On the importance of 3D, geometrically accurate, and subject-specific finite element analysis for evaluation of in-vivo soft tissue loads

Pressure ulcers are a type of local soft tissue injury due to sustained mechanical loading and remain a common issue in patient care. People with spinal cord injury (SCI) are especially at risk of pressure ulcers due to impaired mobility and sensory perception. The development of load improving supp...

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Published inComputer methods in biomechanics and biomedical engineering Vol. 20; no. 5; pp. 483 - 491
Main Authors Moerman, Kevin M., van Vijven, Marc, Solis, Leandro R., van Haaften, Eline E., Loenen, Arjan C. Y., Mushahwar, Vivian K., Oomens, Cees W. J.
Format Journal Article
LanguageEnglish
Published England Taylor & Francis 04.04.2017
Taylor & Francis Ltd
Subjects
Adult
Compressive Strength
Deformation effects
Female
Finite Element Analysis
Finite element method
geometry
Humans
image-based modelling
Imaging, Three-Dimensional
Loads (forces)
Magnetic Resonance Imaging
Male
Mathematical analysis
Mathematical models
Mechanical loading
Mechanical properties
Middle Aged
Pressure
pressure ulcer
Pressure ulcers
Sensory perception
soft tissue
Soft Tissue Injuries - physiopathology
Spinal cord injuries
Spinal Cord Injuries - physiopathology
Stress, Mechanical
Ulcers
Weight-Bearing
Young Adult
geometry
soft tissue
Finite element analysis
image-based modelling
pressure ulcer
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Summary:Pressure ulcers are a type of local soft tissue injury due to sustained mechanical loading and remain a common issue in patient care. People with spinal cord injury (SCI) are especially at risk of pressure ulcers due to impaired mobility and sensory perception. The development of load improving support structures relies on realistic tissue load evaluation e.g. using finite element analysis (FEA). FEA requires realistic subject-specific mechanical properties and geometries. This study focuses on the effect of geometry. MRI is used for the creation of geometrically accurate models of the human buttock for three able-bodied volunteers and three volunteers with SCI. The effect of geometry on observed internal tissue deformations for each subject is studied by comparing FEA findings for equivalent loading conditions. The large variations found between subjects confirms the importance of subject-specific FEA.
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ISSN:1025-5842
1476-8259
DOI:10.1080/10255842.2016.1250259