Abstract
Whether the antegrade pulmonary blood flow (APBF) should be preserved or not at the time of bidirectional cavo-pulmonary anastomosis (BCPA) is controversial in the management of patients with single-ventricle physiology. In this study, we attempted to investigate the fluid dynamic features of this kind of connection using computational fluid dynamics (CFD) and tried to provide some useful information for better understanding of this issue. The patient-specific three-dimensional geometry of a BCPA with native pulmonary artery (PA) trunk was reconstructed according to the computer tomography (CT) scans. Transient simulations were performed at three predetermined levels of pulsatile APBF. Results showed that during one cardiac cycle, the flow ratio of left pulmonary artery (LPA)/right pulmonary artery (RPA) was 1.91 when the average APBF was 0.5L/min and the ratio increased to 2.06 and 2.46 respectively at the level of 1L/min and 1.5L/min. Moreover, mass flow rate of the RPA at the end of the systolic period approached nearer to zero at the average APBF level of 1.5L/min than at the levels of 0.5L/min and 1L/min. The amplitude of static pressures in LPA, RPA and superior vena cava (SVC) during one cardiac cycle was bigger as the amount of APBF increased. We concluded that in this patient-specific three-dimensional BCPA with APBF connection, as the amount of APBF increased, the flow ratio of LPA/RPA became larger and the mass flow rate of RPA at the end of the systolic period approached nearer to zero. Though the pulsatility of the static pressures in LPA, RPA and SVC became more prominent as the amount of APBF increased, the mean static pressures in them remained stable.
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Sun, Q. et al. (2008). Numerical Simulation of A Bidirectional Cavopulmonary Anastomosis Connection with Antegrade Pulmonary Blood Flow. In: Peng, Y., Weng, X. (eds) 7th Asian-Pacific Conference on Medical and Biological Engineering. IFMBE Proceedings, vol 19. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-79039-6_36
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DOI: https://doi.org/10.1007/978-3-540-79039-6_36
Publisher Name: Springer, Berlin, Heidelberg
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