D had a significantly higher percentage of transmitted forces compared with the other dressings, with dressing A showing the lowest force transmission but no significant differences among the other three dressings. Regarding microclimate, dressing A showed no significant difference in relative humidity in the dressing-indenter and dressing-surface interfaces, suggesting good breathability. Dressing E had the highest temperature at the indenter-dressing interface, significantly different from the other dressings (P