Retrograde Pyelogram: Visualizing the Urinary System
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What is a retrograde pyelogram?
A retrograde pyelogram is an imaging test of the urinary system, especially the ureters and kidneys. Contrast dye is injected into the ureters through a cystoscope, opposite to normal urine flow, so X-rays capture clear pictures. [1] It helps providers find blockages, narrow spots, stones or tumors, and it guides procedures such as stent placement. [1] [4]
What the research says
A retrograde pyelogram can show whether stenting is likely to work. In a review of 284 patients with malignant ureteral obstruction who had 712 attempted retrograde stent placements, stenting failed in 14.1% of patients, and pyelogram findings such as grade 4 hydronephrosis (hazard ratio 4.10) and multiple ureteral strictures (hazard ratio 3.46) predicted failure (Kim et al., PLoS One, 2017) [2].
It helps surgeons choose the right repair. In a prospective study of 40 patients with recurrent pelvi-ureteric junction obstruction after surgery, retrograde pyelogram findings during the operation (stricture length and distensibility) were one of the factors used to pick the salvage procedure, and 85% (34 of 40) were treated successfully (Vishnu Sankar et al., Urologia, 2026) [3].
Doctors use it for several clear reasons. A technical review of 8 cases lists its main uses: finding ureteral injuries or obstruction, identifying stones or tumors, and helping with stent placement or ureteroscopy (Krantz et al., Urology, 2019) [4].
What is the purpose of a retrograde pyelogram?
The main goal of a retrograde pyelogram is to give healthcare providers a clear view of the upper urinary tract. The contrast agent highlights the renal pelvis (the part of the kidney near where the ureter attaches) and the ureters, which makes abnormalities easier to spot. [1] Providers use this test less often than they did in the past, because other imaging such as a CT urogram is now common. [1] It is still widely used together with cystoscopy, for example when a stent is placed to keep passageways open. [1]
Indication | Description |
|---|---|
Ureteral Blockage | Identifying narrow spots or obstructions in the tubes that connect the kidneys to the bladder. |
Stones or Tumors | Detecting stones or tumors in the kidneys, ureters, or bladder. |
Procedure Guidance | Providing a good image to place a ureteral stent or to perform a ureteroscopy. |
Ureteral Damage | Assessing possible injury to the ureters after trauma or surgery. |
What happens during a retrograde pyelogram procedure?
A retrograde pyelogram is usually an outpatient procedure in a hospital or surgery center in which contrast dye is injected into the ureter before X-rays are taken. [1] You will have general or regional anesthesia, so you will not feel pain during the test. [1] The test itself takes 30 minutes or less. [1] The main steps are:
You change into a hospital gown and an intravenous (IV) line is placed in your arm. [1]
You are taken to an operating room and positioned on the table, sometimes with your feet in stirrups. [1]
The provider passes a cystoscope (a thin, lighted tube) and instruments through the urethra and positions them in one of your ureters. [1]
Contrast dye is injected into the ureter, with care taken to avoid air bubbles. [1]
A series of X-rays of the kidneys and ureters is taken. [1]
The scope is removed and the anesthesia is stopped. [1]
If a problem is found, the provider can sometimes treat it during the same procedure, for example by removing a stone, taking care of a blood clot, or placing a stent. [1]
How do you prepare for a retrograde pyelogram, and is it safe?
Before the test, you will talk with your provider about your symptoms, your medical history, and the medicines and over-the-counter products you take. It is especially important to mention pregnancy, blood thinners, and allergies. [1] Your provider may order a urinalysis to check for a urinary tract infection, which is usually a reason to avoid the test because the test can make an infection worse. [1] Because you will have anesthesia, you need someone to drive you home the same day. You do not need to stay overnight. [1]
Aspect | Preparation Requirement |
|---|---|
Eating and Drinking | Your provider will tell you if and when to stop eating and drinking the night before the test, and whether you can take your usual medicines. |
Medical History | Tell your provider about pregnancy, blood thinners, allergies, and all current medicines. |
Transportation | Arrange a designated driver for the trip home after anesthesia. |
Clothing and Belongings | Leave jewelry and valuables at home, skip lotions and makeup, and wear loose, comfortable clothing. |
What is recovery like after a retrograde pyelogram?
After the procedure, you are taken to a recovery unit and monitored until the anesthesia wears off and your blood pressure and breathing are stable. [1] Your care team checks your urine for blood and keeps track of how much you urinate. [1] Most people can return to work or school within a few days, although recovery may take longer if other treatments were done at the same time. [1] You can return to normal eating, and you should stay hydrated. [1] Your provider may ask you to track your urine output and quality after you go home. [1]
Your results depend on why the test was done. Your provider may tell you your urinary tract looks normal, or that they found damage, a blockage, a stone, or a tumor. [1] The next steps depend on what was found.
What are the risks and complications of a retrograde pyelogram?
