Hysteresis

This article relates to ISO 16840-2:2018, Clause 14

Graphic provided by the University of Pittsburgh Wheelchair and Cushion Standards Group

Learn more about this test:

Video

Hysteresis Overview

Sample Data

Hysteresis (wheelchairstandards.com)

Other physical and mechanical characteristics of seat cushions

Make sure to learn about the following physical and mechanical characteristics of seat cushions intended to manage tissue integrity:

Related Literature

International Organization for Standardization. ISO 16840-2: Wheelchair seating — Part 2: Determination of physical and mechanical characteristics of devices intended to manage tissue integrity – Seat cushions. Geneva, Switzerland; 2018.

Hillman SJ, Hollington J, Crossan N, Torres-Sánchez C. Correlation of ISO 16840-2: 2007 impact damping and hysteresis measures for a sample of wheelchair seating cushions. Assistive Technology. 2018 Mar 15;30(2):77-83. doi:10.1080/10400435.2016.1261963

Hollington J, Hillman SJ, Torres-Sánchez C, Boeckx J, Crossan N. ISO 16840- 2:2007 load deflection and hysteresis measurements for a sample of wheelchair seating cushions. Med Eng Phys. 2014; 36(4), 509-515. doi:10.1016/j.medengphy.2013.10.010.

Manko A, Karg P, Brienza D, Delazio A. Effects of simulated aging on cushion performance related to hysteresis. In: Proceedings of the RESNA International Conference on Technology and Disability. Arlington, VA: RESNA Press; 2021.

Kalliat K, Karg P, Brienza D, Arias-Guzman S, Freedman J, Delazio A. Relationship between impact damping and hysteresis wheelchair cushion performance test results. In: Proceedings of the RESNA 42nd International Conference on Technology and Disability; Toronto, Canada. Arlington, VA: RESNA Press; 2019.

Wheelchair & Cushion Performance Testing Standards – Guidance on interpretation of performance standards for wheelchair seat cushions. https://www.wheelchairstandards.pitt.edu/sites/default/files/fact-sheets/cpig_tabular.pdf.

Wheelchair & Cushion Performance Testing Standards – Interpreting wheelchair seat cushion performance standards.  https://www.wheelchairstandards.pitt.edu/sites/default/files/fact-sheets/cpig_with_pictures.pdf.

 

Acknowledgements

We would like to thank the University of Pittsburgh Wheelchair and Cushion Standards Group for the contribution on this topic.

Was this article helpful?
Dislike