X-ray study of kidney and upper urinary tract in internal drainage and after stent removal in the experiment

Internal ureteral stent is widely used in reconstructive urology and radical oncourology. Immune response to stent — a major cause of surgical complications. The development of new materials and coatings will improve bioinert properties of stents and reduce the incidence of complications. Rate X-ray physiology kidney and upper urinary tract, depending on the use of drainage, duration of drainage and timing of passed since the stent was removed in the experiment. X-ray physiology stented kidney was studied in 15 male rabbits breed the “Gray giant” mass of 4350—4580 grams. All animals were fitted both stent. In the left ureter an experimental stent was implanted, in the right as an internal control — polyurethane one of similar diameter. In the pre-and postoperative period X-ray computed tomography by “Philips” tomograph, excretory urography and X-ray cystometria by angiographic complex «Omega Digital Cath» were performed. The use of internal polyurethane stents in the experiment up to a month led to stent obstruction by urinary salts. In the control group noted the frequent development of obstructive uropathy of the stented kidney. Using an experimental stent did not cause violations of the outflow of urine. The original cover of the experimental stent prevents the crystallization of urinary salts on the stent surface. After removal of the polyurethane stent renal dysfunction persisted throughout the observation period. In the main experimental group such complications were not observed.

ureteral stent, reflux, obstruction, pyelonephritis