A retrograde pyelogram is a very safe test that uses only a low level of radiation. [1] Still, no procedure is without risk. Possible risks include:
Call your provider after the test if you develop a fever, have chills or begin shaking, find it difficult to urinate, have extreme pain when you urinate, or notice increased bleeding. [1]
Conclusion
The retrograde pyelogram remains a useful diagnostic tool for complex urinary problems. By giving clear images of the ureters and kidneys, it helps providers decide on treatment and sometimes treat a problem in the same session. Although it needs anesthesia and specialized equipment, it is very safe, and most people go home the same day.
What are the next steps if you need a retrograde pyelogram?
Getting ready for a retrograde pyelogram involves discussing the reason with your provider, following prep instructions, arranging a driver, monitoring recovery and reviewing results.
Consult Your Provider: Discuss why this test has been recommended for your symptoms.
Follow Prep Instructions: Follow the eating, drinking, and medicine instructions from your medical team.
Arrange Transportation: Schedule a reliable driver for the day of your procedure.
Monitor Your Recovery: Track your symptoms and urine output as instructed after you get home.
Review Your Results: Schedule a follow-up appointment to discuss the findings and plan any next steps.
Trusted resources: Urology Care Foundation, National Institute of Diabetes and Digestive and Kidney Diseases.
Frequently Asked Questions
What does "retrograde" mean in this test?
The term "retrograde" means the contrast dye is pushed into the ureters in the opposite direction of the way urine normally flows.
Is the procedure painful?
No. You have anesthesia, so you will not feel pain during the test.
How long does the test take?
A retrograde pyelogram takes 30 minutes or less.
Why do I need anesthesia for an imaging test?
The instruments are passed through the urethra and positioned in the ureter, so anesthesia keeps you comfortable during the procedure. It can be general or regional anesthesia.
Can I drive myself home?
No. Because of the anesthesia, you need a designated driver to take you home the same day.
What is a bilateral retrograde pyelogram?
A bilateral retrograde pyelogram is a retrograde pyelogram done on both ureters, rather than just one.
Are there alternatives to this test?
Yes. Providers more often use other imaging today, such as a CT urogram. A retrograde pyelogram is still commonly used together with cystoscopy, for example when a stent is placed to keep passageways open.
What is the contrast dye?
The contrast dye is a contrast agent that shows up clearly on X-rays and makes the ureters and kidneys easier to see. It is injected into the ureter through the cystoscope.
Can the doctor treat my stones during this test?
Sometimes. With the same scope and instruments, a provider may be able to remove stones, take care of a blood clot, or place a stent before ending the procedure.
Is the radiation exposure dangerous?
The level of radiation is low for this test. Tell your provider before the test if you are or might be pregnant.
What if I have a urinary tract infection?
A urinary tract infection is usually a reason to avoid the test, because the test can make an infection worse. Your provider may check your urine first.
When can I return to work?
Most people can go back to work or school within a few days. Recovery may take longer if other procedures were done at the same time.
Do I need to stay in the hospital overnight?
No. The test is typically done as an outpatient procedure, and you go home the same day with a driver.
What should I do if I see blood in my urine?
Your care team checks your urine for blood after the test. Call your provider if you notice increased bleeding, have trouble urinating, or have extreme pain when you urinate.
What are the risks of this test?
A retrograde pyelogram is very safe. Risks include problems with anesthesia, a reaction to the dye, nausea and vomiting, urinary tract infection, and possible damage to parts of the urinary tract, including the bladder and ureters.
Related Reading
Cystoscopy: Purpose, Procedure, Recovery and Risks explains the bladder scope used to perform a retrograde pyelogram.
Ureteral Obstruction: Symptoms, Causes, and Treatment describes blockages of the ureter that this test can find.
CT Urogram: What It Is, Why It's Done, How to Prepare and What to Expect explains a CT scan of the kidneys, ureters and bladder.
Intravenous Pyelogram (IVP): What It Is, Why It's Done, Risks and Results covers an older X-ray test that uses dye through a vein.
References
Cleveland Clinic. Retrograde Pyelogram. Cleveland Clinic. March 6, 2026. https://my.clevelandclinic.org/health/treatments/22684-retrograde-pyelogram
Kim SH, Park B, Joo J, et al. Retrograde pyelography predicts retrograde ureteral stenting failure and reduces unnecessary stenting trials in patients with advanced non-urological malignant ureteral obstruction. PLoS One. 2017;12(9):e0184965. PMID 28931043. https://doi.org/10.1371/journal.pone.0184965
Vishnu Sankar KV, Maiti K, Sarkar D. Management of failed pyeloplasty patients with recurrent pelvi-ureteric junction obstruction. Urologia. 2026. PMID 42216958. https://doi.org/10.1177/03915603261441147
Krantz TE, McFerren SC, Riley JM, et al. Tips and tricks for performing a retrograde pyelogram. Urology. 2019;129:234. PMID 30959119. https://doi.org/10.1016/j.urology.2019.03.027
Medical Disclaimer
This article is for informational purposes only and does not constitute medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.
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