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学科主题: 基础医学
题名:
Velocity profiles of pulsatile blood flow in arterioles with bifurcation and confluence in rat mesnetery measured by particle image velocimetry
作者: Nakano, A; Sugii, Y; Minamiyama, M; Seki, J; Niimi, H
关键词: bifurcation and confluence ; high-speed videomicroscopy ; mesenteric arterioles ; microcirculation ; particle image velocimetry (PlV) ; red blood cell (RBC) ; velocity profile
刊名: JSME INTERNATIONAL JOURNAL SERIES C-MECHANICAL SYSTEMS MACHINE ELEMENTS AND MANUFACTURING
发表日期: 2005-12-01
卷: 48, 期:4, 页:444-452
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Engineering, Manufacturing ; Engineering, Mechanical
研究领域[WOS]: Engineering
关键词[WOS]: RED-CELL VELOCITY ; ENDOTHELIAL SURFACE-LAYER ; CEREBRAL MICROVESSELS ; EPIFLUORESCENCE MICROSCOPY ; RABBIT MESENTERY ; CAPILLARY-FLOW ; PIV TECHNIQUE ; IN-VIVO ; MICROCIRCULATION ; VENULES
英文摘要:

Blood flow velocity profile in microvessels is essential for in vivo studies of substance exchange between blood and tissue. This paper was aimed to investigate the temporal and spatial variations in the velocity profile of red blood cell (RBC) flow in arterioles with both bifurcation and confluence in the rat mesentery, using a particle image velocimetry (PIV). The microcirculation in rat mesentery was observed under a microscopic system with a high-speed digital camera. The images of RBCs flow in microvessels were recorded simultaneously with the arterial blood pressure. Based on the high-speed video images, instantaneous velocity vectors of RBCs in arterioles with bifurcation and confluence were evaluated using a high spatial-resolution PIV algorithm. Then, the time-averaged and ensemble-averaged velocity profiles over the cross-section were calculated from the proximal through the bifurcation to the distal to the confluence. The velocity profile of RBCs showed two peaks at bifurcation and confluence, respectively. The double peaks were most marked at the apex of bifurcation, but not so much marked at the confluence. The variation of centerline velocity showed that the length of vessel under the influence of bifurcation or confluence, was approximately 1.5 times the diameter at the proximal to the apex of bifurcation, but its length was reduced significantly at the distal of confluence.

语种: 英语
WOS记录号: WOS:000235021800008
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/59405
Appears in Collections:基础医学院_北大医学部天士力微循环研究中心_期刊论文

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作者单位: 1.Natl Cardiovasc Ctr, Inst Res, Suita, Osaka 5658565, Japan
2.Univ Tokyo, Dept Quantum Engn & Syst Sci, Bunkyo Ku, Tokyo 1138656, Japan
3.Hiroshima Int Univ, Dept Clin Engn, Higashihiroshima, Hiroshima 7240695, Japan
4.Peking Univ, Hlth Sci Ctr, Tasly Microcirculat Res Ctr, Beijing 100083, Peoples R China

Recommended Citation:
Nakano, A,Sugii, Y,Minamiyama, M,et al. Velocity profiles of pulsatile blood flow in arterioles with bifurcation and confluence in rat mesnetery measured by particle image velocimetry[J]. JSME INTERNATIONAL JOURNAL SERIES C-MECHANICAL SYSTEMS MACHINE ELEMENTS AND MANUFACTURING,2005,48(4):444-452.
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