Wheelchair seat cushions can provide users comfort, positioning, and protection from pressure ulcers. Users and clinicians have little scientific research on cushion properties and performance to assist them with the cushion selection process. This study provides data on the interface shear and pressure characteristics of cushions, which are two risk factors for pressure ulcer development. Interface shear results from force applied parallel to the skin surface, and interface pressure results from force applied perpendicular to the skin surface. Interface shear and pressure were measured for 21 commercial wheelchair seat cushions using a loading system. Cushions made with viscous fluid had the lowest interface shear stress, and cushions made with air cells had the lowest interface pressure.
Volume 48 Number 3, 2011
Pages 225 — 234
Last Reviewed or Updated Tuesday, March 22, 2011 11:22 AM