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Updated: Aug 4, 2026
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Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
Published on: July 19, 2016
Fluid flow structure in arterial bypass anastomosis
C M Su1, D Lee, R Tran-Son-Tay
1Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL 32611, USA.
Journal of Biomechanical Engineering
|August 27, 2005
Summary
Fluid flow in bypassed arteries impacts surgery outcomes. Stenosis severity and graft design significantly alter flow patterns, affecting patient recovery.
Area of Science:
- Biomedical Engineering
- Fluid Dynamics
- Cardiovascular Surgery
Background:
- Bypass surgery outcomes are influenced by fluid dynamics in stenosed arteries and grafts.
- Understanding flow patterns is crucial for improving surgical success rates.
Purpose of the Study:
- To investigate steady Navier-Stokes flows in idealized arterial bypass systems with stenoses.
- To analyze the impact of stenosis severity, asymmetry, and graft geometry on flow characteristics.
Main Methods:
- Computational fluid dynamics (CFD) using steady Navier-Stokes equations.
- Modeling of seven geometric configurations with varying stenosis and bypass graft parameters.
Main Results:
- Significant area reduction causes recirculation zones upstream/downstream of stenosis and near the graft toe.
- Stenosis asymmetry and location influence recirculation zone size and position.
- Bypass graft curvature alters flow structures throughout the entire system.
Conclusions:
- Flow recirculation is a key factor influenced by stenosis and graft geometry.
- Optimal graft design and stenosis management are critical for favorable surgical outcomes.
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01:29Blood Flow
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01:19Anastomoses
In human anatomy, anastomosis refers to a connection or opening between two things, particularly between blood vessels or other tubular structures. The term is derived from the Greek term 'anastomosis,' which means 'outlet' or 'opening.' This natural network of connections plays a critical role in the survival and functionality of the human body.
Anastomoses can be formed at arterial, venous, and lymphatic vessels.
Arterial Anastomosis: These occur between arteries. They are most common in...
Anastomoses can be formed at arterial, venous, and lymphatic vessels.
Arterial Anastomosis: These occur between arteries. They are most common in...
01:17Autoregulation of Blood Flow
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
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