Visco-elastic mechanical properties of human abdominal fascia

Kirilova, Miglena; Stoytchev, Stoyan; Pashkouleva, Dessislava; Tsenova, V.; Hristoskova, Radka

doi:10.1016/j.jbmt.2008.11.003

Cited by 10 publications

(7 citation statements)

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“…The crisscrossing thick collagen fibers seen in ULA would withstand the changes in the shape of the abdominal wall without the resultant tearing of fibres or stretching of the spaces between the fibres and hence reduce the risk of diastasis recti or ventral hernia formation. Our findings in the baboon LA are consistent with findings of Kirilova et al (2009), who studied the viscoelasticity properties of the human abdominal fascia. They noted that samples cut parallel to the direction of the collagen exhibited 3 times the elastic modulus and had nearly twice the ultimate tensile strength compared to those cut perpendicular to the fibres (Kirilova et al, 2009).…”

Section: Graphicsupporting

confidence: 92%

“…Our findings in the baboon LA are consistent with findings of Kirilova et al (2009), who studied the viscoelasticity properties of the human abdominal fascia. They noted that samples cut parallel to the direction of the collagen exhibited 3 times the elastic modulus and had nearly twice the ultimate tensile strength compared to those cut perpendicular to the fibres (Kirilova et al, 2009). In conclusion, the findings of the study suggest that the baboon ELA and ULA are well organized for withstanding great forces.…”

Section: Graphicsupporting

confidence: 92%

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REGIONAL VARIATION IN THE MICROSCOPY AND TENSILE STRENGTH OF THE LINEA ALBA IN THE BABOON (PAPIO ANUBIS). Variación regional de la microscópia y resistencia a la tracción de la línea alba del babuino (Papio Anubis).

Odula

Kiama

Hassanali

2016

Rev Arg de Anat Clin

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Introducción: La línea alba conecta el rectus abdominis, y por lo tanto su debilitamiento o el aumento de la tension intra-abdominal puede resultar en una diastasis rectal. El objetivo de este estudio es investigar la morfología funcional y la resistencia a la tracción de la línea alba en un primate no humano. Materiales y métodos: Utilizando como puntos de referencia el xifoides, el ombligo y el tubérculo púbico, fueron resecados tejidos de la zonas epigástrica, umbilical e hipogástrica de la línea alba de siete babuinos machos. Estos tejidos se procesaron a través del microscopio y tensiometría. Resultados: La línea alba se compone principalmente de fibras de colágeno organizadas en tres láminas, a saber, superficiales, intermedias y profundas, además de algunas fibras elásticas. La lámina intermedia de la línea alba umbilical se caracterizó por estar formada de grupos compactos y gruesos de colágeno alineados longitudinalmente y oblicuamente que se fusionan en el centro y forman una masa. La fuerza máxima para romper la línea alba durante una tracción longitudinal y oblicua fue de 40 N/mm2 y 63.6 N/mm2 con una tensión de 0.35 y 1.19 respectivamente. El módulo de Young de la línea alba mostró que, la línea alba epigástrica y umbilical tuvo el mayor coeficiente de elasticidad media, de 289 N/mm2 y 328 N/mm2, respectivamente, cuando fueron expuestos a una tracción oblicua. Conclusión: La estructura de la línea alba del babuino está diseñada para soportar grandes tensiones o fuerzas multidireccionales.Introduction: The linea alba connects the rectus abdominis and thus weakening or increased abdominal pressure may result in diastasis recti. The study aims to investigate the functional morphology and the tensile strength of the linea alba in a non-human primate. Materials and Methods: Using the xiphoid process, the umbilicus, and the pubic tubercle as landmarks, tissues were resected from the epigastric, umbilical and hypogastric parts of the linea alba from seven male baboons. The tissues were processed for microscopy and tensiometry. Results: The linea alba was made up of mainly collagen fibres organized into three laminae namely a superficial, intermediate and deep in addition to a few elastic fibres. The intermediate lamina of the umbilical linea alba was characterized by thick compact bundles of longitudinally and obliquely aligned collagen bundles which fused in the midline to form a mass. The maximal/ ultimate stress needed to tear the linea alba during longitudinal and oblique traction was 40 N/mm2 and 63.6 N/mm2 at a strain of 0.35 and 1.19 respectively. The linea alba’s Young’s modulus showed that on average the epigastric and umbilical linea alba had the highest coefficient elasticity at 289 N/mm2 and 328 N/mm2 respectively, when they were exposed to oblique traction. Conclusion: The structure of the baboon linea alba is well organized to withstand strong multidirectional forces.

