High-Speed Microcinematographic Studies of Blood Flow in vitro

Bugliarello, George; Hayden, John W.

doi:10.1126/science.138.3544.981

Cited by 44 publications

(14 citation statements)

References 3 publications

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“…This technique was extended to the measurement of red cell velocities over the cross-section of single microvessels (16), (17) . The instantaneous behavior of red cells flowing through microvessels were analyzed by measuring a length of movements of RBCs during consecutive two frames (frame-by-frame method) based on high-speed cinefilms recorded under microscopes with transmitted light (18) - (20) . In recent studies, instead of high-speed microcinematography, a high-speed videomicroscopy has been used (21), (22) .…”

Section: Discussionmentioning

confidence: 99%

Velocity Profiles of Pulsatile Blood Flow in Arterioles with Bifurcation and Confluence in Rat Mesnetery Measured by Particle Image Velocimetry

Nakano¹,

Sugii

Minamiyama

et al. 2005

JSME Int. J., Ser. C

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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.

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Section: Discussionmentioning

confidence: 99%

Velocity Profiles of Pulsatile Blood Flow in Arterioles with Bifurcation and Confluence in Rat Mesnetery Measured by Particle Image Velocimetry

Nakano¹,

Sugii

Minamiyama

et al. 2005

JSME Int. J., Ser. C

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“…It is suggested by both theoretical (Vand, 1948;Jones, 1964;Brunn, 1975;Nuber, 1967;Chaturani and Biswas, 1984) and experimental (Bugliarello and Hayden, 1962;Bennet, 1967) investigations that there exists velocity slip at the flow boundaries (or in their immediate neighbourhood). Recently, Ponalgusamy (2007), Chakraborty (2009, 2010) have developed mathematical models for blood flow through stenosed arterial segment, by taking a velocity slip condition at the constricted wall considering blood as a Newtonian fluid.…”

Section: Introductionmentioning

confidence: 97%

Suspension model blood flow through an inclined tube with an axially non-symmetrical stenosis

Chakraborty

Biswas

Paul

2011

Korea-Aust. Rheol. J.

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The flow of blood in an inclined artery with an axially non-symmetrical but radially symmetrical mild stenosis has been presented in this study. To account for the slip at stenotic wall, hematocrit and inclination of the artery, blood has been represented by a particle-fluid suspension. The expression for the flow characteristics, namely, the impedance (resistance to flow), the wall shear stress and the shear stress at the throat of the stenosis have been derived and represented graphically with respect to different flow parameters. The impedance increases with the hematocrit and stenosis size but decreases with slip at wall and angle of inclination of the artery. The shear stress at the maximum stenosis height increases with the inclination of the artery but possess the characteristics similar to that of impedance with respect to other parameters. As an application, theoretical values of effective viscosity computed with the help of the present analysis are compared with experimental results and found that they are in reasonable agreement for low hematocrit values in small blood carrying vessels.

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“…Beavers and Joseph [31] were the first to investigate the fluid flow at the interface between a porous medium and fluid layer in an experimental study and proposed a slip boundary conditions at the porous interface. In biomedical engineering, when blood flows through an artery slip flow is evident from experimental observations [32,33]. The slip flows under different flow configurations have been studied in recent years [34][35][36][37][38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Impact of thermal radiation on MHD slip flow over a flat plate with variable fluid properties

Das

2011

Heat Mass Transfer

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The influence of partial slip, thermal radiation and temperature dependent fluid properties on the hydromagnetic fluid flow and heat transfer over a flat plate with convective surface heat flux at the boundary and nonuniform heat source/sink is studied. The transverse magnetic field is assumed as a function of the distance from the origin. Also it is assumed that the fluid viscosity and the thermal conductivity vary as an inverse function and linear function of temperature respectively. Using the similarity transformation, the governing system of nonlinear partial differential equations are transformed into similarity non-linear ordinary differential equations and are solved numerically using symbolic software MATHEMATICA 7.0. The numerical values obtained within the boundary layer for the dimensionless velocity, temperature, skin friction coefficient and the Nusselt number are presented through graphs and tables for several sets of values of the parameters. The effects of various physical parameters on the flow and heat transfer characteristics are discussed from the physical point of view.

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High-Speed Microcinematographic Studies of Blood Flow in vitro

Cited by 44 publications

References 3 publications

Velocity Profiles of Pulsatile Blood Flow in Arterioles with Bifurcation and Confluence in Rat Mesnetery Measured by Particle Image Velocimetry

Velocity Profiles of Pulsatile Blood Flow in Arterioles with Bifurcation and Confluence in Rat Mesnetery Measured by Particle Image Velocimetry

Suspension model blood flow through an inclined tube with an axially non-symmetrical stenosis

Impact of thermal radiation on MHD slip flow over a flat plate with variable fluid properties

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