Velocity pulse measurements in the mesenteric arterioles of rabbits.
Velocity pulse measurements in the mesenteric arterioles of rabbits.
复制标题
兔子肠系膜小动脉的速度脉冲测量。
DOI：
10.1088/0967-3334/25/1/002
复制
发表时间：
2004
影响因子：
3.2
通讯作者：
Aphroditi Pogiatzi
中科院分区：
文献类型：
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作者：
A. Koutsiaris;Aphroditi Pogiatzi
通过高速视频显微镜方法，使用红细胞在微血管轴附近移动的图像，在整个周期内量化轴向红细胞速度脉冲。在6只家兔的10条肠系膜毛细血管前小动脉（直径8 ~ 12 μ m）中，轴向速度范围为0.46（舒张末期最小值）~ 4.8 mm·s（-1）（收缩期最大值）。利用适当量化的速度脉冲形状，可以对随时间的平均速度进行正确估计，并且因此对血流进行适当量化。平均流速范围为1.14 mm s（-1）（8微动脉）和1.98 mm s（-1）（9微动脉）。此外，在已知速度脉冲形状的情况下，可以通过在微血管血液动力学（直径小于15微米）中引入Pourcelot阻力指数（RI）来估计脉动的幅度。结果表明，毛细血管前小动脉的阻力指数很高，在0.56（8 μ m）~ 0.74（12 μ m）之间。通过观察不同直径下的速度脉冲图，首次获得了关于速度脉冲在进入毛细管床时形状如何变化的定量信息。
The axial red blood cell velocity pulse was quantified throughout its period by a high-speed video microscopy method, using images of erythrocytes moving near the microvessel axis. In 10 mesenteric precapillary arterioles (8 to 12 microm in diameter) from six rabbits, axial velocities ranged from 0.46 (the minimum of all the end diastolic values) to 4.8 mm s(-1) (the maximum of all the peak systolic values). With the velocity pulse shape properly quantified, a correct estimation of the average velocity over time can be made and hence, appropriate quantification of blood flow. Average velocity ranged between 1.14 mm s(-1) (8 microm arterioles) and 1.98 mm s(-1) (9 microm arterioles). Also, with the velocity pulse shape known, an estimation of the magnitude of the pulsation can be made by introducing Pourcelot's resistive index (RI) in the microvascular haemodynamics (diameter less than 15 microm). The results of this study reveal that RI in the precapillary arterioles is quite high ranging between 0.56 (8 microm arterioles) and 0.74 (12 microm arterioles). Observing the velocity pulse diagrams in different diameters, quantitative information is obtained for the first time on how the velocity pulse shape flattens as it proceeds to the capillary bed.
影响因子：
2.9
作者：
Silverman,RonaldH;Ursea,Roxana;Kruse,Dustin;Ferrara,KatherineW;Rondeau,MarkJ;Coleman,DJackson
通讯作者：
Coleman,DJackson
影响因子：
--
作者：
KOLLER, A;KALEY, G
通讯作者：
KALEY, G