THE PHYSICAL AND MATHEMATICAL MODEL OF INTRATHORACIC STOMACH USED FOR ESOPHAGOGASTROPLAS TY: BASIC PRINCIPLES AND METHOD OF MATHEMATIC MODELING

There are limited data that can explain how food transports through the intrathoracis stomach that is used for esophageal resection. Bilateral vagotomy and partial sympathectomy make the stomach transplant act as an inert tube; although, food moves there only by the gravitation force. Regarding to this, I have made the physical and mathematical model of intrathoracic stomach to determine required terms for transportation of food of various consistency. The model distinguishes roles of the size of stomach implant and performance of the pylor-draining operations; and their effects on the efficiency of food transportation. Using the basic model of stomach (with a diameter 60 mm), I observed water and glycerin transportation though the pyloric canal model/simulator with width of 3.5 mm, 7 mm and 14 mm. I have pointed out that the term of water transportation though the pyloric canal (with width 14 mm) was the shortest. This fact is statistically reliable comparing with the canal width of 7 mm and 3.5 mm. The term of glycerin transportation is significantly higher comparing to water transportation though the model; even despite the width of pyloric canal. The research results confirmed necessity of pylor-draining operations for esophagogastroplasty.