title: An alternating pressure sequence proposal for an air-cell cushion for preventing pressure ulcers.
abstract: The distribution and release of pressure on ischial regions are two important parameters for evaluating the effectiveness of a cushion; especially the release of pressure over time on ischial tuberosities, which is significant for preventing pressure ulcers. The aim of this work is to evaluate the effect on interface pressure through the application of a proposed alternating pressure sequence for an air-cell cushion. Six healthy volunteers were asked to sit on the air cell cushion, in static and alternating modes, as well as on a typical foam cushion for 12 minutes. Interface pressure was monitored with a matrix sensor system. Interface pressure values on ischial tuberosities, user contact area and pressure distribution were analyzed. Results showed that IP on IT tends to increase in both foam and static cushions, while in alternating cushion IP on IT tends to decrease. User contact area was significantly larger in alternating cushion than in static or foam cushions. Moreover, there is a better pressure re-distribution with alternating cushion than with the other cushions. The goal of the alternating sequence is to redistribute pressure and stimulate the ischial regions in order to promote blood flow and prevent pressure occurring in wheelchair users.
authors.forename: Sandra
authors.initials: S
authors.lastname: Arias
authors.forename: Eladio
authors.initials: E
authors.lastname: Cardiel
authors.forename: Pablo
authors.initials: P
authors.lastname: Rogeli
authors.forename: Taketoshi
authors.initials: T
authors.lastname: Mori
authors.forename: Gojiro
authors.initials: G
authors.lastname: Nakagami
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Noguchi
authors.forename: Hiromi
authors.initials: H
authors.lastname: Sanada
mesh_terms: D000328:Adult; D000388:Air; D005260:Female; D006801:Humans; D008297:Male; D010384:Pelvic Bones / Q000503:physiopathology; D011187:Posture; D011312:Pressure; D003668:Pressure Ulcer / Q000517:prevention & control*