Abstract
A thorough understanding of the diseased tissue state is necessary for the successful treatment of a blocked arterial vessel using stent angioplasty. The constitutive representation of atherosclerotic tissue is of great interest to researchers and engineers using computational models to analyse stents, as it is this in silico environment that allows extensive exploration of tissue response to device implantation. This paper presents an in silico evaluation of the effects of variation of atherosclerotic tissue constitutive representation on tissue mechanical response during stent implantation. The motivation behind this work is to investigate the level of detail that is required when modelling atherosclerotic tissue in a stenting simulation, and to give recommendations to the FDA for their guideline document on coronary stent evaluation, and specifically the current requirements for computational stress analyses. This paper explores the effects of variation of the material model for the atherosclerotic tissue matrix, the effects of inclusion of calcifications and a lipid pool, and finally the effects of inclusion of the Mullins effect in the atherosclerotic tissue matrix, on tissue response in stenting simulations. Results indicate that the inclusion of the Mullins effect in a direct stenting simulation does not have a significant effect on the deformed shape of the tissue or the stress state of the tissue. The inclusion of a lipid pool induces a local redistribution of lesion deformation for a soft surrounding matrix and the inclusion of a small volume of calcifications dramatically alters the local results for a soft surrounding matrix. One of the key findings from this work is that the underlying constitutive model (elasticity model) used for the atherosclerotic tissue is the dominant feature of the tissue representation in predicting tissue response in a stenting simulation.
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References
Akyildiz, A. C., L. Speelman, and F. J. H. Gijsen. Mechanical properties of human atherosclerotic intima tissue. J. Biomech. 3(47):773–783, 2014.
Anon. Abaqus 6.10 Theory Manual, DS SIMULIA Corp., Providence, RI, USA 2010.
Barrett, S. R. H., M. P. F. Sutcliffe, S. Howarth, Z. Li, and J. H. Gillard. Experimental measurement of the mechanical properties of carotid atherothrombotic plaque fibrous cap. J. Biomech. 42:1650–1655, 2009.
Bedoya, J., C. A. Meyer, L. H. Timmins, M. R. Moreno, and J. E. Moore, Jr. Effects of stent design parameters on normal artery wall mechanics. J. Biomech. Eng. 128:757–765, 2006.
Brinkhues, S., D. Balzani, and G. A. Holzapfel. Simulation of damage hysteresis in soft biological tissues. PAMM 9:155–156, 2009.
Capelli, C., F. Gervaso, L. Petrini, G. Dubini, and F. Migliavacca. Assessment of tissue prolapse after balloon-expandable stenting: influence of stent cell geometry. Med. Eng. Phys. 31:441–447, 2009.
Cardoso, L., and S. Weinbaum. Changing views of the biomechanics of vulnerable plaque rupture: a review. Ann. Biomed. Eng. 42:415–431, 2014.
Chai, C.-K., A. C. Akyildiz, L. Speelman, F. J. H. Gijsen, C. W. J. Oomens, M. R. H. M. van Sambeek, et al. Local axial compressive mechanical properties of human carotid atherosclerotic plaques-characterisation by indentation test and inverse finite element analysis. J. Biomech. 21(46):1759–1766, 2013.
Chai, C.-K., L. Speelman, C. W. J. Oomens, and F. P. T. Baaijens. Compressive mechanical properties of atherosclerotic plaques–indentation test to characterise the local anisotropic behaviour. J. Biomech. 3(47):784–792, 2014.
Cheng, G. C., H. M. Loree, R. D. Kamm, M. C. Fishbein, and R. T. Lee. Distribution of circumferential stress in ruptured and stable atherosclerotic lesions. A structural analysis with histopathological correlation. Circulation 87:1179–1187, 1993.
Chua, S. N. D., B. J. Mac Donald, and M. S. J. Hashmi. Finite-element simulation of stent expansion. J. Mater. Process. Technol. 15(120):335–340, 2002.
Conway, C., F. Sharif, J. McGarry, and P. McHugh. A computational test-bed to assess coronary stent implantation mechanics using a population-specific approach. Cardiovasc. Eng. Technol. 3:1–14, 2012.
