ព្រឹត្តិបត្រស្រាវជ្រាវ (Research Articles)

Title
Effect of distal thickening and stiffening of plaque cap on arterial wall mechanics
Author(s)Pengsrorn Chhai, Kyehan Rhee
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Keywords   Atherosclerotic     Fluid structure interaction     plaque     Stress analysis. Asymmetric stenosis     Tissue property  
Abstract

To investigate the effect of longitudinal variations of cap thickness and tissue properties on wall stresses and strains along the atherosclerotic stenosis, stenotic plaque models (uniformly thick, distally thickened, homogenous, and distally stiffened) were constructed and subjected to computational stress analyses with due consideration of fluid–structure interactions (FSI). The analysis considered three different cap thicknesses—45, 65, and 200 μm—and tissue properties—soft, fibrous, and hard. The maximum peak cap stress (PCS) and strain were observed in the upstream throat section and demonstrated increases of the order of 345 and 190%, respectively, as the cap thickness was reduced from 200 to 45 μm in uniformly thick models. Distal stiffening increased PCS in the downstream region; however, the overall effect of this increase was rather small. Distal thickening did not affect maximum PCS and strain values for cap thicknesses exceeding 65 μm; however, a noticeable increase in maximum PCS and corresponding longitudinal variation (or spatial gradient) in stress was observed in the very thin (45-μm-thick) cap. It was, therefore, inferred that existence of a rather thin upstream cap demonstrating distal cap thickening indicates an increased risk of plaque progression and rupture.

JournalMedical & biological engineering & computing
Publisher/InstitutionSpringer Berlin Heidelberg
Field/FacultyFaculty of Engineering
Publication Year2018
Volumn56
Issue11
Pages2003-2013
DOIhttps://doi.org/10.1007/s11517-018-1839-7
Recommended CitationPengsrorn Chhai, Kyehan Rhee. (2018). Effect of distal thickening and stiffening of plaque cap on arterial wall mechanics. Medical & biological engineering & computing, 56, 2003-2013
Contact Emailpengsrornchhai@yahoo.com