Mechanical characterisation of porcine rectus sheath under uniaxial and biaxial tension.

Hdl Handle:
http://hdl.handle.net/10147/336298
Title:
Mechanical characterisation of porcine rectus sheath under uniaxial and biaxial tension.
Authors:
Lyons, Mathew; Winter, Des C; Simms, Ciaran K
Affiliation:
Trinity Centre for Bioengineering, Department of Mechanical and Manufacturing Engineering, Parsons Building, Trinity College, Dublin 2, Ireland. Electronic address: lyonsm2@tcd.ie.
Citation:
Mechanical characterisation of porcine rectus sheath under uniaxial and biaxial tension. 2014, 47 (8):1876-84 J Biomech
Journal:
Journal of biomechanics
Issue Date:
3-Jun-2014
URI:
http://hdl.handle.net/10147/336298
DOI:
10.1016/j.jbiomech.2014.03.009
PubMed ID:
24725440
Abstract:
Incisional hernia development is a significant complication after laparoscopic abdominal surgery. Intra-abdominal pressure (IAP) is known to initiate the extrusion of intestines through the abdominal wall, but there is limited data on the mechanics of IAP generation and the structural properties of rectus sheath. This paper presents an explanation of the mechanics of IAP development, a study of the uniaxial and biaxial tensile properties of porcine rectus sheath, and a simple computational investigation of the tissue. Analysis using Laplace׳s law showed a circumferential stress in the abdominal wall of approx. 1.1MPa due to an IAP of 11kPa, commonly seen during coughing. Uniaxial and biaxial tensile tests were conducted on samples of porcine rectus sheath to characterise the stress-stretch responses of the tissue. Under uniaxial tension, fibre direction samples failed on average at a stress of 4.5MPa at a stretch of 1.07 while cross-fibre samples failed at a stress of 1.6MPa under a stretch of 1.29. Under equi-biaxial tension, failure occurred at 1.6MPa with the fibre direction stretching to only 1.02 while the cross-fibre direction stretched to 1.13. Uniaxial and biaxial stress-stretch plots are presented allowing detailed modelling of the tissue either in silico or in a surrogate material. An FeBio computational model of the tissue is presented using a combination of an Ogden and an exponential power law model to represent the matrix and fibres respectively. The structural properties of porcine rectus sheath have been characterised and add to the small set of human data in the literature with which it may be possible to develop methods to reduce the incidence of incisional hernia development.
Item Type:
Article
Language:
en
MeSH:
Abdominal Wall; Animals; Biomechanical Phenomena; Equipment Design; Humans; Models, Anatomic; Pressure; Stress, Mechanical; Swine; Tensile Strength
ISSN:
1873-2380

Full metadata record

DC FieldValue Language
dc.contributor.authorLyons, Mathewen_GB
dc.contributor.authorWinter, Des Cen_GB
dc.contributor.authorSimms, Ciaran Ken_GB
dc.date.accessioned2014-11-27T16:48:22Z-
dc.date.available2014-11-27T16:48:22Z-
dc.date.issued2014-06-03-
dc.identifier.citationMechanical characterisation of porcine rectus sheath under uniaxial and biaxial tension. 2014, 47 (8):1876-84 J Biomechen_GB
dc.identifier.issn1873-2380-
dc.identifier.pmid24725440-
dc.identifier.doi10.1016/j.jbiomech.2014.03.009-
dc.identifier.urihttp://hdl.handle.net/10147/336298-
dc.description.abstractIncisional hernia development is a significant complication after laparoscopic abdominal surgery. Intra-abdominal pressure (IAP) is known to initiate the extrusion of intestines through the abdominal wall, but there is limited data on the mechanics of IAP generation and the structural properties of rectus sheath. This paper presents an explanation of the mechanics of IAP development, a study of the uniaxial and biaxial tensile properties of porcine rectus sheath, and a simple computational investigation of the tissue. Analysis using Laplace׳s law showed a circumferential stress in the abdominal wall of approx. 1.1MPa due to an IAP of 11kPa, commonly seen during coughing. Uniaxial and biaxial tensile tests were conducted on samples of porcine rectus sheath to characterise the stress-stretch responses of the tissue. Under uniaxial tension, fibre direction samples failed on average at a stress of 4.5MPa at a stretch of 1.07 while cross-fibre samples failed at a stress of 1.6MPa under a stretch of 1.29. Under equi-biaxial tension, failure occurred at 1.6MPa with the fibre direction stretching to only 1.02 while the cross-fibre direction stretched to 1.13. Uniaxial and biaxial stress-stretch plots are presented allowing detailed modelling of the tissue either in silico or in a surrogate material. An FeBio computational model of the tissue is presented using a combination of an Ogden and an exponential power law model to represent the matrix and fibres respectively. The structural properties of porcine rectus sheath have been characterised and add to the small set of human data in the literature with which it may be possible to develop methods to reduce the incidence of incisional hernia development.en_GB
dc.language.isoenen
dc.rightsArchived with thanks to Journal of biomechanicsen_GB
dc.subject.meshAbdominal Wall-
dc.subject.meshAnimals-
dc.subject.meshBiomechanical Phenomena-
dc.subject.meshEquipment Design-
dc.subject.meshHumans-
dc.subject.meshModels, Anatomic-
dc.subject.meshPressure-
dc.subject.meshStress, Mechanical-
dc.subject.meshSwine-
dc.subject.meshTensile Strength-
dc.titleMechanical characterisation of porcine rectus sheath under uniaxial and biaxial tension.en_GB
dc.typeArticleen
dc.contributor.departmentTrinity Centre for Bioengineering, Department of Mechanical and Manufacturing Engineering, Parsons Building, Trinity College, Dublin 2, Ireland. Electronic address: lyonsm2@tcd.ie.en_GB
dc.identifier.journalJournal of biomechanicsen_GB
dc.description.fundingNo fundingen
dc.description.provinceLeinsteren
dc.description.peer-reviewpeer-reviewen

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