Retrograde Urography Water-soluble contrast medium is injected retrogradely through the urethra by catheters and up into the bladder(retrograde cystography), or up into the ureter and pelvis by intra-ureteral cannula(Retrograde Pyelography Useful for the diagnosis of urethral strictures diverticula, tumors and in trauma Check the urinary tract obstructive lesions ° ndication: renal dysfunction, fail ofⅣVP Contraindication: Lower urinary tract infection• Water-soluble contrast medium is injected retrogradely through the urethra by catheters and up into the bladder (Retrograde cystography), or up into the ureter and pelvis by intra-ureteral cannula (Retrograde Pyelography). • Useful for the diagnosis of urethral strictures, diverticula, tumors and in trauma. • Check the urinary tract obstructive lesions. • Indication: renal dysfunction, fail of IVP. • Contraindication: Lower urinary tract infection. Retrograde Urography