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Novel straight type aortic cannula with spiral flow inducing design

Darlis, Nofrizalidris and Shafii, Nadia Shaira and Dillon, Jeswant and Osman, Kahar and Md. Khudzari, Ahmad Zahran (2015) Novel straight type aortic cannula with spiral flow inducing design. In: Applied Mechanics and Materials, 2015.

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Official URL: https://www.scientific.net/AMM.773-774.69

Abstract

Aortic cannula is one of major factors leading to adverse events such as thrombosis and atherosclerosis development during open heart surgery. This is due to oxygenated blood outflow with high velocity jet from heart lung machine when exiting the cannula tip into ascending aorta. It was discovered, and validated by several researchers that blood flow out of the left ventricle into the aorta is spiral in nature. In this study, a novel design in which internal profile of the cannula was made to induce spiral flow were tested by way of numerical simulation, and compared against existing commercial cannula. Three designs were tested, which differed in number of groove employed. Among the cannula model designs, cannula design with 4 grooves yielded the lowest value of maximum wall shear stress at testing tube with 3.778 Pa and highest value of area weighted helicity density at 40 mm from cannula tips with 11.829 m/s2. Overall, spiral cannula models were showed highly potential in inducing spiral flow, and also the effect on blood hemolysis is acceptable.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:aortic cannula design, arterial cannulation
Subjects:T Technology > TN Mining engineering. Metallurgy
Divisions:Mechanical Engineering
ID Code:60584
Deposited By: Widya Wahid
Deposited On:22 Feb 2017 16:01
Last Modified:16 Aug 2017 15:46

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