000070809 001__ 70809
000070809 005__ 20190709135423.0
000070809 0247_ $$2doi$$a10.1016/j.jmbbm.2016.11.007
000070809 0248_ $$2sideral$$a97118
000070809 037__ $$aART-2017-97118
000070809 041__ $$aeng
000070809 100__ $$0(orcid)0000-0003-0978-3489$$aSimón-Allué, R.
000070809 245__ $$aTowards the mechanical characterization of abdominal wall by inverse analysis
000070809 260__ $$c2017
000070809 5060_ $$aAccess copy available to the general public$$fUnrestricted
000070809 5203_ $$aThe aim of this study is to characterize the passive mechanical behaviour of abdominal wall in vivo in an animal model using only external cameras and numerical analysis. The main objective lies in defining a methodology that provides in vivo information of a specific patient without altering mechanical properties. It is demonstrated in the mechanical study of abdomen for hernia purposes. Mechanical tests consisted on pneumoperitoneum tests performed on New Zealand rabbits, where inner pressure was varied from 0 mmHg to 12 mmHg. Changes in the external abdominal surface were recorded and several points were tracked. Based on their coordinates we reconstructed a 3D finite element model of the abdominal wall, considering an incompressible hyperelastic material model defined by two parameters. The spatial distributions of these parameters (shear modulus and non linear parameter) were calculated by inverse analysis, using two different types of regularization: Total Variation Diminishing (TVD) and Tikhonov (H1). After solving the inverse problem, the distribution of the material parameters were obtained along the abdominal surface. Accuracy of the results was evaluated for the last level of pressure. Results revealed a higher value of the shear modulus in a wide stripe along the craneo-caudal direction, associated with the presence of linea alba in conjunction with fascias and rectus abdominis. Non linear parameter distribution was smoother and the location of higher values varied with the regularization type. Both regularizations proved to yield in an accurate predicted displacement field, but H1 obtained a smoother material parameter distribution while TVD included some discontinuities. The methodology here presented was able to characterize in vivo the passive non linear mechanical response of the abdominal wall.
000070809 536__ $$9info:eu-repo/grantAgreement/ES/ISCIII/CIBER-BBN$$9info:eu-repo/grantAgreement/ES/MINECO/BES-2012-053422$$9info:eu-repo/grantAgreement/ES/MINECO/DPI2014-54981-R$$9info:eu-repo/grantAgreement/ES/MINECO/EEBB-I-14-08368$$9info:eu-repo/grantAgreement/ES/MINECO/EEBB-I-15-09811
000070809 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000070809 590__ $$a3.239$$b2017
000070809 591__ $$aENGINEERING, BIOMEDICAL$$b18 / 78 = 0.231$$c2017$$dQ1$$eT1
000070809 591__ $$aMATERIALS SCIENCE, BIOMATERIALS$$b15 / 33 = 0.455$$c2017$$dQ2$$eT2
000070809 592__ $$a0.958$$b2017
000070809 593__ $$aBiomedical Engineering$$c2017$$dQ1
000070809 593__ $$aMechanics of Materials$$c2017$$dQ1
000070809 593__ $$aBiomaterials$$c2017$$dQ2
000070809 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000070809 700__ $$0(orcid)0000-0001-9713-1813$$aCalvo, B.$$uUniversidad de Zaragoza
000070809 700__ $$aOberai, A. A.
000070809 700__ $$aBarbone, P. E.
000070809 7102_ $$15004$$2605$$aUniversidad de Zaragoza$$bDpto. Ingeniería Mecánica$$cÁrea Mec.Med.Cont. y Teor.Est.
000070809 773__ $$g66 (2017), 127-137$$pJ. mech. behav. boomed. mater.$$tJournal of the Mechanical Behavior of Biomedical Materials$$x1751-6161
000070809 8564_ $$s757498$$uhttps://zaguan.unizar.es/record/70809/files/texto_completo.pdf$$yPostprint
000070809 8564_ $$s90695$$uhttps://zaguan.unizar.es/record/70809/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000070809 909CO $$ooai:zaguan.unizar.es:70809$$particulos$$pdriver
000070809 951__ $$a2019-07-09-11:27:27
000070809 980__ $$aARTICLE