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Section: Graphicsupporting

confidence: 92%

Section: Graphicsupporting

confidence: 92%

REGIONAL VARIATION IN THE MICROSCOPY AND TENSILE STRENGTH OF THE LINEA ALBA IN THE BABOON (PAPIO ANUBIS). Variación regional de la microscópia y resistencia a la tracción de la línea alba del babuino (Papio Anubis).

Odula

Kiama

Hassanali

2016

Rev Arg de Anat Clin

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“…The first attempts served the field of prediction modelling engineering materials properties were mathematical models that gain acceptance as conducting predictive tools (Agarwal et al, 2014). Mathematical predictive models could be classified into three basic models: deterministic models (Monsia, 2012;Kirlova et al, 2009), stochastic models (Jurgens et al, 2012;Dong et al, 2013) and probabilistic models (Michael and Mital, 1998;Köhler et al, 2007). However, all the previously mentioned models are attempted to solve one-or two-dimensional problem.…”

Section: Related Workmentioning

confidence: 99%

Unsupervised clustering of materials properties using hierarchical techniques

Sobh

Salem

Darwish

et al. 2015

IJCENT

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Data mining (DM) algorithms arose as a promising and flourishing discipline at manufacturing and industrial engineering. This paper proposes an efficient decision support approach for manufacturing engineering. The proposed approach tackles clustering challenges for engineering materials properties. It adopts the hierarchal clustering for mining engineering materials properties. Extensive experiments and comparisons are conducted on three different real-world datasets for engineering materials properties. In addition, a study of different similarity measures is carried out to choose the best fit

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“…The information will be useful for developing accurate biomechanical models of the herniated umbilical fascia, for the validation of finite element models describing its stress-time behavior, and for the design of synthetic fascia substitutes. The author is not aware of any reports on the stress-relaxation results for the human umbilical fascia except those from the author's previous preliminary investigations [13,14]. In view of the scarcity of such experimental data, it was decided to investigate the time-dependent properties of umbilical fascia in more depth using stress-relaxation experiments.…”

Section: Introductionmentioning

confidence: 99%

Time-Dependent Properties of Human Umbilical Fascia

Kirilova

2011

Connective Tissue Research

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This investigation is devoted to the study of the viscoelastic behavior of human abdominal fascia from the umbilical region. Seventeen samples 10 mm wide and up to 70 mm long were cut along the primary fiber direction (group FL) or perpendicular to it (group FT) and subjected to relaxation tests. The viscoelastic response of the tissue at three different strain levels (4%, 5%, and 6%) was investigated. The relaxation curves were fitted using a two-stage decaying exponential form. The following parameters were determined: initial stress σ(0), relaxation times τ(1) and τ(2), stress reduction Δσ, initial relaxation modulus E and equilibrium relaxation modulus E(eq), as well as the ratio E/E(eq). Fiber orientation and strain levels were varied to determine their influence on the viscoelastic properties of fascia. The results highlight the inherent viscoelastic mechanical properties of umbilical fascia. The values of the viscoelastic parameters determined for the longitudinal and transverse directions varied markedly. Significant differences were found between the two groups FL and FT for the initial stress at 5% and 6% strain (p < 0.038) and for the initial and equilibrium moduli at the 6% strain level (p < 0.046). The stress reduction in samples from the FL group (45-55%) was less than that in samples from the FT group (37-54%), but this difference was not significant (p > 0.388). The influence of strain level on the parameter values was not statistically significant (p > 0.121). The nonlinear response of the tissue was demonstrated over the chosen strain range.

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Visco-elastic mechanical properties of human abdominal fascia

Cited by 10 publications

References 0 publications

REGIONAL VARIATION IN THE MICROSCOPY AND TENSILE STRENGTH OF THE LINEA ALBA IN THE BABOON (PAPIO ANUBIS). Variación regional de la microscópia y resistencia a la tracción de la línea alba del babuino (Papio Anubis).

REGIONAL VARIATION IN THE MICROSCOPY AND TENSILE STRENGTH OF THE LINEA ALBA IN THE BABOON (PAPIO ANUBIS). Variación regional de la microscópia y resistencia a la tracción de la línea alba del babuino (Papio Anubis).

Unsupervised clustering of materials properties using hierarchical techniques

Time-Dependent Properties of Human Umbilical Fascia

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