Surgical Outcomes and Costs in Using the Shenzhen HugeMed 6.3 French Flexible Ureteroscope

Inclusion Criteria: * Males or females ≥ 18 years of age * Patients with ureteral or kidney stones undergoing primary flexible ureteroscopy for retrograde intrarenal surgery * Total stone burden ≤ 2.5 cm Exclusion Criteria: * Undergoing bilateral stone treatment during the same procedure * Patients with known genitourinary anatomical abnormalities that would complicate the procedure as determined by the treating investigator * Uncorrected coagulopathy * Patients with urinary diversions * Chronic external urinary catheters * Women who are pregnant * Immunosuppressed patients * Non-elective procedures * Participants must not be involved in any other clinical research studies during the duration of this trial. Exceptions may be made if the investigator determines, on a case-by-case basis, that participation in another study will not adversely affect the outcomes or integrity of this trial