[Features of hydrodinamics in drainage of the upper urinary tract (experimental study)].

The present article is devoted to the search for the physical factors affecting the intrapelvic pressure in patients with kidney catheters. Based on mathematical prediction and experiment, value of air bubbles, hampering urine outflow and contributing to the development of purulent postoperative complications in urology, was demonstrated. A certain number of air bubbles in catheters leads to the formation of air-urinary impaction, causing a sharp increase of intrapelvic pressure.