Arteriovenous Graft Modeling and Hemodynamic Interpretation

Hyoung-Ho Kim, Young Ho Choi, Sang-Ho Suh, Jeong Sang Lee, Young Hoon Jung, Young Ho So

Department of Mechanical Engineering, Soongsil University, Seoul, South Korea.
Department of Radiology, Seoul National University Boramae Hospital, Seoul, South Korea.
Department of Thoracic and Cardiovascular Surgery, Seoul National University Boramae Hospital, Seoul, South Korea.

DOI: 10.4236/ojfd.2012.24A040                

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.

Keywords

Ateriovenous Fistula; Bypass Graft; Hemodynamic Interpretation; Numerical Analysis

Conflicts of Interest

The authors declare no conflicts of interest.

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