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Arteriovenous Graft Modeling and Hemodynamic Interpretation

DOI: 10.4236/ojfd.2012.24A040, PP. 324-330

Keywords: Ateriovenous Fistula, Bypass Graft, Hemodynamic Interpretation, Numerical Analysis

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Abstract:

Arteriovenous graft (AVG) is artificially made with graft for hemodialysis in the patients with renal failure. Stenosis in the arterial or venous anastomosis of AVG results in its malfunction. Here, we made an AVG hemodynamic model with three different anastomotic angles (20°, 30°, 40°) and analyzed hemodynamic parameters such as velocity vectors, WSS and OSI in the arterial and venous anastomosis to find what helps in developing new surgical techniques to reduce stenosis in the anastomosis. Recirculation flow, low WSS and high OSI in the venous anastomosis were demonstrated in 30° and 40° models, and recirculation flow, high WSS and high OSI in the arterial anastomosis were shown in all models. Conclusively, higher anastomosis angle in the venous anastomosis cause stenosis, but stenosis in the arterial anastomosis happens irregardless of anastomosis angle.

References

[1]  R. P. Campos, M. M. Do Nascimento, D. C. Chula, D. E. Do Nascimento and M. C. Riella, “Stenosis in Hemo-Dialysis Arteriovenous Fistula: Evaluation and Treatment,” Hemodialysis International, Vol. 10, No. 2, 2006, pp. 152161. doi:10.1111/j.1542-4758.2006.00087.x
[2]  P. Haage and R. W. Günther, “Radiological Intervention to Maintain Vascular Access,” European Journal of Vascular Endovascular Surgery, Vol. 32, No. 1, 2006, pp. 8489. doi:10.1016/j.ejvs.2005.10.004
[3]  L. Turmel-Rodrigues, J. Pengloan and P. Bourquelot, “Interventional Radiology in Hemodialysis Fistulae and Grafts: A Multidisciplinary Approach,” CardioVascular and Interventional Radiology, Vol. 25, No. 1, 2002, pp. 3-16. doi:10.1007/s00270-001-0082-y
[4]  R. Torii, M. Oshima, T. Kobayashi and K. Takagi, “The Hemodynamic Study of the Cerebral Artery Using Numerical Simulation Based on Medical Imaging Data,” Journal of Visualization, Vol. 4, No. 3, 2001, pp. 277284. doi:10.1007/BF03182588
[5]  S. H. Suh, H. H. Kim and J. S. Lee, “Analysis of Bypass Grafting Effects in Stenosed Coronary Arteries,” Proceeding of the KSME Fluids Engineering Division Spring Meeting, Vol. 36, No. 2, 2012, pp. 153-159.
[6]  A. M. Malek, S. L. Alper and S. Izumo, “Hemodynamic Shear Stress and Its Role in Atherosclerosis,” The Journal of the American Medical Association, Vol. 282, No. 21, 1999, pp. 2035-2042. doi:10.1001/jama.282.21.2035

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