Numerical analysis of the influence of a change in the vertebral arteries joint angle on the blood flow

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Numerical analysis of the influence of a change in the vertebral arteries joint angle on the blood flow

Krzysztof Jozwik, Damian Obidowski, Maciej Pogorzelski

Medical Apparatus Division, Institute of Turbomachinery,,Technical University of Lodz, Lodz, Poland.

DOI:

https://doi.org/10.7494/cmms.2009.1.0209

Abstract:

Cerebral circulation can be regarded as the most important element of blood circulation. Total ischaemia of neurotic cells, lasting longer than a few minutes, is irreversible in its consequences and results in their death. Due to that fact, blood must be constantly delivered to this region of human body. The primary system of brain blood supply consists of independent systems of two carotid and vertebral arteries. Vertebral arteries join into a basilar artery. This joint has a specific character as only 2% of all nodes are vessel joints. Moreover, due to its spatial shape, various diameters of inner vessels, various lengths, as well as various joint angles become an area of interesting research. Because of a lack of opportunity in direct diagnosis of this area, numerical experiments on average combinations of geometric models have been carried out. To conduct these investigations, two 3D models of the artery system differing in the value of the joint angle of vertebral arteries and the basilar artery, starting with the aortic ostium and finishing with the basilar artery have been generated. At the inlet to the system, three different velocities of the liquid modelling blood have been applied one by one. The results of the simulation indicate the way the joint angle and velocity change at the inlet influences the character and velocity of the flow in the area under analysis. Also, they clearly show which angle would be better from the view point of the flow hemodynamics.

Cite as:

Jozwik, K., Obidowski, D., & Pogorzelski, M. (2009). Numerical analysis of the influence of a change in the vertebral arteries joint angle on the blood flow. Computer Methods in Materials Science, 9(1), 72 – 78. https://doi.org/10.7494/cmms.2009.1.0209

Article (PDF):

Keywords:

Vertebral arteries, Blood flow, Computational fluid dynamics, Human vascular system

References:

Ansys CFX reference book 2007.

Berguer, R., Kieffer, E., Surgery of the Arteries to the Head. Springer-Verlag, New York, 1992.

Bochenek, A., Reicher, M., Anatomia człowieka, tom III, Państwowy Zakład Wydawnictw Lekarskich, wyd. V, Warszawa, 1974 (in Polish).

Boyajian, R., A., Otis, S., M., The Relative Contributions of the Anterior and Posterior Circulations to Global Cerebral Blood Flow, Stroke 31, 2000, 1194.

Cieślicki, K., Hydrodynamiczne uwarunkowania krążenia mózgowego, Akademicka Oficyna Wydawnicza EXIT, Warszawa, 2001 (in Polish).

Dorobisz, A., Leczenie niewydolności tętniczej kregowopodstawnej, Pol. Przegl. Chir., 67, 1995, 462 (in Polish).

Fung, Y., C., Biomechanics, Circulation, Springer-Verlag, 1997.

Johnson, B., M., Johnson, P., R., Corney, S., Kilpatrick, D., Non-Newtonian Blood Flow in Human Right Coronary Arteries, Steady State Simulations, J. Biomechanics, 37, 2004, 709-720.

Konturek, S., Fizjologia człowieka, tom II Układ krążenia, WUJ, Kraków, 2001 (in Polish).

Kowalewski, T., Blood Flow Modelling and Diagnostics, Advanced Course and Workshop, Warszawa, 2005.

Köpf-Maier, P., Wolfa Heideggera-Atlas anatomii człowieka – tom 2, PZWL, Warszawa, 2000 (in Polish).

Obidowski, D., Symulacja przepływu krwi przez tętnice kręgowe człowieka, PhD thesis, Technical University of Lodz, Lodz, 2007 (in Polish).

Seidel, E., Eicke, B.,M., Tettenborn, B., References Values for Vertebral Artery Flow Volume by Duplex Sonography in Young and Elderly Adults, Stroke, 30, 1999, 2692.

Traczyk, W., Trzebski, A., Fizjologia człowieka z elementami fizjologii stosowanej i klinicznej, PZWL, Warszawa, 2001 (in Polish).