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A model of blood interaction with optical-fluid guide for laser angioplasty

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Abstract

A mathematical model is developed to describe the flow and mixing of blood and optical fluid used in liquid-guided light for laser angioplasty. The model is based on a two-fluid formulation in which separate transport equations are solved for the blood and the optical fluid. Empirical relations, established in prior work, are used to represent interfluid transport of momentum. Both steady and phasic inflow conditions are considered. Parametric calculations are performed showing effect of relative flow rates of blood and optical fluid, on the mixing phenomena. The relative velocity considered (based on average blood velocity) ranged from 0.08 to 0.28 m/sec. No allowance has been made for ablation of the plaque. The predicted results include spatial distribution of the velocity field and the existence probabilities (volume fractions) that provide a measure of the extent of mixing between the fluids. It is found that the degree of mixing is adversely affected by the relative inflow velocity between blood and optical fluid and the pulsatility of blood inflow. Deep penetration of the optical fluid is predicted at high relative velocity and at the end of diastolic and early systolic stages of the cardiac cycle.

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Authors and Affiliations

  1. Department of Mechanical, Industrial, and Manufacturing Engineering, Northeastern University, 360 Huntington Avenue, 02115, Boston, MA, USA

    Olusegun J. Ilegbusi & Victor A. Nosovitsky

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  1. Olusegun J. Ilegbusi
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  2. Victor A. Nosovitsky
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Ilegbusi, O.J., Nosovitsky, V.A. A model of blood interaction with optical-fluid guide for laser angioplasty. Ann Biomed Eng 25, 653–664 (1997). https://doi.org/10.1007/BF02684843

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  • DOI: https://doi.org/10.1007/BF02684843

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