If you had anastomotic leak with urinoma and fibrosis the best option is open pyeloplastic otherwise perform laproscopic pyeloplastic 

In my opinion, it would depend on patient's age and comorbidities. In young and fit patient, I would go for open pyeloplasty. In patients with comorbidities or expected low life expectancy, I would redo endopyelotomy.

It depends on the nature of the stricture and the previous techinques used. Endopyelotomy again is often my choice. Open surgery or Lap sometimes as well. 

open peyloplasty if permit pateint general condition

Robotic Pyeloplasty. Have done 2 re-do following endopyle with great results

Can the Overtoom balloon catheter be of any advantage in failed endopyelotomy?

http://www.overtoomballoon.com/en_US/

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