Retrograde pyelogram for kidney stonesExam Overview
The retrograde pyelogram uses a dye to
determine 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.
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