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

Nenad Filipovic, Aleksandar Cvetkovic, Velibor Isailovic, Zoran Matovic, Mirko Rosic, Milos Kojic

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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? 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.

Original languageEnglish (US)
Pages (from-to)1990-1998
Number of pages9
JournalWorld Journal of Gastroenterology
Issue number16
StatePublished - Apr 28 2009


  • Billroth II
  • Computer simulation
  • Duodenal stump
  • Gastric resection
  • Pressure distribution

ASJC Scopus subject areas

  • Gastroenterology


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