Late Diagnosis of Urinary Peritonitis Due to a Lesion of the Left Ureter During Laparoscopic Anterior Resection of the Rectum—Laparoscopic Solution. Clinical Case and Literature Review

Ureteral lesions are a rare complication of colorectal surgery. This type of surgical procedure is the second most common cause of such complications, second only to gynecological operations, which account for around 50%. According to the localization of the lesion, they аre grouped into three types: injury to the proximal, middle, and distal part of the ureter, with the latter being the most common—around 80–90%. Most of the lesions are not recognized intraoperatively and sometimes the diagnosis can be delayed significantly. The time of diagnosis and the localization of the injury are crucial to the choice of treatment. We present a case of a patient, with a late diagnosis of lesion of the left ureter after the laparoscopic anterior resection of the rectum, which was treated with a laparoscopic uretero-ureteral anastomosis with simultaneous double-J catheterization. We also present a short literature review on the subject

Regulation of traffic flows by railway stations with a change in the number of main tracks on the hauls

The theory of traffic flows suggests the possibility of using the analogy of handling transport units with hydraulic and other streaming processes. Railway stations, by analogy with HPPs, can be considered as compensation tanks, which ensure smoothing of fluctuations of the flows of transport units. The number of main tracks on the hauls affects the intensity and other parameters of traffic flows, which should be taken into account in calculating the track development of stations. The use of analogies with hydraulic flows allows proposing new methods for calculating the required capacity of compensating accumulators, i.e. track development of stations. In this regard, it is urgent to develop methods for correcting the calculation of the track development of stations in conditions of a change in the number of main tracks on the hauls. The purpose of the study was to develop a method for estimating the load at a station and the magnitude of the corresponding track development in conditions of a change in the number of main tracks on the hauls. The methods of simulation modeling and mathematical statistics are used. The result of the study will be a method for correcting the calculation of the track development of technical railway stations with a change in the number of main tracks on the hauls, as well as recommendations for estimating the stability of train traffic passing