This Education in Motion resource is also available as a printable PDF.
When recommending a seating system, one should consider the shape of the seating system and how the shape of the cushion or back will impact the individual's positioning. The spine and pelvis can be supported by more than five different shapes and, if not fitted correctly, will create postural instability. The pelvis and lower extremities can be supported by more than four different shapes that will affect stability. It is important to consider these shapes when accommodating or correcting orthopedic asymmetries. The seating shape may also determine the method of pressure distribution. Lastly, the shape may affect the overall comfort of the individual sitting in the seating system.
The following resource provides a visual for the most common shapes and contours of a seating system, and what the outcomes may be if they are not properly fitted.
Consider protecting the trochanters via offloading or immersion/envelopment.
Trochanters not supported may cause:
Buttocks should be supported while loading femurs for stability. Ischial Tuberosities (ITs) need to be protected during activity.
The buttocks should be supported while maintaining optimal hip angle. Correct height depends on difference in height between ischials and posterior aspect of femur.
Femoral loading stabilizes the pelvis, positions the lower extremities, and redistributes pressure.
DISCLAIMER: FOR PROFESSIONAL USE ONLY. THIS WEBSITE (AND THE DOCUMENTS REFERENCED HEREIN) DO NOT PROVIDE MEDICAL ADVICE. Sunrise Medical (CA) LLC ("Sunrise") does not provide clinician services. The information contained on this website (and the documents referenced herein), including, but not limited to, the text, graphics, images, and descriptions, are for informational purposes only and should be utilized as a general resource for clinicians and suppliers to then use clinical reasoning skills to determine optimal seating and mobility solutions for individual patients. No material on this website (or any document referenced herein) is intended to be used as (or a substitute for) professional medical advice, diagnosis or treatment. Never disregard your professional medical training when providing medical advice or treatment because of something you have read on this website (or any document referenced herein). Clinicians should review this (and any other materials) carefully and confirm information contained herein with other sources. Reliance on this website (and the information contained herein) is solely at your own risk.
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