Ebenstein, D. M., D. Coughlin, J. Chapman, C. Li, and L. A. Pruitt. Nanomechanical properties of calcification, fibrous tissue, and hematoma from atherosclerotic plaques. J. Biomed. Mater. Res. Part A 15(91A):1028–1037, 2009.
FDA. Non-Clinical Engineering Tests and Recommended Labeling for Intravascular Stents and Associated Delivery Systems [Internet] [cited 2012 June 25]: Available from: http://www.fda.gov/medicaldevices/deviceregulationandguidance/guidancedocuments/ucm071863.htm.
García, A., E. Peña, and M. A. Martínez. Influence of geometrical parameters on radial force during self-expanding stent deployment. Application for a variable radial stiffness stent. J. Mech. Behav. Biomed. Mater. 10:166–175, 2012.
Gasser, T. C., R. W. Ogden, and G. A. Holzapfel. Hyperelastic modelling of arterial layers with distributed collagen fibre orientations. J. R. Soc. Interface 3:15–35, 2006.
Gastaldi, D., S. Morlacchi, R. Nichetti, C. Capelli, G. Dubini, L. Petrini, et al. Modelling of the provisional side-branch stenting approach for the treatment of atherosclerotic coronary bifurcations: effects of stent positioning. Biomech. Model. Mechanobiol. 9:551–561, 2010.
Gijsen, F. J. H., and F. Migliavacca. Plaque mechanics. J. Biomech. 3(47):763–764, 2014.
Grogan, J. A., B. J. O’Brien, S. B. Leen, and P. E. McHugh. A corrosion model for bioabsorbable metallic stents. Acta Biomater. 7:3523–3533, 2011.
Grogan, J. A., S. B. Leen, and P. E. McHugh. Optimizing the design of a bioabsorbable metal stent using computer simulation methods. Biomaterials 34:8049–8060, 2013.
Harewood, F., J. Grogan, and P. McHugh. A multiscale approach to failure assessment in deployment for cardiovascular stents. J. Multiscal. Model. 2:1–22, 2010.
Holzapfel, G. A., G. Sommer, and P. Regitnig. Anisotropic mechanical properties of tissue components in human atherosclerotic plaques. J. Biomech. Eng. 126:657–665, 2004.
Holzapfel, G. A., M. Stadler, and T. C. Gasser. Changes in the mechanical environment of stenotic arteries during interaction with stents: computational assessment of parametric stent designs. J. Biomech. Eng. 127:166–180, 2005.
Holzapfel, G. A., J. J. Mulvihill, E. M. Cunnane, and M. T. Walsh. Computational approaches for analyzing the mechanics of atherosclerotic plaques: a review. J. Biomech. 47:859–869, 2014.
Iannaccone, F., N. Debusschere, S. De Bock, M. De Beule, D. Van Loo, F. Vermassen, et al. The influence of vascular anatomy on carotid artery stenting: a parametric study for damage assessment. J. Biomech. 3(47):890–898, 2014.
Kelly, N., and J. P. McGarry. Experimental and numerical characterisation of the elasto-plastic properties of bovine trabecular bone and a trabecular bone analogue. J. Mech. Behav. Biomed. Mater. 9:184–197, 2012.
Kelly, N., N. M. Harrison, P. McDonnell, and J. P. McGarry. An experimental and computational investigation of the post-yield behaviour of trabecular bone during vertebral device subsidence. Biomech. Model. Mechanobiol. 12:685–703, 2013.
Kelly-Arnold, A., N. Maldonado, D. Laudier, E. Aikawa, L. Cardoso, and S. Weinbaum. Revised microcalcification hypothesis for fibrous cap rupture in human coronary arteries. Proc. Natl. Acad. Sci. USA 25(110):10741–10746, 2013.
Kolandaivelu, K., B. B. Leiden, and E. R. Edelman. Predicting response to endovascular therapies: dissecting the roles of local lesion complexity, systemic comorbidity, and clinical uncertainty. J. Biomech. 3(47):908–921, 2014.
Laroche, D., S. Delorme, T. Anderson, and R. DiRaddo. Computer prediction of friction in balloon angioplasty and stent implantation. Biomed. Simul. 4072:1–8, 2006.
Lawlor, M. G., M. R. O’Donnell, B. M. O’Connell, and M. T. Walsh. Experimental determination of circumferential properties of fresh carotid artery plaques. J. Biomech. 3(44):1709–1715, 2011.
