Luboz V, Bailet M, Boichon Grivot C, Rochette M, Diot B, Bucki M, Payan Y, et al.
Journal of tissue viability. Date of publication 2018 Feb 1;volume 27(1):54-58.
1. J Tissue Viability. 2018 Feb;27(1):54-58. doi: 10.1016/j.jtv.2017.06.002. Epub
2017 Jun 15.
Personalized modeling for real-time pressure ulcer prevention in sitting posture.
Luboz V(1), Bailet M(2), Boichon Grivot C(3), Rochette M(4), Diot B(5), Bucki
M(6), Payan Y(7).
Author information:
(1)TexiSense, Montceau-les-Mines, France. Electronic address:
vincent.luboz@texisense.com.
(2)UJF-Grenoble1/CNRS/TIMC-IMAG UMR 5525, Grenoble, F-38041, France. Electronic
address: Mathieu.Bailet@univ-grenoble-alpes.fr.
(3)ANSYS, Lyon, France. Electronic address: christelle.boichon@ansys.com.
(4)ANSYS, Lyon, France. Electronic address: michel.rochette@ansys.com.
(5)IDS, Montceau-les-Mines, France. Electronic address:
b.diot@ids-assistance.com.
(6)TexiSense, Montceau-les-Mines, France. Electronic address:
marek.bucki@texisense.com.
(7)UJF-Grenoble1/CNRS/TIMC-IMAG UMR 5525, Grenoble, F-38041, France. Electronic
address: Yohan.Payan@univ-grenoble-alpes.fr.
Ischial pressure ulcer is an important risk for every paraplegic person and a
major public health issue. Pressure ulcers appear following excessive compression
of buttock's soft tissues by bony structures, and particularly in ischial and
sacral bones. Current prevention techniques are mainly based on daily skin
inspection to spot red patches or injuries. Nevertheless, most pressure ulcers
occur internally and are difficult to detect early. Estimating internal strains
within soft tissues could help to evaluate the risk of pressure ulcer. A
subject-specific biomechanical model could be used to assess internal strains
from measured skin surface pressures. However, a realistic 3D non-linear Finite
Element buttock model, with different layers of tissue materials for skin, fat
and muscles, requires somewhere between minutes and hours to compute, therefore
forbidding its use in a real-time daily prevention context. In this article, we
propose to optimize these computations by using a reduced order modeling
technique (ROM) based on proper orthogonal decompositions of the pressure and
strain fields coupled with a machine learning method. ROM allows strains to be
evaluated inside the model interactively (i.e. in less than a second) for any
pressure field measured below the buttocks. In our case, with only 19 modes of
variation of pressure patterns, an error divergence of one percent is observed
compared to the full scale simulation for evaluating the strain field. This
reduced model could therefore be the first step towards interactive pressure
ulcer prevention in a daily set-up.
Copyright © 2017 Tissue Viability Society. Published by Elsevier Ltd. All rights
reserved.
DOI: 10.1016/j.jtv.2017.06.002
PMID: 28637592 [Indexed for MEDLINE]
