Математическое обоснование конструкции двухбаллонного трехканального эндокавального катетера для сосудистой изоляции печени при ее массивных повреждениях методом рентгено-компьютерного моделирования

Abstract

The purpose of the study Was to design a mathematical justification of the three-way double balloon catheter vascular isolation of the liver with its massive traumatic injuries by X-ray computer modeling. Materials and methods The study design consists of four modules: the collection and processing of computer tomograms, information analysis and classification of 3D models, as well as determining lifetime topographic parameters of the inferior vena cava and its tributaries. Results and their discussion As a result of reconstruction simultaneously performed 381 CT examinations of the thoracic and abdominal cavities of patients c intravenous contrast were obtained model the chest and abdomen to the vascular system. The resulting models were divided into three blocks, taking into account the type of constitution. In this study, epigastric angle (between the rib arcs) of less than 85 was considered astenikov °, for epigastric normostenik parameters were determined angle in the interval 85 ° - 95 °, and in hypersthenics - greater than 95 °. Next, simulation was carried Damage hard» (VII-VIII) and hepatic vein segments by marking them. With the help of mathematical processing of the data have been established options anatomical variability of the inferior vena cava and its tributaries. The data obtained with such high accuracy the basic parameters developed catheter as mezhballonnoe distance, the cylinder diameter and width, as well as to establish patterns of variability depending upon the type of the human constitution. Thus, the following results were obtained: 1. regardless of the type of constitution diameter of the cylinder must not exceed 30.0 mm in all given points, the width of the container - 10.0 mm and mezhballonoe distance depends on the type of constitution and astenikov 50 0 mm, normostenik 65.0 mm and 82.0 mm for hypersthenics. Conclusion Based on the findings, it was suggested three variants of the three-way double balloon catheter, taking into account the type of constitution and allow to produce vascular isolation of the liver. In assisting victims with massive damage hard segments of the liver is crucial timely vascular isolation of the liver. Key words Vascular isolation of liver, «hard-to-reach» (VII-VIII) liver segments damage, liver veins damage, X-ray computer simulation