title: Computer simulation of flow and mixing at the duodenal stump after gastric resection.
abstract: OBJECTIVE
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: Faculty of Mechanical Engineering, University of Kragujevac, S Janjica 6, Kragujevac, Serbia. fica@kg.ac.rs
authors.forename: Nenad
authors.initials: N
authors.lastname: Filipovic
authors.forename: Aleksandar
authors.initials: A
authors.lastname: Cvetkovic
authors.forename: Velibor
authors.initials: V
authors.lastname: Isailovic
authors.forename: Zoran
authors.initials: Z
authors.lastname: Matovic
authors.forename: Mirko
authors.initials: M
authors.lastname: Rosic
authors.forename: Milos
authors.initials: M
authors.lastname: Kojic
mesh_terms: D003198:Computer Simulation; D004386:Duodenum / Q000033:anatomy & histology / Q000378:metabolism / Q000601:surgery*; D005743:Gastrectomy / Q000009:adverse effects / Q000379:methods; D005763:Gastroenterostomy; D006801:Humans; D008365:Manometry / Q000295:instrumentation / Q000379:methods; D010919:Placebos; D011312:Pressure; D011446:Prospective Studies
chemical_list: D010919:Placebos