Lee, R., A. Grodzinsky, E. Frank, R. Kamm, and F. Schoen. Structure-dependent dynamic mechanical behavior of fibrous caps from human atherosclerotic plaques. Circulation 83:1764–1770, 1991.
Li, Z.-Y., S. Howarth, R. A. Trivedi, J. M. U-King-Im, M. J. Graves, A. Brown, et al. Stress analysis of carotid plaque rupture based on in vivo high resolution MRI. J. Biomech. 39:2611–2622, 2006.
Loree, H. M., A. J. Grodzinsky, S. Y. Park, L. J. Gibson, and R. T. Lee. Static circumferential tangential modulus of human atherosclerotic tissue. J. Biomech. 27:195–204, 1994.
Loree, H. M., B. J. Tobias, L. J. Gibson, R. D. Kamm, D. M. Small, and R. T. Lee. Mechanical properties of model atherosclerotic lesion lipid pools. Arterioscler. Thromb. Vasc. Biol. 1(14):230–234, 1994.
Maher, E., A. Creane, S. Sultan, N. Hynes, C. Lally, and D. J. Kelly. Tensile and compressive properties of fresh human carotid atherosclerotic plaques. J. Biomech. 11(42):2760–2767, 2009.
Maher, E., A. Creane, S. Sultan, N. Hynes, C. Lally, and D. J. Kelly. Inelasticity of human carotid atherosclerotic plaque. Ann. Biomed. Eng. 27(39):2445–2455, 2011.
Maher, E., A. Creane, S. Sultan, N. Hynes, C. Lally, and D. J. Kelly. Inelasticity of human carotid atherosclerotic plaque. Ann. Biomed. Eng. 39:2445–2455, 2011.
Maldonado, N., A. Kelly-Arnold, Y. Vengrenyuk, D. Laudier, J. T. Fallon, R. Virmani, et al. A mechanistic analysis of the role of microcalcifications in atherosclerotic plaque stability: potential implications for plaque rupture. Am. J. Physiol. Heart Circ. Physiol. 1(303):H619–H628, 2012.
McGarry, J. P., B. P. O’Donnell, P. E. McHugh, E. O’Cearbhaill, and R. M. McMeeking. Computational examination of the effect of material inhomogeneity on the necking of stent struts under tensile loading. J. Appl. Mech. 74:978–989, 2007.
Morlacchi, S., and F. Migliavacca. Modeling stented coronary arteries: where we are, where to go. Ann. Biomed. Eng. 41:1428–1444, 2013.
Morlacchi, S., S. G. Colleoni, R. Cárdenes, C. Chiastra, J. L. Diez, I. Larrabide, et al. Patient-specific simulations of stenting procedures in coronary bifurcations: two clinical cases. Med. Eng. Phys. 35:1272–1281, 2013.
Morlacchi, S., G. Pennati, L. Petrini, G. Dubini, and F. Migliavacca. Influence of plaque calcifications on coronary stent fracture: a numerical fatigue life analysis including cardiac wall movement. J. Biomech. 3(47):899–907, 2014.
Mortier, P., M. D. Beule, S. G. Carlier, R. V. Impe, B. Verhegghe, and P. Verdonck. Numerical study of the uniformity of balloon-expandable stent deployment. J. Biomech. Eng. 130:021018, 2008.
Mortier, P., G. A. Holzapfel, M. De Beule, D. Van Loo, Y. Taeymans, P. Segers, et al. A novel simulation strategy for stent insertion and deployment in curved coronary bifurcations: comparison of three drug-eluting stents. Ann. Biomed. Eng. 38:88–99, 2010.
Mulvihill, J. J., and M. T. Walsh. On the mechanical behaviour of carotid artery plaques: the influence of curve-fitting experimental data on numerical model results. Biomech. Model. Mechanobiol. 12:975–985, 2013.
Mulvihill, J. J., E. M. Cunnane, S. M. McHugh, E. G. Kavanagh, S. R. Walsh, and M. T. Walsh. Mechanical, biological and structural characterization of in vitro ruptured human carotid plaque tissue. Acta Biomater. 9:9027–9035, 2013.
