Pyelogram – Indications, Procedures, Results

Last updated: February 8, 2026Reviewed date: February 8, 2026Reading time: 8 min read
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Intravenous pyelography (IVP), or intravenous urography, is a diagnostic test that involves the administration of intravenous contrast and X-ray imaging of the urinary tract. The iodinated contrast flows through the renal vasculature and is filtered into the collecting system highlighting the anatomic structures on the...

For severe symptoms, danger signs, pregnancy, child illness, or sudden worsening, seek urgent medical care.

বাংলা রোগী নোট এখনো যোগ করা হয়নি। পোস্ট এডিটরে “RX Bangla Patient Mode” বক্স থেকে সহজ বাংলা সারাংশ যোগ করুন।

এই তথ্য শিক্ষা ও সচেতনতার জন্য। এটি ডাক্তারি পরীক্ষা, রোগ নির্ণয় বা প্রেসক্রিপশনের বিকল্প নয়।

Article Summary

Intravenous pyelography (IVP), or intravenous urography, is a diagnostic test that involves the administration of intravenous contrast and X-ray imaging of the urinary tract. The iodinated contrast flows through the renal vasculature and is filtered into the collecting system highlighting the anatomic structures on the X-ray image. It is often useful for the evaluation of hematuria, and renal stone disease, and as a follow-up after...

Key Takeaways

  • This article explains How the Test is Performed in simple medical language.
  • This article explains How to Prepare for the Test in simple medical language.
  • This article explains How the Test will Feel in simple medical language.
  • This article explains Why the Test is Performed in simple medical language.
Educational health guideWritten for patient understanding and clinical awareness.
Reviewed content workflowUse writer and reviewer profiles for stronger trust.
Emergency safety firstUrgent warning signs are highlighted below.

Seek urgent medical care if you notice

These warning signs are general safety guidance. Local emergency numbers and clinical judgment should always come first.

  • Severe symptoms, breathing difficulty, fainting, confusion, or rapidly worsening illness.
  • New weakness, severe pain, high fever, or symptoms after a serious injury.
  • Any symptom that feels urgent, unusual, or unsafe for the patient.
1

Emergency now

Use emergency care for severe, sudden, rapidly worsening, or life-threatening symptoms.

2

See a doctor

Book a professional medical evaluation if symptoms persist, worsen, recur often, affect daily activities, or occur in a high-risk patient.

3

Learn safely

Use this article to understand possible causes, tests, treatment options, prevention, and questions to ask your clinician.

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Definition

Intravenous pyelography (IVP), or intravenous urography, is a diagnostic test that involves the administration of intravenous contrast and X-ray imaging of the urinary tract. The iodinated contrast flows through the renal vasculature and is filtered into the collecting system highlighting the anatomic structures on the X-ray image. It is often useful for the evaluation of hematuria, and renal stone disease, and as a follow-up after the intervention. The urographic imaging sequence is designed to depict specific parts of the urinary tract optimally. Portions of the urinary system appear opaque when filled with contrast material. Accurate conclusions from the IVP are feasible only when the technique, limitations, and basic rules of interpretation are known.

An intravenous pyelogram (IVP) is a special x-ray exam of the kidneys, bladder, and ureters (the tubes that carry urine from the kidneys to the bladder).

How the Test is Performed

An IVP is done in a hospital radiology department or a health care provider’s office.

You may be asked to take some medicine to clear your bowels before the procedure to provide a better view of the urinary tract. You will need to empty your bladder right before the procedure starts.

Your provider will inject an iodine-based contrast (dye) into a vein in your arm. A series of x-ray images are taken at different times. This is to see how the kidneys remove the dye and how it collects in your urine.

A compression device (a wide belt containing two balloons that can be inflated) may be used to keep the contrast material in the kidneys.

You will need to lie still during the procedure. The test may take up to an hour.

Before the final image is taken, you will be asked to urinate again. This is to see how well the bladder has emptied.

You can go back to your normal diet and medicines after the procedure. You should drink plenty of fluids to help remove all the contrast dye from your body.

or

Contrast material, radiologic table, X-ray tubes, monitor, fluoroscope, and detector are required to perform the test.

The patient must empty the bladder before the procedure. Images should systematically be obtained to improve the visualization of stones and increase the soft-tissue contrast. Imaging shall include the area from the suprarenal region to below the pubic symphysis. Before the injection of contrast, the fields of calcification must undergo evaluation. Otherwise, the contrast may conceal the calcification, potentially missing the findings.

Oblique radiographs help confirm the position and nature of calcifications. This view is vital in cases where the patient may have signs of urinary tract calculus, but none is otherwise observable on the AP view.

Although unenhanced computed tomography has replaced intravenous pyelography (IVP) in the evaluation of flank pain, IVP might play a role in the follow-ups of these patients. Adjustments after contrast administration can be made based on preliminary images. The initial images play a vital role as they indicate urinary causes for the patient’s discomfort and also indirectly help detect other abdominal pathologies.

The standard procedure for pyelography consists of the following steps:

  • A set of preliminary images (Kidney-ureter-bladder [KUB] radiograph) is necessary before contrast administration. This imaging is a crucial step and should not be missed. Additional oblique images can also be helpful.
  • Next, a bolus of contrast should be administered.
  • After 1 to 3 minutes of contrast administration, nephrographic images should be obtained. (Oblique images are also an option.)
  • A KUB radiograph should follow five minutes after contrast administration.
  • Apply abdominal compression immediately after getting a KUB radiograph.
  • Five minutes after compression, obtain pyelographic images during early bladder filling.
  • Immediately after the release of compression, obtain a KUB radiograph and fluoroscopic spot images of ureters.
  • Obtain the radiographic image of the bladder.

