In-vivo measurements of blood flow velocity profiles in canine ilio-femoral anastomotic bypass grafts.

In-vivo measurements of blood flow velocity profiles in canine ilio-femoral anastomotic bypass grafts.
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犬髂股动脉吻合旁路移植物血流速度分布的体内测量。

DOI:
10.1115/1.2796061
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发表时间:
1997
期刊:
Journal of biomechanical engineering
影响因子:
--
通讯作者:
Tsujioka,K
Tsujioka,K
中科院分区:
--
文献类型:
--
作者:
Jones,SA;Giddens,DP;Loth,F;Zarins,CK;Kajiya,F;Morita,I;Hiramatsu,O;Ogasawara,Y;Tsujioka,K

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用20 MHz,80通道脉冲多普勒超声速度计记录犬端侧髂股吻合移植物的体内速度分布。从吻合区域的铸件获得几何形状,并使用电磁流量探头测量流速。这里报告的三个病例包括一个“标准”几何形状,这与以前研究的体外模型相似,一个狭窄的几何形状,以及一个低于平均流速的病例。观察到的流动特征包括发动机罩和趾部处的分离、底部驻点的移动以及近端流出段中的偏斜剖面。吻合口的平面外曲率和侧向位移似乎对流场有很大的影响。此外,顺应性影响近端和远端分支内的瞬时流速。
In-vivo velocity profiles were recorded with a 20 MHz, 80-channel pulsed Doppler ultrasound velocimeter in canine end-to-side ilio-femoral anastomotic grafts. The geometries were obtained from casts of the anastomotic region, and flow rates were measured with electromagnetic flow probes. Three cases reported here include a “standard” geometry, which was similar to previously studied in vitro models, a stenosed geometry, and a case with below average flow rate. Observed flow features include separation at the hood and toe, movement of the floor stagnation point, and skewed profiles in the proximal outflow segment. Out-of-plane curvature and lateral displacement of the anastomosis inlet appear to have a strong effect on the flow fields. In addition, compliance affects the instantaneous flow rates within the proximal and distal branches.
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