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Analysis of viscoelastic wall properties in ovine arteries.
IEEE Trans Biomed Eng 2009; 56(2):210-9IT

Abstract

In this paper, we analyze how elastic and viscoelastic properties differ across seven locations along the large arteries in 11 sheep. We employ a two-parameter elastic model and a four-parameter Kelvin viscoelastic model to analyze experimental measurements of vessel diameter and blood pressure obtained in vitro at conditions mimicking in vivo dynamics. Elastic and viscoelastic wall properties were assessed via solutions to the associated inverse problem. We use sensitivity analysis to rank the model parameters from the most to the least sensitive, as well as to compute standard errors and confidence intervals. Results reveal that elastic properties in both models (including Young's modulus and the viscoelastic relaxation parameters) vary across locations (smaller arteries are stiffer than larger arteries). We also show that for all locations, the inclusion of viscoelastic behavior is important to capture pressure-area dynamics.

Authors+Show Affiliations

Department of Mathematics, North Carolina State University, Raleigh, NC 27695 USA.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

19272946

Citation

Valdez-Jasso, Daniela, et al. "Analysis of Viscoelastic Wall Properties in Ovine Arteries." IEEE Transactions On Bio-medical Engineering, vol. 56, no. 2, 2009, pp. 210-9.
Valdez-Jasso D, Haider MA, Banks HT, et al. Analysis of viscoelastic wall properties in ovine arteries. IEEE Trans Biomed Eng. 2009;56(2):210-9.
Valdez-Jasso, D., Haider, M. A., Banks, H. T., Bia Santana, D., Zócalo Germán, Y., Armentano, R. L., & Olufsen, M. S. (2009). Analysis of viscoelastic wall properties in ovine arteries. IEEE Transactions On Bio-medical Engineering, 56(2), pp. 210-9. doi:10.1109/TBME.2008.2003093.
Valdez-Jasso D, et al. Analysis of Viscoelastic Wall Properties in Ovine Arteries. IEEE Trans Biomed Eng. 2009;56(2):210-9. PubMed PMID: 19272946.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of viscoelastic wall properties in ovine arteries. AU - Valdez-Jasso,Daniela, AU - Haider,Mansoor A, AU - Banks,H T, AU - Bia Santana,Daniel, AU - Zócalo Germán,Yanina, AU - Armentano,Ricardo L, AU - Olufsen,Mette S, Y1 - 2008/08/15/ PY - 2009/3/11/entrez PY - 2009/3/11/pubmed PY - 2009/9/3/medline SP - 210 EP - 9 JF - IEEE transactions on bio-medical engineering JO - IEEE Trans Biomed Eng VL - 56 IS - 2 N2 - In this paper, we analyze how elastic and viscoelastic properties differ across seven locations along the large arteries in 11 sheep. We employ a two-parameter elastic model and a four-parameter Kelvin viscoelastic model to analyze experimental measurements of vessel diameter and blood pressure obtained in vitro at conditions mimicking in vivo dynamics. Elastic and viscoelastic wall properties were assessed via solutions to the associated inverse problem. We use sensitivity analysis to rank the model parameters from the most to the least sensitive, as well as to compute standard errors and confidence intervals. Results reveal that elastic properties in both models (including Young's modulus and the viscoelastic relaxation parameters) vary across locations (smaller arteries are stiffer than larger arteries). We also show that for all locations, the inclusion of viscoelastic behavior is important to capture pressure-area dynamics. SN - 1558-2531 UR - https://www.unboundmedicine.com/medline/citation/19272946/Analysis_of_viscoelastic_wall_properties_in_ovine_arteries_ L2 - https://dx.doi.org/10.1109/TBME.2008.2003093 DB - PRIME DP - Unbound Medicine ER -