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TECHNICAL PAPERS

Low Background, Pulsatile, In Vitro Flow Circuit for Modeling Coronary Implant Thrombosis

[+] Author and Article Information
Kumaran Kolandaivelu

Harvard-MIT Division of Health Science and Technology, Massachusetts Institute of Technology, 77 Massachusetts Ave. Bldg 16-343, Cambridge, MA 02139  

Elazer R. Edelman

Harvard-MIT Division of Health Science and Technology, Massachusetts Institute of Technology, 77 Massachusetts Ave. Bld 16-343, Cambridge, MA 02139Cardiovascular Division, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, 75 Francis St., Boston, MA 02115

J Biomech Eng 124(6), 662-668 (Dec 27, 2002) (7 pages) doi:10.1115/1.1517062 History: Received April 01, 2001; Revised June 01, 2002; Online December 27, 2002
Copyright © 2002 by ASME
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Figures

Grahic Jump Location
General system schematic
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Embodied fluid loop design and dimensions; (a) Fluid loop; (b) cross-sectional view through a fitting. The three equally spaced fittings were positioned to minimally disrupt the loop curvature. One fitting serves as a connector to create the fluid loop by securely holding the two ends of the tubing length in apposition. The two other fittings serve as inlet and outlet ports for the injection of fluid.
Grahic Jump Location
Impulsive fluidic response to a step in rotor velocity
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Sample flow profiles depicting some of the possibilities achievable with this type of flow generation; (a) Square; (b) Triangular; (c) Sinusoidal
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Modeled coronary profiles; (a) Typical left anterior descending coronary flow pattern superimposed on the modeled, bi-directional, coronary-type flow profile; (b) The wall, Vwall, and fluid, Vfluid, velocities in the inertial reference frame required to drive the relative coronary flow velocity, Vrel. Note that Vrel is essentially zero by the time Vwall initiates a new cycle.
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Occlusion time trial for 6 stainless steel 7-9 NIR® stented loops
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Occlusion time trial depicting 3 stainless steel 7-9 NIR® stented loops (in blue) and 3 stentless control loops (in green)

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