A numerical study on the effect of hematocrit on hemodynamic characteristics in arteriovenous graft
- Authors
- Kim, Ji Tae; Sung, Kun Hyuk; Ryou, Hong Sun
- Issue Date
- Aug-2014
- Publisher
- KOREAN SOC RHEOLOGY
- Keywords
- hematocrit; arteriovenous graft; computational fluid dynamics; hemodialysis; viscosity
- Citation
- KOREA-AUSTRALIA RHEOLOGY JOURNAL, v.26, no.3, pp 327 - 334
- Pages
- 8
- Journal Title
- KOREA-AUSTRALIA RHEOLOGY JOURNAL
- Volume
- 26
- Number
- 3
- Start Page
- 327
- End Page
- 334
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/12004
- DOI
- 10.1007/s13367-014-0037-x
- ISSN
- 1226-119X
2093-7660
- Abstract
- Stenosis at an arteriovenous graft is related with the critical ranges of hemodynamic characteristics. Hematocrit has a significant effect on the blood viscosity. During hemodialysis, hematocrit is changed by the dialysis machine. The effect of hematocrit on hemodynamic characteristics is investigated by numerical study. A multiphase non-Newtonian blood model was used to analyze the changes of hematocrit. The hematocrit of blood flows at injection needle changed 40%, 50%, and 60%. As a result, the blood viscosity increased by about 6% point. Also, the high wall shear stress region (over 3 Pa) increased about 6% point when the hematocrit at the vein anastomosis increased by about 2% point. When the hematocrit increased by 4% at the vein anastomosis, an extremely high wall shear stress region (over 7.5 Pa) increased by 3 times. Thus, the variation of hematocrit should be predicted using a multiphase blood model to avoid the critical range of wall shear stress when hematocrit changes regionally.
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Collections - College of Engineering > School of Mechanical Engineering > 1. Journal Articles
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