Introduction. At the present stage information about the structure of the duodenobiliopancreatic complex elements obtained on cadaveric material becomes easier to be confronted with clinical exploration data, especially with the endoscopic, radiological, ultrasonographic and others. By these means there are completedthe results of morphological studies Purpose. Determination of the structural-stereometric relations of the elements of the biliopancreatic junctionon ERCP. Material and methods. There were analyzed 115 radiographs of ERCPP, on which had been established the levels of merging the respective channelswere contained within the limits of the vertebrae L1 – L4. Results. So at the height of the vertebrae L1, this phenomenon occur in 11 (9,56±2,75%) cases (2 (1,7±1,21%) – 1/3 sup. L1, 1 (0,9±0,88%) case – third med., and 8 (6,9±2,36%) cases – third inf. L1). In 70 (60,87±4,55%) cases in the L2 level (26 (22,6±3,90%) – 1/3 med and 34 (29,6±4,26%) – 1/3 lower than L2. In 33 (28,70±4,22%) observations on the the vertebra L3 (third sup. and recovered 23 (20,0±3,73%) cases, the third average – 2 (1,7±1,21%) and third lower – 8 (6,9±2,36%) cases. For the scheletotopic level L4 went one case (0,87±0,87%), the common bile and main pancreatic ducts confluerea occur in the third upper L4 vertebra. Conclusions. Thus, in 89,57±2,85 percent of cases, common bile duct and main pancreatic duct merging (in cases where this process takes place) within the limits of vertebrae L2 and L3. 

Introduction. Physical and mechanical parameters of biological materials has been studied more intensively since the 60-70 of the last century. At the moment, attempts are made to determine areas of weakness of the walls of hollow organs. Researches of this kind are required by rapidly increasing frequency of polytrauma, including the involvement of the organs of the abdominal cavity. Purpose. Determining the location of lesions in the duodenum wall after the experimentally induced baroresistance test. Material and methods. Study material was tested with a – system for establishing the baroresistance of hollow organs. An experimental study was conducted on 25 cases – people aged 21 to 87 years, 19 men and 6 women. Results. Thus, followed the establishment of duodenal wall areas with low baroresistance, where were taken into account portions of the duodenum, the number and length of breaks of the duodenal wall. So, macroscopic accessible tears of the duodenal wall were recorded mainly (32,0±8,52% - 8 observations) in the lower horizontal duodenum (DIII). Tears located within the DII – DIII were detected in 6 (24,0±7,79%) cases. Similar lesions located in the DIII and DIV occurred in 5 (20,0±7,30%) subjects. Isolated lesions of the walls of descending duodenum were found in 3 (12,0±5,93%) cases. Under the action of high pressure in the lumen DI solutions of continuity occurred in two (8,0±4,95%) cases. Isolated rupture at the level of the inferior duodenal flexure was observed in one case (4,0±3,58%). Conclusions. The resistance of human duodenum wall, to a certain extent, trends to reduce in distal direction from DI to DIV. It, also, is conditioned by the direction in which is applied the mechanical stress on the samples under examination – longitudinal or transverse. Evidence shows increased resistance limit to tensions in the longitudinal direction.