The Significance of Intrarenal Pressures during Upper Tract Endourological Procedures and Its Relation to Postoperative Complications

The safe intrarenal pressures to avoid endourological procedure complications are different in various surgeries, but the most cited pressure in the literature is lower than 30cm H2O. In semi-rigid ureteroscopic procedures use of a smaller-size ureteroscope with continuous flow and avoiding of manual pressure system is recommended. In RIRS surgery with a suction system, larger UAS, and smaller size fURS are recommended. During the miniaturized PCNL approach use of the suction system is strongly recommended. The use of intraluminal drug administration to relax the ureteral muscle is controversial but may be beneficial. According to the shreds of evidence, the IRP and its obvious relation to postoperative complications should be considered an important factor in daily endourology practice.