Finite element modelling of stapled colorectal end-to-end anastomosis: Advantages of variable height stapler design

Nováček, Vít; Tran, Thanh Ngoc; Klinge, U.; Tolba, R. H.; Staat, Manfred; Bronson, Dwight G.; Miesse, Andrew; Whiffen, J.; Turquier, F.

doi:10.1016/j.jbiomech.2012.07.021

Cited by 17 publications

(19 citation statements)

References 33 publications

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“…By providing varied staple heights within the same firing, there is reportedly less stress on the tissue along the outer staple line. 51,52 Ethicon-Endo Surgery, Inc. (Cincinnati, OH) has recently introduced the EES Linear Cutter™, which employs a novel 3D staple using a single cartridge containing 3 different staple heights, enabling the surgeon to select staple height without switching cartridges. A literature search of this method produced a single study that reported that the stapler was as safe as a standard linear cutter and produced less bleeding along the anastomosis in people.…”

Section: Discussionmentioning

confidence: 99%

Risk Factors for Dehiscence of Stapled Functional End‐to‐End Intestinal Anastomoses in Dogs: 53 Cases (2001–2012)

2015

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Section: Discussionmentioning

confidence: 99%

Risk Factors for Dehiscence of Stapled Functional End‐to‐End Intestinal Anastomoses in Dogs: 53 Cases (2001–2012)

2015

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“…; Nováček et al . ). The development of such computational models requires the definition of constitutive formulations of the biological tissues (Maurel et al .…”

Section: Introductionmentioning

confidence: 97%

Characterization of the anisotropic mechanical behaviour of colonic tissues: experimental activity and constitutive formulation

Carniel¹,

Gramigna

Fontanella³

et al. 2014

Experimental Physiology

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New Findings r What is the central question of this study?The wall of the colon shows an anisotropic and non-linear mechanical response, because of the distribution and mechanical properties of sub-components. This study aimed to provide, by a coupled experimental and computational approach, a constitutive framework to interpret the mechanics of colonic tissues. r What is the main finding and its importance?Tensile tests on tissue samples from pig colon were developed. The experimental data were processed to define proper constitutive formulations. Constitutive parameters were identified by the inverse analysis of experimental tests. The reliability of parameters was assessed by agreement between the experimental and model results and the satisfaction of material thermomechanics principles. The developed constitutive framework is capable of interpreting the general anisotropic and non-linear mechanical behaviour of colonic tissues.The aim was to investigate the biomechanical behaviour of colonic tissues by a coupled experimental and numerical approach. The wall of the colon is composed of different tissue layers. Within each layer, different fibre families are distributed according to specific spatial orientations, which lead to a strongly anisotropic configuration. Accounting for the complex histology of the tissues, mechanical tests must be planned and designed to evaluate the behaviour of the colonic wall in different directions. Uni-axial tensile tests were performed on tissue specimens from 15 fresh pig colons, accounting for six different loading directions (five specimens for each loading direction). The next step of the investigation was to define an appropriate constitutive framework and develop a procedure for identification of the constitutive parameters. A specific hyperelastic formulation was developed that accounted for the multilayered conformation of the colonic wall and the fibre-reinforced configuration of the tissues. The parameters were identified by inverse analyses of the mechanical tests. The comparison of model results with experimental data, together with the evaluation of satisfaction of material thermomechanics principles, confirmed the reliability of the analysis developed. This work forms the basis for more comprehensive activities that aim to provide computational tools for the interpretation of surgical procedures that involve the gastrointestinal tract, considering the specific biomedical devices adopted.

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“…Many techniques have been provided for colon screening and surgery, aiming at the less invasive action . The design of surgical procedures and devices, together with prosthetic elements and biomaterials, is correlated with the analysis of the tissues and the organs functionality from a biomechanical point of view . Numerical models can be used to interpret the actual configuration and mechanical behavior of colon structures and tissues .…”

Section: Introductionmentioning

confidence: 99%

Constitutive formulations for the mechanical investigation of colonic tissues

Carniel

Gramigna

Fontanella

et al. 2013

J Biomedical Materials Res

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A constitutive framework is provided for the characterization of the mechanical behavior of colonic tissues, as a fundamental tool for the development of numerical models of the colonic structures. The constitutive analysis is performed by a multidisciplinary approach that requires the cooperation between experimental and computational competences. The preliminary investigation pertains to the review of the tissues histology. The complex structural configuration of the tissues and the specific distributions of fibrous elements entail the nonlinear mechanical behavior and the anisotropic response. The identification of the mechanical properties requires to perform mechanical tests according to different loading situations, as different loading directions. Because of the typical functionality of colon structures, the tissues mechanics is investigated by tensile tests, which are performed on taenia coli and haustra specimens from fresh pig colons. Accounting for the histological investigation and the results from the mechanical tests, a specific hyperelastic framework is provided within the theory of fiber-reinforced composite materials. Preliminary analytical formulations are defined to identify the constitutive parameters by the inverse analysis of the experimental tests. Finite element models of the specimens are developed accounting for the actual configuration of the colon structures to verify the quality of the results. The good agreement between experimental and numerical model results suggests the reliability of the constitutive formulations and parameters. Finally, the developed constitutive analysis makes it possible to identify the mechanical behavior and properties of the different colonic tissues.

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Finite element modelling of stapled colorectal end-to-end anastomosis: Advantages of variable height stapler design

Cited by 17 publications

References 33 publications

Risk Factors for Dehiscence of Stapled Functional End‐to‐End Intestinal Anastomoses in Dogs: 53 Cases (2001–2012)

Risk Factors for Dehiscence of Stapled Functional End‐to‐End Intestinal Anastomoses in Dogs: 53 Cases (2001–2012)

Characterization of the anisotropic mechanical behaviour of colonic tissues: experimental activity and constitutive formulation

Constitutive formulations for the mechanical investigation of colonic tissues

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