A novel in vivo approach to assess strains of the human abdominal wall under known intraabdominal pressure.

Autor: Lubowiecka I; Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland., Szepietowska K; Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland. Electronic address: katszepi@pg.edu.pl., Tomaszewska A; Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Gdańsk, Poland., Bielski PM; Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gdańsk, Poland., Chmielewski M; Department of Nephrology, Transplantology and Internal Medicine, Medical University of Gdańsk, Gdańsk, Poland., Lichodziejewska-Niemierko M; Department of Nephrology, Transplantology and Internal Medicine, Medical University of Gdańsk, Gdańsk, Poland., Szymczak C; Faculty of Mechanical Engineering and Ship Technology, Gdańsk University of Technology, Gdańsk, Poland.
Jazyk: angličtina
Zdroj: Journal of the mechanical behavior of biomedical materials [J Mech Behav Biomed Mater] 2022 Jan; Vol. 125, pp. 104902. Date of Electronic Publication: 2021 Oct 23.
DOI: 10.1016/j.jmbbm.2021.104902
Abstrakt: The study concerns mechanical behaviour of a living human abdominal wall. A better mechanical understanding of a human abdominal wall and recognition of its material properties is required to find mechanically compatible surgical meshes to significantly improve the treatment of ventral hernias. A non-invasive methodology, based on in vivo optical measurements is proposed to determine strains of abdominal wall corresponding to a known intraabdominal pressure. The measurement is performed in the course of a standard procedure of peritoneal dialysis. A dedicated experimental stand is designed for the experiment. The photogrammetric technique is employed to recover the three-dimensional surface geometry of the anterior abdominal wall at the initial and terminal instants of the dialysis. This corresponds to two deformation states, before and after filling the abdominal cavity with dialysis fluid. The study provides information on strain fields of living human abdominal wall. The inquiry is aimed at principal strains and their directions, observed at the level from -10% to 17%. The intraabdominal pressure related to the amount of introduced dialysis fluid measured within the medical procedure covers the range 11-18.5 cmH 2 O. The methodology leads to the deformation state of the abdominal wall according to the corresponding loading conditions. Therefore, the study is a step towards an identification of mechanical properties of living human abdominal wall.
(Copyright © 2021 The Authors. Published by Elsevier Ltd.. All rights reserved.)
Databáze: MEDLINE
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