Engineering the perfect mattress: The influence of substrate mechanics on deep tissue stresses in supine
Rayward, Lionel, Pearcy, Mark, Kerr, Graham, Pivonka, Peter, & Little, J. Paige (2023) Engineering the perfect mattress: The influence of substrate mechanics on deep tissue stresses in supine. Clinical Biomechanics, 110, Article number: 106130.
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Description
Background: With increasing global interest in sleep hygiene, sleep ergonomics is an area that has been largely understudied. During sleep individuals turn over during the night to restore blood flow in occluded blood vessels, indicating that control of local tissue pressure may play a role in improving sleep comfort. This study investigates the influence of mattress stiffness on tissue compressive stresses during supine lying. Methods: A subject-specific 3D finite element (FE) model of the pelvis area has been developed to simulate supine lying on substrates of varying firmness. Constitutive parameters for the adipose-skin tissue and muscle-organ tissue were calibrated using a novel application of the inverse finite element method. Findings: The compressive stress was consistently greatest in the muscle interfacing the sacrum at 18.5 kPa on the soft foam, and 30.9 kPa on the firm foam. From soft to firm, the compressive stress increased by 67% at the sacrum, 20% at the ischium, 42% at the lesser trochanter, and 50% at the skin. Interpretation: The non-linearity of the foam substrate had a pressure distributing effect, relieving the peak compressive stresses at the sacrum, indicating that it may be possible to design arrays of foam substrates that can provide most efficient pressure relief.
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ID Code: | 244301 | ||||||||
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Item Type: | Contribution to Journal (Journal Article) | ||||||||
Refereed: | Yes | ||||||||
ORCID iD: |
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Additional Information: | Funding Information: The authors acknowledge the research support provide by Daniel Green, Sealy Australia. This support has provided: • PhD scholarship for Mr. Lionel Rayward • Research datasets for healthy adults (including MRI, 3D surface scan and Pressure mapping data, foam compression test data). | ||||||||
Measurements or Duration: | 9 pages | ||||||||
Keywords: | Finite element, Ogden, Pelvis, Soft tissues, Supine position, Tissue mechanics | ||||||||
DOI: | 10.1016/j.clinbiomech.2023.106130 | ||||||||
ISSN: | 0268-0033 | ||||||||
Pure ID: | 149540486 | ||||||||
Divisions: | Current > Research Centres > Centre for Biomedical Technologies Current > QUT Faculties and Divisions > Faculty of Engineering Current > Schools > School of Mechanical, Medical & Process Engineering Current > QUT Faculties and Divisions > Faculty of Health Current > Schools > School of Exercise & Nutrition Sciences |
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Funding Information: | The authors acknowledge the research support provide by Daniel Green, Sealy Australia. This support has provided: • PhD scholarship for Mr. Lionel Rayward • Research datasets for healthy adults (including MRI, 3D surface scan and Pressure mapping data, foam compression test data) | ||||||||
Copyright Owner: | 2023 The Authors | ||||||||
Copyright Statement: | This work is covered by copyright. Unless the document is being made available under a Creative Commons Licence, you must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a Creative Commons License (or other specified license) then refer to the Licence for details of permitted re-use. It is a condition of access that users recognise and abide by the legal requirements associated with these rights. If you believe that this work infringes copyright please provide details by email to qut.copyright@qut.edu.au | ||||||||
Deposited On: | 07 Nov 2023 03:21 | ||||||||
Last Modified: | 09 Feb 2025 23:00 |
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