Anterograde pyelography

Anterograde pyelography is the procedure used to visualize the upper collecting system of the urinary tract, i.e., kidney and ureter. It is done in cases where excretory or retrograde pyelogaphy has failed or contraindicated,or when there is nephrostomy tube is in place or delineation of upper tract is desired. It is commonly used to diagnose upper tract obstruction, Hydronephrosis, Ureteropelvic junction obstruction. In this, radiocontrast dye is injected into the renal pelvis and X-rays are taken. It provides detailed anatomy of the upper collecting system. As it is an invasive procedure, it is chosen when other non-invasive tests are non confirmatory or contraindicated and patient monitoring is required prior and after the procedure.