Objective      To compare the clinical efficacy

safety

operation duration

and hospital stay of robot-assisted laparoscopic transperitoneal pyeloplasty (RA-LPP) versus conventional laparoscopic transperitoneal pyeloplasty (C-LPP) for patients with ureteropelvic junction obstruction (UPJO).       Methods        The medical records of 32 patients underwent RA-LPP and 46 patients underwent C-LPP were compared retrospectively.       Results        Mean age

body mass index

gender and UPJO distribution were similar in the two groups (

P

0.05). There was no significant dif

ference in average operative time

postoperative complications and radiographic success rate between the RA-LPP group and C-LPP group (

P

0.05). The mean estimated blood loss and mean hospital stay were significantly less in the RA-LPP group than in the C-LPP group(47.8 vs 72.3 mL

P0.05; 5.7 vs 6.9 d

P

0.01).       Conclusion       RA-LPP is an effective

safe alternative of C-LPP for the treatment of UPJO.