Is a simplified Finite Element model of the gluteus region able to capture the mechanical response of the internal soft tissues under compression?
Article dans une revue avec comité de lecture
Internal soft tissue strains have been shown to be one of the main factors responsible for the onset of Pressure Ulcers and to be representative of its risk of development. However, the estimation of this parameter using Finite Element (FE) analysis in clinical setups is currently hindered by costly acquisition, reconstruction and computation times. Ultrasound (US) imaging is a promising candidate for the clinical assessment of both morphological and material parameters. Method: The aim of this study was to investigate the ability of a local FE model of the region beneath the ischium with a limited number of parameters to capture the internal response of the gluteus region predicted by a complete 3D FE model. 26 local FE models were developed, and their predictions were compared to those of the patient-specific reference FE models in sitting position. Findings: A high correlation was observed (R = 0.90, p-value < 0.01). A sensitivity analysis showed that the most influent parameters were the mechanical behaviour of the muscle tissues, the ischium morphology and the external mechanical loading. Interpretation: Given the progress of US for capturing both morphological and material parameters, these results are promising because they open up the possibility to use personalised simplified FE models for risk estimation in daily clinical routine.
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Development and evaluation of a new methodology for the fast generation of patient-specific Finite Element models of the buttock for sitting-acquired deep tissue injury prevention Article dans une revue avec comité de lectureMACRON, Aurélien; PILLET, Hélène; DORIDAM, Jennifer; VERNEY, Alexandre; ROHAN, Pierre-Yves (Elsevier, 2018)The occurrence and management of Pressure Ulcers remain a major issue for patients with reduced mobility and neurosensory loss despite significant improvement in the prevention methods. These injuries are caused by biological ...
What is the influence of using generic material properties on the estimation of the pelvis sagging when sitting from a Finite Element model of the buttock region? Communication sans acteROHAN, Pierre-Yves; MACRON, Aurélien; DORIDAM, Jennifer; VERNEY, Alexandre; PILLET, Hélène (2018)Ischial pressure sores are painful, slow healing wounds that develop during prolonged sitting. Its formation is associated with the high internal strains induced by the compression of the soft tissues under the ischium ...
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