Noninvasive in vivo determination of residual strains and stresses

Journal of Biomechanical Engineering
Samir DonmazovKerem Pekkan

Abstract

Vascular growth and remodeling during embryonic development are associated with blood flow and pressure induced stress distribution, in which residual strains and stresses play a central role. Residual strains are typically measured by performing in vitro tests on the excised vascular tissue. In this paper, we investigated the possibility of estimating residual strains and stresses using physiological pressure-radius data obtained through in vivo noninvasive measurement techniques, such as optical coherence tomography or ultrasound modalities. This analytical approach first tested with in vitro results using experimental data sets for three different arteries such as rabbit carotid artery, rabbit thoracic artery, and human carotid artery based on Fung's pseudostrain energy function and Delfino's exponential strain energy function (SEF). We also examined residual strains and stresses in the human swine iliac artery using the in vivo experimental ultrasound data sets corresponding to the systolic-to-diastolic region only. This allowed computation of the in vivo residual stress information for loading and unloading states separately. Residual strain parameters as well as the material parameters were successfully computed with high...Continue Reading

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Citations

Mar 5, 2020·Biomechanics and Modeling in Mechanobiology·S Samaneh LashkariniaKerem Pekkan
May 16, 2018·Annals of Biomedical Engineering·S Samaneh LashkariniaKerem Pekkan

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