Endourology & Stone Disease(구연) (E-152) Single-site robot-assisted reconstructive urologic surgery with the da Vinci SP® system 연세대학과 의과대학 비뇨의학교실¹ 국민건강보험공단 일산병원 비뇨의학과² 허지은¹, 황태현¹, 이종수¹, 강숭구², 최영득¹, 장원식¹ Purpose: The da Vinci SP® system was clinically available in Korea at the end of 2018. This new robotic system enables three double-jointed wristed instruments and a fully wristed three-dimensional camera to be placed through a single port. We presented our experience with single-site robot-assisted reconstructive urology surgery using the SP system and investigate its feasibility. Materials and Methods: From December 2018 to June 2020, a single surgeon performed certain robotic reconstructions in 20 patients, including 12 pyeloplasties, 7 ureteral reimplantations, and 1 repair of vesico-vaginal fistula. We compared demographic, preoperative, intraoperative and postoperative data on patients undergoing these various procedures. Symptomatic improvement was assessed at 3 months after the surgery. Results: Across all cases, mean blood loss was 16 (range 0-100) ml, mean operative time was 177 (91-354) minutes and mean length of stay was 4 (2-10) days. Assessment at 3 months after surgery was completed with the exception of 4 patients (2 pyeloplasties and 2 ureteral reimplantations). The rate of symptomatic improvement was 93.7%. We observed one case of open conversion because of adhesion and two cases of minor complication (colonic serosal tearing during adhesiolysis; percutaneous nephrostomy at postoperative day 1 after ileal ureter) in ureteral reimplantation. Conclusion: The SP system has potential to be used for nearly all robotic urologic reconstructive procedures. Despite some complications were occurred due to adhesions from previous surgery, symptom was successfully improved and a cosmetic result was satisfactory. In our experience, the SP system appears to be safe and effective for urinary tract reconstruction. keywords : da Vinci SP, reconstruction, robotic surgery