Fig. 1From: Clinical efficacy of retrograde urethrography-assisted urethral catheterization after failed conventional urethral catheterizationUrethral catheterization under RGU. a Contrast fluid remained in the bladder after enhanced computed tomography. b Narrowed prostatic urethra. c An oblique image of a narrowed prostatic urethra. c A hydrophilic guide wire was inserted into bladder under fluoroscopic guidance. d Foley catheter was inserted into the bladder using a hydrophilic guide wireBack to article page