1935 IS THE EFFICACY OF FLEXIBLE URETERORENOSCOPY (FURS) DEPENDING ON STONE LOCALISATION

erative, intra-operative, and post-operative parameters were recorded via a standardized methodology. RESULTS: Twelve patients were identified with a calculus in the transplant renal unit and/or ureter that required intervention (see Table 1). For retrograde procedures (7), access to the ureteral orifice was facilitated by the use of a Kumpe catheter; a two wire technique was employed, and ureteral access sheaths were not used. For antegrade procedures (5), the ureteroscope was passed into the kidney using a two wire technique without tract dilation. All stones but one required Ho:YAG laser lithotripsy with extraction of stone fragments, and stents were placed in all cases. All patients were stone-free on post-operative imaging (8 confirmed by renal ultrasound, 2 by CT, 1 by nephrostogram). Stone analysis included CaOx (6), CaPhos (4), and struvite (1). No perioperative complications were encountered. CONCLUSIONS: Antegrade and retrograde URS are safe and effective treatments for patients with simple stone burdens in a transplant kidney. Although retrograde access to the ureter can be challenging, specialized techniques and modern endoscope technology facilitate this process. Antegrade URS for small stone burdens can be performed without tract dilation.