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Fluids Mechanic: Artificial Hearts

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Cindy V.

on 9 April 2014

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Transcript of Fluids Mechanic: Artificial Hearts

Thank You!
How does the heart work?
How are the different properties of fluids used in our area of interest?
There are a couple that are used. Starting off with the types of flow the blood the heart pumps. Normally, the blood is flowing in a laminar flow. There are times where the blood turns turbulent, such as when the arteries of the heart are clogged and then the flow of the blood gets disrupted and turns turbulent.
Viscosity, Cohesion, Adhesion?
The viscosity of the blood differs from person to person. If a person's blood is viscous, this means the there's a high count of red blood cells and fat, keeping in mind that the more things in the fluid,the more viscous it is. Cold temperature can make the blood more viscous. If the blood is too cold, the blood doesn't circulate and tissues die because a lack of oxygen and nutrients which leads to hypothermia.
Artificial Heart Transplant
If a person's has a heart failure or needs some help with their heart, the person would need a artificial heart transplant. The artificial heart would replace the left and right ventricle in order for the heart to pump blood again and provide enough blood for the entire body. Currently, there are two types of artificial hearts; CardioWest and AbioCor.
Properties of Fluids
Hearts/Artificial Hearts
Investigating Fluid Mechanics
The flow rate depends on which part of the heart you are talking about. If it's the aorta, the flow rate is 40cm/s for cross section of 3-5cm². If it's the inferior and superior vena cava, the flow rate is 15cm/s for cross section of 14cm². This is the average flow rate. The blood's flow rate varies depending on how thick or thin your blood is.
Our area of interest is in the medical area. This area of interest is helping the needs of the society because it will help people be aware of what you should do to keep your body healthy and how your body works. In our case, it's on hearts.
What is our area of interest?
First, deoxygenated blood enters the heart from the superior and inferior vena cavae to the right atrium. From here, the blood is pumped to the right ventricle through the tricuspid valve. Next, the blood is pumped into the pulmonary artery then to the lungs to receive oxygen. After that, the blood goes back to the heart through the pulmonary vein into the left atrium. Next, the blood is sent to the left ventricle through the initral valve then is pumped into the aorta and the rest of the body.
Heart diagram
When the blood is slow, the cells in the blood reacts which leads to adhesion in the blood. The cells in the blood stick to each other forming clumps which thicken the blood furthermore. People with conditions can have a risk of higher blood viscosity. Clumps in the blood can affect the heart by blocking the arteries, leading to a heart attack or stroke.
Flow Rate
The density of blood varies depending on how much things are in the blood. The average density of blood is 1.060g/mL which means blood is slightly denser than water which is 1.00g/mL.
Blood and water have similar densities= mixing of the two
Since the artificial heart replaces the ventricles, the original arteries are still there. This means that there still is a chance for the person to get a heart attack.
CardioWest Artificial Heart
Abiocor Artifcial Heart
What types of jobs and careers are available in our area of interest?
The jobs would mainly consist of being in the cardiology field. The cardiology jobs/careers consist of keeping the heart healthy, repairing damaged hearts, and helping to prevent, diagnose, and treat cardiovascular problems.
Cardiologist, cardiac surgeon, nursing, allied careers etc. are some jobs that are in the cardiology field.
How the artificial heart works is that the blood can only go through one ventricle at a time. This means the ventricles take turns to send blood to the lungs then to the body unlike the regular heart which does both at the same time.
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