Antegrade pyelography
Antegrade 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 pyelography has failed or contraindicated, or when a nephrostomy tube is in place or delineation of upper tract is desired.
It is commonly used to diagnose upper tract obstruction, hydronephrosis, and 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.
