CONTOURED, REINFORCED AND ADJUSTABLE SEAT CUSHION AND METHOD FOR OFFLOADING PRESSURE FROM SKELETAL BONE PROMINENCES AND ENCOURAGING PROPER POSTURAL ALIGNMENT

摘要

A support contour of a cushion, such as a wheelchair cushion, defines relief areas at locations adjacent to skin covering the ischial tuberosities, the greater trochanters and the coccyx and sacrum of a person sitting on the support contour. Support areas of the support contour transfer force into the pelvic area adjacent to skin covering tissue masses on opposite lateral sides of the posterior buttocks and beneath the proximal thighs of the person. Risks of pressure ulcers from pressure and shear forces on bony prominences is reduced while providing support at the broader areas without bony prominences in such a manner to encourage postural alignment. A support member attached to a rear corner of the cushion is retained to resist deformation of the support contour from contact with the person and to adjust the support contour for better support of the pelvic area.