Project- Blood Pump - Fluid Mechanics-Project-Blood Pump...

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Fluid Mechanics-Project-Blood Pump 2/11/2012 Damien Fuser: 11000736 Thomas Caruana: 11000712 James Georgiades: 10999934 Lawrence Fernandes: 11000559 Edward D’onofrio: 11048927 0 U NIVERSITY OF T ECHNOLOGY S YDNEY fluid mechanics-project-blood pump
Fluid Mechanics-Project-Blood Pump Abstract This paper examines the application of fluid mechanics to blood pumps for humans including; background, development, human blood as fluids, blood and water pump comparison, fluid mechanics issues, application of fluid mechanics, reliability, blood damage, and a comparison of key aspects pertaining to blood pumps of different designs and types. 1
Fluid Mechanics-Project-Blood Pump Contents Abstract ................................................................................................................................................. 1 Introduction ........................................................................................................................................... 3 Background and development of the blood pump ................................................................................ 4 Source: Olsen, D., Artificial Organs , “The History of Continuous-flow blood Pumps; Jun2000, Vol. 24 Issue 6, pp401-404, USA ........................................................................................................................ 6 Human blood as a fluid .......................................................................................................................... 6 Blood pumps versus water pumps ......................................................................................................... 8 Issues associated with fluid mechanics that are dealt with in blood pumps and their significance ....... 9 Length of the pipe: ............................................................................................................................ 9 Stiffness of the fluid: ........................................................................................................................ 10 Diameter of the pipes: ..................................................................................................................... 10 Clearance of the pump: ................................................................................................................... 10 Speed of the pump: ......................................................................................................................... 10 Cardiac output: ................................................................................................................................ 10 Size of the pump: ............................................................................................................................. 10 Volume of the blood: ....................................................................................................................... 10 Reliability ............................................................................................................................................. 11 Issues of blood damage and blood clot ............................................................................................... 11 Application of fluid mechanics to solve problems associated with blood pumps ................................ 11 Haemolysis ...................................................................................................................................... 11 Coagulation ...................................................................................................................................... 12 Current Research and Future Direction ........................................................................................... 12 Comparison of different blood pump designs and types ..................................................................... 12 Conclusion ........................................................................................................................................... 15 References ........................................................................................................................................... 15 2
Fluid Mechanics-Project-Blood Pump Introduction The human heart is essential for humanity to survive and is required to sustain a healthy long life. It is an organ that provides a continuous blood circulation throughout the body to help supply oxygen to different organs and tissues. The brain is one main organ that requires constant oxygen rich blood flow otherwise it will not survive. When a human heart is affected by disease or various heart conditions it can become less effective and can have an impact on overall health. At this stage, the current heart can no longer keep the body healthy and needs to be replaced. The two options are: Heart transplant (human heart) Artificial heart transplant (blood pump) Heart transplants use a human heart and can be very hard to find a match due to donor heart availability. Individuals can spend a great amount of time on a waiting list and on occasions may even die waiting. The invention of the artificial heart has replace the need for waiting and give people a better chance of living a healthy life. There are two types of artificial blood pumps: Kinetic pumps-(centrifugal) Positive displacement pumps-(rotary/reciprocating) Kinetic pumps-(centrifugal) The pumping action is created by kinetic energy being added to the fluid through the force of rotation of an impeller. They are magnetically driven to produce a pressure difference between the inlet and outlet.

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