Biomechanical Characterization of Material Properties of Porcine Liver After Thermal Treatment

Wex, Cora; Arndt, Stephanie; Brandstädter, K.; Herrmann, Leonard R.; Bruns, Christiane

doi:10.1080/1539445x.2014.936559

Cited by 6 publications

(2 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Material parameters are not always similar for the same tissues and tests reported by different research groups. This may be because of different samples, different conditions of specimen preparation including preservation time [64,117], temperature [116,118] and others. No doubt, parameters obtained from ex vivo and in vivo experiments are very different from each other.…”

Section: Name Of the Model Strain Energy Function The Piola-kirchhoffmentioning

confidence: 99%

Isotropic incompressible hyperelastic models for modelling the mechanical behaviour of biological tissues: a review

Wex

Arndt

Stoll

et al. 2015

Biomedical Engineering / Biomedizinische Technik

View full text Add to dashboard Cite

Modelling the mechanical behaviour of biological tissues is of vital importance for clinical applications. It is necessary for surgery simulation, tissue engineering, finite element modelling of soft tissues, etc. The theory of linear elasticity is frequently used to characterise biological tissues; however, the theory of nonlinear elasticity using hyperelastic models, describes accurately the nonlinear tissue response under large strains. The aim of this study is to provide a review of constitutive equations based on the continuum mechanics approach for modelling the rate-independent mechanical behaviour of homogeneous, isotropic and incompressible biological materials. The hyperelastic approach postulates an existence of the strain energy function--a scalar function per unit reference volume, which relates the displacement of the tissue to their corresponding stress values. The most popular form of the strain energy functions as Neo-Hookean, Mooney-Rivlin, Ogden, Yeoh, Fung-Demiray, Veronda-Westmann, Arruda-Boyce, Gent and their modifications are described and discussed considering their ability to analytically characterise the mechanical behaviour of biological tissues. The review provides a complete and detailed analysis of the strain energy functions used for modelling the rate-independent mechanical behaviour of soft biological tissues such as liver, kidney, spleen, brain, breast, etc.

show abstract

Section: Name Of the Model Strain Energy Function The Piola-kirchhoffmentioning

confidence: 99%

Isotropic incompressible hyperelastic models for modelling the mechanical behaviour of biological tissues: a review

Wex

Arndt

Stoll

et al. 2015

Biomedical Engineering / Biomedizinische Technik

View full text Add to dashboard Cite

show abstract

“…The sapphire needle was combined with the common type of silica fiber (NA = 0.22). Selection of porcine liver for the experimental characterization of the sapphire needle was due to the widely applied methods of LTT for treatment of liver cancer and its metastatic disease [38,[43][44][45][46], and due to the similarities of this tissue to human livers in structure, anatomy, size, function and mechanical behavior [47,48].…”

Section: Experimental Study Of Tissue Coagulation Ex Vivomentioning

confidence: 99%

Microfocusing sapphire capillary needle for laser surgery and therapy: Fabrication and characterization

Dolganova

Shikunova

Zotov

et al. 2020

Journal of Biophotonics

View full text Add to dashboard Cite

A sapphire shaped capillary needle designed for collimating and focusing of laser radiation was proposed and fabricated by the edge-defined film-fed growth technique. It features an as-grown surface quality, high transparency for visible and near-infrared radiation, high thermal and chemical resistance and the complex shape of the tip, which protects silica fibers. The needle's geometrical parameters can be adjusted for use in various situations, such as type of tissue, modality of therapy and treatment protocol. The focusing effect was demonstrated numerically and observed experimentally during coagulation of the ex vivo porcine liver samples. This needle in combination with 0.22NA optical fiber allows intensive and uniform coagulation of 150 mm 3 volume interstitially and 30 mm 3 superficially by laser exposure with 280 J without tissue carbonization and fiber damaging along with delicate treatment of small areas. The demonstrated results reveal the perspectives of the proposed sapphire microfocusing needle for laser surgery and therapy.

show abstract

The differences in measured prostate material properties between probing and unconfined compression testing methods

Johnson

Campbell²,

Campbell-Kyureghyan

2020

Medical Engineering & Physics

View full text Add to dashboard Cite

Biomechanical Characterization of Material Properties of Porcine Liver After Thermal Treatment

Cited by 6 publications

References 32 publications

Isotropic incompressible hyperelastic models for modelling the mechanical behaviour of biological tissues: a review

Isotropic incompressible hyperelastic models for modelling the mechanical behaviour of biological tissues: a review

Microfocusing sapphire capillary needle for laser surgery and therapy: Fabrication and characterization

The differences in measured prostate material properties between probing and unconfined compression testing methods

Contact Info

Product

Resources

About