title: Robotic-assisted partial nephrectomy without using ureteral stent: a single center experience.
abstract: OBJECTIVE
  To share our results of robotic assisted partial nephrectomy (RAPN) we performed without using ureteral stent in a single center from Turkey.
  
  
  METHODS
  Medical records of consecutive 45 patients (34 men and 11 women) who underwent RAPN for kidney lesions between March 2011 and December 2014 were retrieved, and evaluated. All the procedures were performed by a transperitoneal approach without using ureteral stent prior to surgery. Renal artery clamping was used in all cases and intraoperative ultrasonography was used in 2 cases.
  
  
  RESULTS
  Patients undergoing RAPN had a mean tumor size of 4.42 cm (2-8) and a mean renal nephrometry score of 5.82 (4-11). The mean estimated blood loss was 250 mL (150-450 ml) and the mean operative time was 195 minutes (150-300). There was no statistical difference between the preoperative and postoperative serum creatinine levels at the first follow-up visit (0.9 vs. 0.95, p=0.087). Surgical margin positivity was not detected in any patient, and the mean surgical margin distance was calculated as 0.4 mm (0.2-10). In only 1 patient disease recurrence was detected at the 21(st) month of the the follow-up period, and no distant metastases was reported in our patients at a mean follow-up of 10 months (3-36 mos). Our complication rate was 11.1% and according to the Clavien system complications were as; grade 2 (3 patients), grade 3a (1 patient) and grade 3b (1 patient).
  
  
  CONCLUSIONS
  With appropriately selected patients and adequate surgical experience, RAPN performed without using ureteral stent is a safe and feasible method for localized renal tumors.
authors.affiliation: Department of Urology, Acıbadem University School of Medicine, İstanbul, Turkey.
authors.forename: Burak
authors.initials: B
authors.lastname: Özkan
authors.affiliation: Department of Urology, Acıbadem University School of Medicine, İstanbul, Turkey.
authors.forename: Enis Rauf
authors.initials: ER
authors.lastname: Coşkuner
authors.affiliation: Department of Urology, Bakırköy Acıbadem Hospital, İstanbul, Turkey.
authors.forename: Veli
authors.initials: V
authors.lastname: Yalçın
keywords: Kidney cancer; partial nephrectomy; robotic- assisted partial nephrectomy; ureteral