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.
Often there are no symptoms of a kidney stone until it starts to move and blocks the flow of urine.
When this happens, symptoms may include:
Waves of sharp pain in your back and side or lower abdomen. The pain may move toward the groin or testicles.
Inability to find a comfortable position. People with kidney stones often pace the floor.
Nausea and vomiting with ongoing flank pain
Blood in the urine
The frequent urge to urinate
Sometimes an infection is also present, and may...
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.
What To Think About
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.