Stone cone

All surgeries were performed by the same surgeon, and the assistants were from the same treatment team. Conventional tracheal intubation or laryngeal mask general anesthesia was adopted, with the patients in the lithotomy position. A WOLF F8/9.8 ureteroscope was used to enter the bladder under direct vision, and a super-slip guidewire (Boston Scientific, ZIP wire) was placed retrograde into the affected ureter under ureteroscopic observation with the patient in a head-high, foot-low position. The ureteroscope was then inserted forward under the guidance of the guidewire. The UreTron or holmium laser apparatus was used for the lithotripsy to find the calculi, with the powder from the UreTron lithotripsy aspirated into a collection bottle. An interceptor basket (Boston Scientific, Stone Cone) was used to block the proximal displacement of the stone as appropriate. In the case of stone displacement into the pelvis and calyces, which prevented further lithotripsy, a flexible ureteroscope (POLYDIAGNOST or Olympus URF-V) was adopted to assist (all with the holmium laser apparatus), and a mesh basket (Boston Scientific, Zero TIP) was used as appropriate. After the lithotripsy, a ureteral stent tube (Boston Scientific, Polaris Loop, 6 F × 24 cm) was routinely placed and retained for four weeks, and a urinary catheter was placed and retained for three days.