This presentation summarizes a modeling and simulation of atherosclerosis in the coronary arteries. It discusses how plaque builds up in the coronary arteries, reducing blood flow velocity over time. The group used COMSOL to simulate plaque deposition in a modeled coronary artery and measure the decreasing blood velocity. The simulation showed the artery became completely blocked when plaque reached 1.9mm in size, demonstrating how plaque leads to reduced blood flow and coronary thrombosis.
Numerical simulation of blood flow in flexible arteries using Fluid-Structure...Mostafa Ghadamyari
We'll model and simulate a simple artery using pressure-based and velocity-based inlet profiles by Adina systems, Comsol Multiphysics, Ansys CFX & structural coupling and Ansys Fluent & structural coupling.
Numerical simulation of blood flow in flexible arteries using Fluid-Structure...Mostafa Ghadamyari
We'll model and simulate a simple artery using pressure-based and velocity-based inlet profiles by Adina systems, Comsol Multiphysics, Ansys CFX & structural coupling and Ansys Fluent & structural coupling.
EFFECT OF NEGATIVE ANGLE CANNULATION DURING CARDIOPULMONARY BYPASS – A COMPUT...ijbesjournal
Creation of emboli in the aortic root and changes in flow distribution between supra-aortic arteries and descending aorta can lead to stroke and perfusion related tissue damage during cardiopulmonary bypass. A thorough understanding of how the angle of cannulation affects the overall success of cardiopulmonary bypass during cannulation of the ascending aorta is needed. Previous simulation research has observed the effect of outflow cannula position by changing the location of the cannulation site to the subclavian artery and other vessels, as well as positions for innovative cannula designs. The purpose of this study is to evaluate the success of the procedure while using a straight cannula, modulating the angle of cannulation below horizontal in the frontal plane. A simplified geometry of the aorta was used. The success of the procedure was quantified by observing wall shear stress, normal stress, intra-fluid shear stress, and flow distribution. A numerical study was performed to solve the Reynolds Averaged Naiver Stokes governing equations, which were used in conjunction with a constant density fluid to simulate blood, and a realizable two-layer k-ε turbulence model
All about arterial and venous embolectomy, thrombectomy and thrombo-embolectomy
basic definitions, diagrammatic differences, factors, Virchow's triad, signs and symptoms , investigations and treatments
EFFECT OF NEGATIVE ANGLE CANNULATION DURING CARDIOPULMONARY BYPASS – A COMPUT...ijbesjournal
Creation of emboli in the aortic root and changes in flow distribution between supra-aortic arteries and descending aorta can lead to stroke and perfusion related tissue damage during cardiopulmonary bypass. A thorough understanding of how the angle of cannulation affects the overall success of cardiopulmonary bypass during cannulation of the ascending aorta is needed. Previous simulation research has observed the effect of outflow cannula position by changing the location of the cannulation site to the subclavian artery and other vessels, as well as positions for innovative cannula designs. The purpose of this study is to evaluate the success of the procedure while using a straight cannula, modulating the angle of cannulation below horizontal in the frontal plane. A simplified geometry of the aorta was used. The success of the procedure was quantified by observing wall shear stress, normal stress, intra-fluid shear stress, and flow distribution. A numerical study was performed to solve the Reynolds Averaged Naiver Stokes governing equations, which were used in conjunction with a constant density fluid to simulate blood, and a realizable two-layer k-ε turbulence model
All about arterial and venous embolectomy, thrombectomy and thrombo-embolectomy
basic definitions, diagrammatic differences, factors, Virchow's triad, signs and symptoms , investigations and treatments
3. CORONARY ARTERIES
Arteries are vessels that carry blood away from the heart.
The coronary arteries are the first blood vessels that
branch off from the ascending aorta. The aorta is the
largest artery in the body. It transports and distributes
oxygen rich blood to all arteries. The coronary arteries
extend from the aorta to the heart walls supplying blood
to the atria, ventricles, and septum of the heart
4. What Is Coronary Heart Disease?
Coronary heart disease (CHD) is a disease in which a waxy substance called
plaque builds up inside the coronary arteries. These arteries supply oxygen-rich
blood to your heart muscle.
When plaque builds up in the arteries, the condition is called Atherosclerosis.The
buildup of plaque occurs over many years.
5. SYMPTOMS
It may feel heavy or like someone is squeezing your
heart. You may feel it under your breast bone
(sternum), but also in your neck, arms, stomach, or
upper back.
Other symptoms include shortness of breath and
fatigue with activity (exertion).
Women, elderly people, and people with diabetes
are more likely to have symptoms other than chest
pain, such as:
Fatigue
Shortness of breath
General weakness
7. MODELING & SIMULING OF CORONARY ARTERY
In order to view the change in velocity of
blood due to variable plaque deposition in
coronary artery.
Thus this provides the inter relationship of
plaque deposition with the velocity of Blood
and clotting of blood due to flow reduction.
8. COMSOL
It has been declared for the simulation
purpose because it contains multiphysics
parameters which would be the guide line
toward the completion of model in a short
duration for this theme.
9. DIMENSION OF CORONARY ARTERY
Diameter : 2.9 mm
Wall thickness : 0.5mm
Depth from body surface : 35mm
12. BLOOD PARAMETERS IN CORONARY ARTERY
Density :1050 kg/m^3
Dynamic viscosity : 0.04 Pa.s
Velocity :0.3 m/s
13. SIMULING VIDEO OF PLAQUE DEPOSITION
Wait for few seconds
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14. GRAPH OF PLAQUE DEPOSITION VS
CHANGE IN BLOOD VELOCITY
The velocity is measured from fix point just above
the plaque deposition along the artery wall.
16. CONCLUSION
By observing the clip we can identify the
change in velocity of blood flow as well as the
clotting of blood due to increase in dynamic
viscosity with plaque deposition which
results in Coronary thrombosis (heart attack).