Patient selection: stricture of the anterior urethra
Parameters to be evaluated by sonography:
(1) length of the stricture, especially in severe cases following perineal trauma
(2) complexity of the stricture
(3) minimum diameter of the urethra along the stricture
(4) periurethral fibrosis, with posterior shadowing indicating severe fibrosis which requires complete resection when possible
(5) spongiofibrosis, which is considered severe if the nondistensible portion of the urethral lumen measures < 3 mm during maximal retrograde distention
(6) complicating features (ee below)
(7) vascularity
Complicating features:
(1) calculi
(2) stent encrustations
(3) false passages
(4) urethral hair from previous scrotal flap procedure
(5) strictures associated with a previous surgical repair
