What is the difference between intravenous pyelogram and retrograde pyelogram?
What is the difference between intravenous pyelogram and retrograde pyelogram?
Intravenous pyelogram – In which a contrast solution is introduced through a vein into the circulatory system. Retrograde pyelogram – Any pyelogram in which contrast medium is introduced from the lower urinary tract and flows toward the kidney (i.e. in a “retrograde” direction, against the normal flow of urine).
How is a retrograde pyelogram performed?
Retrograde pyelography uses a special dye (“contrast agent”) injected into the ureters. The dye makes the ureters and kidneys more easily seen on the x-ray. This test is like an intravenous pyelogram (IVP). But with IVP, the dye is injected into a vein instead of the ureter.
What is the purpose of a retrograde pyelogram?
A retrograde pyelogram is an imaging test that uses X-rays to look at your bladder, ureters, and kidneys. The ureters are the long tubes that connect your kidneys to your bladder. This test is usually done during a test called cystoscopy.
What contrast is used for retrograde pyelogram?
The contrast that is used for retrograde pyelography is the same that is used for excretory urography (intravenous urography). Contrast is categorized by osmolality, of which there are 3 groups: isoosmolar, low osmolar, and high osmolar. As osmolarity decreases, radiographic density increases.
Why is a retrograde pyelogram performed?
You may need a retrograde pyelogram if your healthcare provider thinks something is blocking your kidneys or ureters. It is also used to find a possible causes of blood in your urine. This may be a tumor, stone, blood clot, or narrowing (strictures).
What is a retrograde procedure?
A retrograde pyelogram is an imaging test that uses X-rays to look at your bladder, ureters, and kidneys. The ureters are the long tubes that connect your kidneys to your bladder. This test is usually done during a test called cystoscopy. It uses an endoscope, which is a long, flexible, lighted tube.
How is a retrograde ureteropyelogram used in medicine?
A retrograde ureteropyelogram provides x-ray visualization of the bladder, ureters, and the kidney (renal) pelvis by injection of sterile dye into the renal collecting system.
How does a retrograde pyelogram ( RPG ) test work?
A retrograde pyelogram (RPG) is an imaging test that uses contrast dye in your urinary tract to take a better X-ray image of your urinary system. Your urinary system includes your kidneys, bladder …
How are post void images obtained from retrograde pyelography?
Distention of the upper collecting system is painful, so overdistention is avoided. Overdistention also results in pyelosinus and pyelovenous backflow, degrading the image. The patient may need to be rolled into decubitus positions to fill out the lower pole calyces. Post void images are obtained.
When to use retrograde pyelography in IVU?
Indications 1 nonvisualization of ureteral segment on IVU and CTU if there is still clinical concern for evaluating the collecting system after an IVU or CTU, a retrograde pyelogram may be able 2 better characterization of ureteral or pelvicalyceal abnormalities seen on IVU or CTU 3 access for brush biopsies of a suspicious area of urothelium
When to use a retrograde ureteropyelogram ( Pye )?
A retrograde ureteropyelogram is performed to determine the exact location of a ureteral obstruction when it cannot be visualized on an intravenous pyelogram (a dye is injected and an x ray taken of the kidneys and the tubes that carry urine to the bladder).
Can a retrograde pyelogram be used after a CTU?
After IVU and CTU were developed, it has been rarely performed as a primary study, but it still has a few potential indications as a secondary study. if there is still clinical concern for evaluating the collecting system after an IVU or CTU, a retrograde pyelogram may be able to better image the segment of ureter
Indications 1 nonvisualization of ureteral segment on IVU and CTU if there is still clinical concern for evaluating the collecting system after an IVU or CTU, a retrograde pyelogram may be able 2 better characterization of ureteral or pelvicalyceal abnormalities seen on IVU or CTU 3 access for brush biopsies of a suspicious area of urothelium
Distention of the upper collecting system is painful, so overdistention is avoided. Overdistention also results in pyelosinus and pyelovenous backflow, degrading the image. The patient may need to be rolled into decubitus positions to fill out the lower pole calyces. Post void images are obtained.