ISS 2017 Program


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PS6.3: How a Cushion Can Effectively Protect Against Pressure Injury

This talk discusses the fundamental considerations in making an adequate selection of a cushion for either wheelchair users or chronic sitting needs. Using MRI coupled with finite element computer modeling, sufficient immersion and envelopment of the body, as well as adjustability and adaptability were identified as key factors, which together represent the potential cushioning performance through minimization of internal tissue deformations, strains and stresses.


Learning Objectives:

Upon completion of this session, attendees will be able to;



Amit Gefen, PhD
Tel Aviv University
Tel Aviv

Prof. Amit Gefen received the B.Sc. in Mechanical Engineering and M.Sc. and Ph.D. in Biomedical Engineering from Tel Aviv University in 1994, 1997, and 2001, respectively. During 2002-2003 he was a post-doctoral fellow at the University of Pennsylvania. He is currently a Full Professor at the Faculty of Engineering of Tel Aviv University. His research interests are in studying effects of biomechanical factors on cells, tissues and organs, with applications to chronic wounds.

Kara Kopplin
Belleville, IL
United States



    1. Levy, A., Kopplin, K., & Gefen, A. (2014). An Air-cell-based cushion for pressure ulcer protection remarkably reduces tissue stresses in the seated buttocks with respect to foams: Finite element studies. Journal of Tissue Viability. 23(1), 13-23.
    2. Shoham, N., Levy, A., Kopplin, K. & Gefen, A. (2015). Contoured foam cushions cannot provide long-term protection against pressure ulcers for individuals with a spinal cord injury: Modeling studies. Adv Skin Wound Care. 28(7), 303-316.
    3. Levy, A., Kopplin, K. & Gefen, A. (2016). A computer modeling study to evaluate the potential effect of air cell-based cushions on the tissues of bariatric and diabetic patients. Ostomy Wound Manage. 62(1), 22-30.

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