Flow observations in elastic stenosis biomodel with comparison to rigid-like model

Yasutomo Shimizu, Ashkan Javadzadegan, Toshiyuki Hayase, Makoto Ohta

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

BACKGROUND: Plaques in blood vessels exhibit a wide range of stiffness depending on disease conditions: stiffness is an important factor in plaque behavior. The geometrical change in plaque based on its behavior can affect blood flow patterns. Thus, it is important to study both blood flow and deformation of plaques and blood vessels. OBJECTIVE: This study aims to identify the differences in flow conditions between in vitro models to discuss experimental materials for arterial wall and flow observation. METHODS: In order to observe the blood flow pattern and plaque deformation simultaneously, a PVA-H stenosis model was used. In addition, a silicone model was also used as a rigid-like model for comparison with the PVA-H model. PIV was employed to measure the flow velocity distribution and determine the flow levels in the models. RESULTS: PVA-H model exhibits expansion with an increase in upstream pressure and silicone model maintains the diameter. The expansion depends on their mechanical properties and influences flow conditions such as velocity changes and RAP in the parent artery. The balance between the expansion and change in flow conditions determines the final geometries of PVA-H model and flow pattern. CONCLUSIONS: The results suggest that the stiffness measurement for blood vessels and plaques such as ultrasound measurements would be important for accurate treatments.

Original languageEnglish
Pages (from-to)305-314
Number of pages10
JournalTechnology and Health Care
Volume21
Issue number4
DOIs
Publication statusPublished - 2013 Sep 25

Keywords

  • Biomodel
  • PIV
  • PVA-H
  • plaque stiffness
  • reattachment point
  • silicone

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Information Systems
  • Biomedical Engineering
  • Health Informatics

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