Ogden, R. W., and D. G. Roxburgh. A pseudo-elastic model for the Mullins effect in filled rubber. Proc. R Soc. Lond. A 455:2861–2877, 1999.
Pericevic, I., C. Lally, D. Toner, and D. J. Kelly. The influence of plaque composition on underlying arterial wall stress during stent expansion: the case for lesion-specific stents. Med. Eng. Phys. 31:428–433, 2009.
Rambhia, S. H., X. Liang, M. Xenos, Y. Alemu, N. Maldonado, A. Kelly, et al. Microcalcifications increase coronary vulnerable plaque rupture potential: a patient-based micro-CT fluid-structure interaction study. Ann. Biomed. Eng. 40:1443–1454, 2012.
Salunke, N. V., L. D. T. Topoleski, J. D. Humphrey, and W. J. Mergner. Compressive stress-relaxation of human atherosclerotic plaque. J. Biomed. Mater. Res. 55:236–241, 2001.
Stary, H. Atlas of Atherosclerosis Progression and Regression. New York: Parthenon Publishing, 1999.
Stary, H. C. Natural history of calcium deposits in atherosclerosis progression and regression. Z Kardiol 1(89):S028–S035, 2000.
Teng, Z., D. Tang, J. Zheng, P. K. Woodard, and A. H. Hoffman. An experimental study on the ultimate strength of the adventitia and media of human atherosclerotic carotid arteries in circumferential and axial directions. J. Biomech. 13(42):2535–2539, 2009.
Timmins, L. H., C. A. Meyer, M. R. Moreno, and J. E. Moore, Jr. Effects of stent design and atherosclerotic plaque composition on arterial wall biomechanics. J. Endovasc. Ther. 15:643–654, 2008.
Topoleski, L. D. T., N. V. Salunke, J. D. Humphrey, and W. J. Mergner. Composition- and history-dependent radial compressive behavior of human atherosclerotic plaque. J. Biomed. Mater. Res. 35:117–127, 1997.
Vavuranakis, M., K. Toutouzas, C. Stefanadis, C. Chrisohou, D. Markou, and P. Toutouzas. Stent deployment in calcified lesions: can we overcome calcific restraint with high-pressure balloon inflations? Catheter. Cardiovasc. Interv. 52:164–172, 2001.
Vengrenyuk, Y., S. Carlier, S. Xanthos, L. Cardoso, P. Ganatos, R. Virmani, et al. A hypothesis for vulnerable plaque rupture due to stress-induced debonding around cellular microcalcifications in thin fibrous caps. Proc. Natl. Acad. Sci. USA 3(103):14678–14683, 2006.
Walraevens, J., B. Willaert, G. De Win, A. Ranftl, J. De Schutter, and J. V. Sloten. Correlation between compression, tensile and tearing tests on healthy and calcified aortic tissues. Med. Eng. Phys. 30:1098–1104, 2008.
Walsh, M. T., E. M. Cunnane, J. J. Mulvihill, A. C. Akyildiz, F. J. H. Gijsen, and G. A. Holzapfel. Uniaxial tensile testing approaches for characterisation of atherosclerotic plaques. J. Biomech. 3(47):793–804, 2014.
Wenk, J. F. Numerical modeling of stress in stenotic arteries with microcalcifications: a parameter sensitivity study. J. Biomech. Eng. 133:014503, 2010.
Zahedmanesh, H., D. John Kelly, and C. Lally. Simulation of a balloon expandable stent in a realistic coronary artery—determination of the optimum modelling strategy. J. Biomech. 43:2126–2132, 2010.
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The authors would like to acknowledge funding from the Irish Research Council/Irish Research Council for Science, Engineering and Technology under the Embark Initiative (C. Conway) and the SFI/HEA Irish Centre for High End Computing for the provision of computational facilities and support.
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Associate Editor Estefanía Peña oversaw the review of this article.
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Conway, C., McGarry, J.P. & McHugh, P.E. Modelling of Atherosclerotic Plaque for Use in a Computational Test-Bed for Stent Angioplasty. Ann Biomed Eng 42, 2425–2439 (2014). https://doi.org/10.1007/s10439-014-1107-4
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DOI: https://doi.org/10.1007/s10439-014-1107-4