Comparison by computerized numeric modeling of energy losses in different Fontan connections.
Comparison by computerized numeric modeling of energy losses in different Fontan connections.
复制标题
通过计算机数值模型对不同 Fontan 连接中的能量损失进行比较。
DOI：
10.1161/01.cir.92.9.322
复制
发表时间：
1995
期刊：
影响因子：
37.8
通讯作者：
Marc Gewillig
中科院分区：
文献类型：
--
作者：
Jean;Luc Mertens;Renaud Sizaire;Gilberto Montas;B. Purnode;Wim Daenen;Marcel Crochet;Marc Gewillig
BACKGROUND
Different surgical techniques for creating a Fontan circulation can be used. The option of including an atrium in the circuit, or the technique used for connecting the caval veins to the pulmonary artery in a total cavopulmonary connection, frequently is empirical and is based on personal experience and preference. The hemodynamic and energetic differences between the different circuits are small, and short-term results are comparable. However, small, energetic differences may have significant implications for the long-term follow-up. The finite element method allows a computer-based modeling of the flow dynamics and pressure losses. It permits comparison of different Fontan connections in a single patient with identical geometry and functional conditions.
METHODS AND RESULTS
We compared the atriopulmonary connection with different types of cavopulmonary connections, which differed in the degree of symmetry of implantation of both caval veins into the right pulmonary artery. Based on anatomic models and physiological flow dynamics, three-dimensional geometries and finite element meshes were created with PATRAN; flows were calculated with POLYFLOW (B), and results were visualized with DATA VISUALIZER.
CONCLUSIONS
The atriopulmonary connection produces higher energy losses than the cavopulmonary connection (+/- 1 mm Hg at rest). The cavopulmonary connection is more efficient when the connection of the caval veins to the pulmonary artery is asymmetrical.
