Mechanical Properties of the Human Stomach under Uniaxial Stress Action

Rotta, Grzegorz; Grymek, Szymon; Karczewska, Magdalena

doi:10.18520/cs/v116/i11/1886-1893

Cited by 11 publications

(7 citation statements)

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“…Bauer and co-authors, published data consistent with our findings (Bauer et al, 2020). Multiple other studies examining porcine or human gastric tissue have, in contrast to the present study, found that longitudinal samples were stiffer in all regions (Egorov et al, 2002;Jia et al, 2015;Rotta et al, 2019;Zhao et al, 2008Zhao et al, , 2005, and finally, findings by Carniel and co-authors showed that corpus were stiffer the longitudinal direction, whereas in the circumferential direction fundus showed higher stiffness (Carniel et al, 2020).…”

Section: Direction Dependencysupporting

confidence: 89%

“…The stomach is known to exhibit nonlinear, anisotropic and viscoelastic properties (Gregersen, 2003;Miftahof, 2017). The anisotropic and nonlinear elastic behavior has been examined by quasi-static tests on animal or human gastric tissue (Aydin et al, 2017;Bauer et al, 2020;Carniel et al, 2020;Egorov et al, 2002;Jia et al, 2015;Rotta et al, 2019;Toniolo et al, 2022;Yamada, 1970;Zhao et al, 2008Zhao et al, , 2005. These studies demonstrated that gastric tissue behaves anisotropically, i. e. with stiffness dependent on location and direction, and that the timeindependent elastic behavior can be modelled as hyperelastic.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic viscoelastic properties of porcine gastric tissue: Effects of loading frequency, region and direction

Julie

Strøm

Mette

et al. 2022

Journal of Biomechanics

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Section: Direction Dependencysupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Dynamic viscoelastic properties of porcine gastric tissue: Effects of loading frequency, region and direction

Julie

Strøm

Mette

et al. 2022

Journal of Biomechanics

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“…We also performed quantitative mechanical testing to evaluate the candidate materials for the gastric phantom, which requires flexibility and durability, with various hardness conditions and the number of silicone coatings. Based on the tensile test results of the previous study, the range of elongation for fundus tissue was 241% (SD: 83%), whereas the range of tensile strength for fundus tissue was 0.23 MPa (SD: 0.06 MPa) 23 . Compared with results for the human stomach, the elongation of the Agilus showed the most similar ranges (0, 2, and 8 silicone coatings: 264, 316, and 343%, respectively), whereas none of the candidate materials demonstrated similar tensile strength ranges.…”

Section: Ap (Mm) Dp (Mm) Mean (Iqr) Mean (Iqr)mentioning

confidence: 96%

“…The thickness of all rubberlike specimens was set to 2.5 mm and a constant extension rate of 50 mm/min was applied until the specimens failed 26 . The mechanical properties including tensile strength (MPa) and elongation (%) were assessed using the tensile test according to references of previous studies that performed tensile tests to demonstrate the mechanical properties of stomach tissues 23,27 .…”

Section: D Printing and Mechanical Evaluationmentioning

confidence: 99%

Modelling and manufacturing of 3D-printed, patient-specific, and anthropomorphic gastric phantoms: a pilot study

Kwon

Choi

Lee³

et al. 2020

Sci Rep

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Interventional devices including intragastric balloons are widely used to treat obesity. This study aims to develop 3D-printed, patient-specific, and anthropomorphic gastric phantoms with mechanical properties similar to those of human stomach. Using computed tomography gastrography (CTG) images of three patients, gastric phantoms were modelled through shape registration to align the stomach shapes of three different phases. Shape accuracies of the original gastric models versus the 3D-printed phantoms were compared using landmark distances. The mechanical properties (elongation and tensile strength), number of silicone coatings (0, 2, and 8 times), and specimen hardness (50, 60, and 70 Shore A) of three materials (Agilus, Elastic, and Flexa) were evaluated. Registration accuracy was significantly lower between the arterial and portal phases (3.16 ± 0.80 mm) than that between the portal and delayed phases (8.92 ± 0.96 mm). The mean shape accuracy difference was less than 10 mm. The mean elongations and tensile strengths of the Agilus, Elastic, and Flexa were 264%, 145%, and 146% and 1.14, 1.59, and 2.15 MPa, respectively, and their mechanical properties differed significantly (all p < 0.05). Elongation and tensile strength assessments, CTG image registration and 3D printing resulted in highly realistic and patient-specific gastric phantoms with reasonable shape accuracies.

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“…The second category involves axial experiments conducted at the tissue scale. Additional local properties can be elucidated through tissue-level experiments conducted on stomach tissue strips using axial stretch [ 15 , 16 , 17 , 18 , 19 , 20 ] and compression [ 21 , 22 ] experiments. The nonlinear, viscoelastic, and anisotropic mechanical characteristics of the stomach tissue can be better elucidated using location-, tissue-level-, and orientation-related experiments.…”

Section: Introductionmentioning

confidence: 99%

Comparison of the Biomechanical Properties between Healthy and Whole Human and Porcine Stomachs

Li,

Liu,

Liu

et al. 2024

Bioengineering

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Gastric cancer poses a societal and economic burden, prompting an exploration into the development of materials suitable for gastric reconstruction. However, there is a dearth of studies on the mechanical properties of porcine and human stomachs. Therefore, this study was conducted to elucidate their mechanical properties, focusing on interspecies correlations. Stress relaxation and tensile tests assessed the hyperelastic and viscoelastic characteristics of porcine and human stomachs. The thickness, stress–strain curve, elastic modulus, and stress relaxation were assessed. Porcine stomachs were significantly thicker than human stomachs. The stiffness contrast between porcine and human stomachs was evident. Porcine stomachs demonstrated varying elastic modulus values, with the highest in the longitudinal mucosa layer of the corpus and the lowest in the longitudinal intact layer of the fundus. In human stomachs, the elastic modulus of the longitudinal muscular layer of the antrum was the highest, whereas that of the circumferential muscularis layer of the corpus was the lowest. The degree of stress relaxation was higher in human stomachs than in porcine stomachs. This study comprehensively elucidated the differences between porcine and human stomachs attributable to variations across different regions and tissue layers, providing essential biomechanical support for subsequent studies in this field.

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Mechanical Properties of the Human Stomach under Uniaxial Stress Action

Cited by 11 publications

References 0 publications

Dynamic viscoelastic properties of porcine gastric tissue: Effects of loading frequency, region and direction

Dynamic viscoelastic properties of porcine gastric tissue: Effects of loading frequency, region and direction

Modelling and manufacturing of 3D-printed, patient-specific, and anthropomorphic gastric phantoms: a pilot study

Comparison of the Biomechanical Properties between Healthy and Whole Human and Porcine Stomachs

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