Ureteral lithotripsy

There is a certain risk in basket lithography, and the operator must follow certain rules to reduce the risk. ①The width of the stones must be less than 0.5cm; ②Limited to the stones of the lower ureter; ③The period is less than 3 months. The hoop should be: ① pull the outer sheath to open the hoop; ② the hoop should be fully opened when in use. Not possible: ① Close the basket inside the ureter: ② Pull the collar or basket.