The retrograde pyelogram uses a dye to
find out whether a
kidney stone or something else is blocking your
urinary tract. During the test, your doctor will insert a thin, lighted tube
(cystoscope) into the
urethra, which carries urine out of the body from the
bladder. He or she will then put a
catheter through the cystoscope and into a
ureter, which carries urine from the kidney to the
bladder. Dye is injected through the catheter, and X-rays are taken.
You will probably need a
local or regional anesthetic with this procedure.
Your doctor may do this test if an
intravenous pyelogram (IVP) does not help with the
diagnosis. In an IVP, the dye is injected through a vein in your arm.
You may have a retrograde pyelogram
Pregnant women normally do not have this test, because the
X-rays may harm the unborn baby.
Findings of the retrograde pyelogram may
include the following.
The kidneys, ureters, and bladder appear normal.
The flow of the dye (contrast material) is blocked,
either by a stone or another urinary problem.
The retrograde pyelogram provides
the same information as an intravenous pyelogram (IVP). But the retrograde
pyelogram can be used even if you are allergic to the dye. This test does not
risk making existing kidney damage worse.
Unlike the IVP, the
retrograde pyelogram requires an anesthetic and uses a catheter inserted
into the urinary tract.
Complete the medical test information form (PDF)(What is a PDF document?) to help you prepare for this test.
May 2, 2013
E. Gregory Thompson, MD - Internal Medicine
& Tushar J. Vachharajani, MD, FASN, FACP - Nephrology
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