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TECHNICAL PAPERS

Computational Fluid Dynamics Simulations in Realistic 3-D Geometries of the Total Cavopulmonary Anastomosis: The Influence of the Inferior Caval Anastomosis

[+] Author and Article Information
Francesco Migliavacca, Gabriele Dubini

Laboratory of Biological Structure Mechanics, Dept. of Bioengineering and Dept. of Structural Engineering, Politecnico di Milano, Milano, Italy

Edward L. Bove

Section of Cardiac Surgery, The University of Michigan School of Medicine, Ann Arbor, MI, USA

Marc R. de Leval

Cardiothoracic Unit, Great Ormond Street Hospital for Children, London, UK

J Biomech Eng 125(6), 805-813 (Jan 09, 2004) (9 pages) doi:10.1115/1.1632523 History: Received June 17, 2002; Revised August 01, 2003; Online January 09, 2004
Copyright © 2003 by ASME
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References

Figures

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Meshes of TCPC models: Intra-atrial tunnel models with central (IAc), right (IAr), elliptical (IAe) and patch (IAp) inferior anastomosis; Extra-cardiac lateral tunnel models with antero-posterior (EXa) or left (EXl) anastomotic insertion. For the EXa model, a lateral view is depicted which shows the curvature of the extra-cardiac conduit around the heart. SVC and pulmonary arteries are reconstructed from MRI and angiocardiograms 30. Dashed areas represent the inferior anastomotic cross-sections. Bottom right panel: planes used for the evaluation of secondary flows. A: anterior, P: posterior.
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Adopted time functions for the inferior and superior venae cavae. (1 l/min=16.67 cm3 /s) from 22.
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Complete model of the TCPC (EXa design) with porous jump elements at the pulmonary outlets
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Mean dissipated power as a function of the pulmonary arteriolar resistance (PAR). (1 mmHg/(l/min)=80 g/(cm4 ⋅s)).
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Pressure temporal tracings in the last cycle of the simulations at the IVC, SVC, LPA and RPA cross sections for models IAc (top) and IAp (bottom). (1 mmHg=133.32 Pa).
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Velocity maps in three selected planes for all the TCPC designs at the time instant t=0.28 s from the beginning of the cardiac cycle, corresponding to maximum inlet (SVC+IVC) instantaneous volume flow. For the location of the planes, refer to the bottom-right panel of Fig. 1 RPA: right pulmonary artery, LPA: left pulmonary artery. A: anterior, P: posterior. A reference vector is reported at the bottom of the figure.
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Velocity maps in three selected planes for all the TCPC designs at the time instant t=0.55 s from the beginning of the cardiac cycle, corresponding to equal caval inlet (SVC and IVC) instantaneous volume flow. For the location of the planes refer to the bottom right panel of Fig. 1. RPA: right pulmonary artery, LPA: left pulmonary artery. A: anterior, P: posterior. A reference vector is reported at the bottom of the figure.
Grahic Jump Location
Velocity maps in three selected planes for all the TCPC designs at the time instant t=0.69 s from the beginning of the cardiac cycle, which corresponding to the minimum inlet (SVC+IVC) instantaneous volume flow. For the location of the planes refer to the bottom right panel of Fig. 1. RPA: right pulmonary artery, LPA: left pulmonary artery. A: anterior, P: posterior. A reference vector is reported at the bottom of the figure.

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