Renal transplantation is the renal replacement therapy of choice in patients with end-stage chronic kidney disease. Major urological complications such as urinary leakage, ureteral stricture and urinary tract infections are usually observed in the first three months post-transplantation and lead to higher morbidity and mortality and lower graft function.

To evaluate the use of the double J catheter on major urological complications in extravesical ureteroneocystostomy in renal recipients.

Open clinical trial. Renal transplant recipients were included, who underwent extravesical ureteroneocystostomy with trans-surgical placement of double J catheter compared to extravesical ureteroneocystostomy without trans-surgical catheter placement. The study variables were urinary leakage, ureteral stricture, urinary tract infection, surgical complications and graft function.

Inclusion Criteria:

• 18 years or older
• Renal transplantation candidates
• They agree to participate in the study

Exclusion Criteria:

• Previous renal transplantation
• Urinary tract malformations
• Urinary reservoir carriers
• Known neurogenic disease of the urinary tract
• Cadaveric donor grafts
• Grafts with double collecting system
• Patients whose trans-surgical findings require catheter placement.