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Computer simulation of flow and mixing at the duodenal stump after gastric resection
Nenad Filipovic1, Aleksandar Cvetkovic, Velibor Isailovic
1Faculty of Mechanical Engineering, University of Kragujevac, S Janjica 6, Kragujevac, Serbia. fica@kg.ac.rs
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 II 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 duodenal 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.
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