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Computer simulation of flow and mixing at the duodenal stump after gastric resection

World Journal of Gastroenterology 2009年第16期15卷 1990-1998页

作者： nenad filipovic Aleksandar Cvetkovic Velibor Isailovic Zoran Matovic Mirko Rosic Milos Kojic Faculty of Mechanical Engineering University of Kragujevac Research and Development Center for Bioengineering Harvard School of Public Health Clinical Center Kragujevac Medical Faculty Kragujevac The University of Texas Health Science Center

AIM： To investigate the flow and mixing at the duodenal stump after gastric resection, a computer simulation was implemented. METHODS： Using the finite element method, two different Billroth fl procedure cases （A and B） were modeled. Case A was defined with a shorter and almost straight duodenal section, while case B has a much longer and curved duodenal section. Velocity, pressure and food concentration distribution were determined and the numerical results were compared with experimental observations. RESULTS： The pressure distribution obtained by numerical simulation was in the range of the recorded experimental results. Case A had a more favorable pressure distribution in comparison with case B. However, case B had better performance in terms of food transport because of more continual food distribution, as well as better emptying of the duodena section. CONCLUSION： This study offers insight into the transport process within the duodenal stump section after surgical intervention, which can be useful for future patient-specific predictions of a surgical outcome.

关键词： Computer simulation Gastric resection Duodenal stump Billroth rl Pressure distribution

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