Retrograde pyelogram is procedure where contrast dye is injected into the kidneys through the ureters in order to visualise the ureters, renal pelvis and calyceal collecting system.
Retrograde pyelogramis used to evaluate lining renal collecting system, it is also performed prior to ureteroscopy or placement of ureteral stents. The procedure is usually performed when an intravenous pyelogram (IVP) is not able to provide a definitive diagnosis. It is also performed in patients with chronic kidney disease who cannot tolerate intravenous contrastdyes and in those who are allergic to the contrast dyes.
Retrograde pyelogramis contraindicated if you are pregnant or suspect pregnancy as radiation exposure may lead to birth defects.
A thin lighted viewing tool called a cystoscope is inserted through the urethral opening and advanced into the bladder. The bladder is examined and a catheter is inserted through the cystoscope into one or both ureters. Through the catheter, contrast dye is injected into the ureter and a series of X-rays are taken at timed intervals. The catheter and cystoscope are removed after the procedure.