Pressure Ulcer Prevention for Wheelchair Users: Cushion Design and Selection
From: Medical Design Technology - 09/22/2014

As deadly as pressure ulcers can be, it is remarkable how poorly they have
been understood and how common they remain. But some groundbreaking research
coming out of the laboratory of Dr. Amit Gefen at Tel Aviv University in
Israel is changing that.

Dr. Gefen, a PhD in biomedical engineering, whose lab has done
industry-changing work over the last decade in the etiology of pressure
ulcers, in coordination with other leading scientists around the world. The
work has provided a much better understanding of a particularly dangerous and
difficult-to-detect kind of pressure ulcer - the kind caused by deep tissue
injury, or DTI. The key insight: these injuries are caused primarily by
tissue and cell deformation, not ischemia. Ischemia, or lack of blood flow,
acts as a secondary factor, rather than a primary cause.

Read the entire article at:
http://www.mdtmag.com/articles/2014/09/pressure-ulcer-prevention-wheelchair-users-cushion-design-and-selection

Links:
Amit Gefen
http://www.eng.tau.ac.il/~gefen/
http://www.eng.tau.ac.il/~msbm/

An air-cell-based cushion for pressure ulcer protection remarkably reduces
  tissue stresses in the seated buttocks with respect to foams: Finite
  element studies 
http://www.journaloftissueviability.com/article/S0965-206X(13)00088-0/pdf