ISS 2017 Program


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PO1.7: Innovative New Custom Seat Design; Clinical Case Examples

Pressure, friction, shear, and microclimate are known to be extrinsic factors contributing to the development of skin and tissue trauma. A strap-based custom wheelchair seat cushion designed to address pressure, friction, shear, and microclimate simultaneously has been used by this author, a private practice complex rehab provider and ATP. This presentation describes this new design, the molding process, from the supplier / clinician perspective, and shares multiple case examples showing its effectiveness and capability.
This session is supported by a company with reported interest in the sale of Assistive Technology products. The content has been reviewed by ISS personnel and determined to be appropriate for continuing education purposes.


Learning Objectives:

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



Leisa A. Lang, OTA, ATP
Reliable Medical Supply, Inc.
Brooklyn Park, Minnesota
United States

Leisa Lang, OTA/ATP
Leisa began work in Occupational Therapy in 1991 focusing on seating and positioning and neuromuscular rehabilitation. She began working directly in the Assisted Technology industry in 1999 and continues to work as an ATP and Clinical Supervisor for Reliable Medical in Brooklyn Park MN. She has a passion for complex medical patients and the challenges they present.


Mark J Payette, CO, ATP
Tamarack Habilitation Technologies, Inc.
Blaine, Minnesota
United States

Mark is a certified Orthotist and ATP with 24 years of direct patient care experience providing custom orthotic seating services for children at Gillette Children's Hospital, and then in private practice for children and adults, with Tamarack Habilitation Technologies, Inc. Following that, he has been working in product development for 13 years at Tamarack, focusing on developing friction management and custom wheelchair seat surface technologies. His experience includes presenting lectures and workshops at the local, national and international levels.



    1. Ferguson, J., Wittig, B., Payette, M., Goldish, G., & Hansen, A. (2014). Pilot study of a strap-based custom wheelchair seating system in persons with spinal cord injury. JRRD, 51(8).
    2. Carlson, J.M., Payette, M., & Vervena, L. (1995). Seating Orthosis Design for Prevention of Decubitus Ulcers. JPO: Journal of Prosthetics and Orthotics 7(2).
    3. International Review (2010). Pressure ulcer prevention: pressure, shear, friction and microclimate in context. A consensus document. London: Wounds International.

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