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Numerical study on the effect of separate cannulation method on hemodynamics in an arteriovenous graft

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Abstract

Generally, the hemodialysis patient with the prosthetic arteriovenous graft (AVG) undergoes two punctures with needles on the graft in every dialysis session. As an alternative method for patients with AVGs, clinicians and nurses often return the blood filtered by a dialysis machine to an autologous vein not the graft, and that is defined as a separate cannulation method. In this study, we numerically evaluate the influence of the separate cannulation method on the hemodynamics by using clinical information of six patients. In the results, when the separate cannulation method is used, the low time-averaged wall shear stress region increases whereas the high oscillatory shear index region decreases at the venous anastomosis and proximal vein. The quantitative analysis using hemodynamic index indicates the separated cannulation method has pros and cons on the occurrence of complications in AVGs.

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Correspondence to Hong Sun Ryou.

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Recommended by Associate Editor Won Hyoung Ryu

Kun Hyuk Sung obtained his B.S. and M.S. degrees in Mechanical Engineering, Chung-Ang University, Seoul, Korea in 2008 and 2013, respectively. He is a Ph.D. candidate in School of Mechanical Engineering at Chung-Ang University, Seoul, Korea.

Hyangkyoung Kim obtained her B.S. degree in Medicine from Pusan National. University. She obtained M.S. and Ph.D. degrees in Medicine from Ulsan University. She is a professor of Medicine in Chung-Ang University Hospital, Seoul, Korea.

Hong Sun Ryou obtained his B.S. and M.S. degrees in Aeronautical Engineering from Seoul National University. He obtained Ph.D. degree in Aeronautics from Imperial College, London, UK. He is a professor in School of Mechanical Engineering, Chung-Ang University, Seoul, Korea.

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Sung, K.H., Kim, H. & Ryou, H.S. Numerical study on the effect of separate cannulation method on hemodynamics in an arteriovenous graft. J Mech Sci Technol 30, 963–970 (2016). https://doi.org/10.1007/s12206-016-0151-4

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  • DOI: https://doi.org/10.1007/s12206-016-0151-4

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