How to Prepare for the Test

As with all x-ray procedures, tell your provider if you:

  • Are allergic to contrast material
  • Are pregnant
  • Have any drug allergies
  • Have any kidney disease

Your provider will tell you if you can eat or drink before this test. You may be given a laxative to take the afternoon before the procedure to clear the intestines. This will help your kidneys to be seen clearly.

You must sign a consent form. You will be asked to wear a hospital gown and to remove all jewelry.

How the Test will Feel

You may feel a burning or flushing sensation in your arm and body as the contrast dye is injected. You may also have a metallic taste in your mouth. This is normal and will go away quickly.

Some people develop a pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।" data-rx-term="headache" data-rx-definition="Headache means pain in the head or upper neck. সহজ বাংলা: মাথাব্যথা।">headache, nausea, or vomiting after the dye is injected.

The belt across the kidneys may feel tight over your belly area.

Why the Test is Performed

An IVP can be used to evaluate:

  • It is useful in diagnosing congenital anomalies of the urinary tract, urinary calculi, enlarged prostate, neoplasms of the kidney, ureter, bladder, and scars and strictures of the urinary tract.
  • An abdominal injury
  • Bladder and kidney infections
  • Blood in the urine
  • Flank pain (possibly due to kidney stones )
  • Tumors

What Abnormal Results Mean

The test may reveal kidney diseases, birth defects of the urinary system, tumors, kidney stones, or damage to the urinary system.

Risks

There is a chance of an allergic reaction to the dye, even if you have received contrast dye in the past without any problem. If you have a known allergy to iodine-based contrast, a different test can be done. Other tests include retrograde pyelography, MRI, or ultrasound.

There is low radiation exposure. Most experts feel that the risk is low compared with the benefits.

Children are more sensitive to the risks of radiation. This test is not likely to be done during pregnancy.

Considerations

Computed tomography (CT) scans have replaced IVP as the main tool for checking the urinary system. Magnetic resonance imaging (MRI) is also used to look at the kidneys, ureters, and bladder.

Potential Diagnosis

The results of the IVP should systematically be assessed to minimize the chances of error.

Assessment of both kidneys

  1. Size
  2. Position
  3. Vertical axis
  4. Renal contour and symmetry
  5. Renal parenchyma and parenchymal thickening
  6. Scarring of the parenchyma
  7. Calyceal distortion
  8. Cyst
  9. Double contouring of renal parenchyma
  10. Rounding of forniceal margins
  11. Loss of papillary impression
  12. Clubbing of calyces
  13. Abortive calyces
  14. Aberrant papillae

Assessment of the ureters

  1. Symmetry of both the ureter(s)
  2. Diverticulum/diverticula of ureter(s)
  3. Ureteral obstruction
  4. Medial and lateral deviation of the ureter(s)
  5. Obstructive and non-obstructive dilatation of ureter(s)
  6. Asymmetry of the ureteral caliber

Assessment of the urinary bladder

  1. Physiologic distention
  2. Position of the bladder
  3. Bladder wall thickening
  4. Irregularity of the lumen
  5. Contour abnormalities
  6. Diverticula
  7. Neoplasms

Normal and Critical Findings

Interpretations of the results:

  • The average length of the kidney ranges from 9 to 13 cms.
  • The average renal parenchymal thickness in the polar regions is 3 to 3.5 cms, and in the interpolar regions is 2 to 2.5 cms.
  • The upper pole of the right kidney is usually at the level of the 12th rib, and the left kidney is slightly higher than the right one.
  • The vertical axis of the kidney is parallel to the ipsilateral upper third of the psoas major.
  • Parenchymal breaking and double contour may be visible in the case of a growing neoplasm.
  • Abnormal calyceal configuration can show in post-inflammatory and stone-related scarring.
  • Rounding of fornical margins can result from early and mild obstruction of the urinary tract.
  • Extensive collections of contrast material in the parenchyma can be a sign of inflammatory response.
  • Loss of papillary impression and clubbing of calyces are seen in chronic obstruction.
  • Outpouchings of contrast material are evidence of the presence of diverticula.
  • Aberrant papillae may be due to renal cell carcinoma.
  • The formation of phantom calyx due to a filling defect can appear in benign and malignant neoplasms.
  • Static columns of contrast on several images are suggestive of obstruction or ureteral ileus.
  • A separation of less than 5 cm between the ureters is considered a medial deviation. If the ureter is present more than 1cm beyond the tip of the transverse process of the vertebrae, then it is regarded as the lateral deviation of the ureter.
  • Narrowing of the ureteral lumen may be due to causes internal or external to the ureter.
  • Tuberculosis of the urinary system produces remarkable signs that are visible on pyelogram, namely: moth-eaten calyces, sawtooth ureter, pipe stem ureter, and thimble bladder. The bladder appears small and contracted due to extensive mural chronic injury or inflammation. সহজ বাংলা: অতিরিক্ত দাগের মতো টিস্যু তৈরি হওয়া।" data-rx-term="fibrosis" data-rx-definition="Fibrosis means excess scar-like tissue formation after chronic injury or inflammation. সহজ বাংলা: অতিরিক্ত দাগের মতো টিস্যু তৈরি হওয়া।">fibrosis.
  • Cobra head sign on an intravenous pyelogram is visible in the ureterocele.

Patient Safety and Education

Preparing the patient

  1. Fasting is recommended for the patient before the procedure.
  2. The patient must empty their bladder before the procedure.
  3. Mild laxatives may be prescribed.
  4. Explain the procedure to the patient.
  5. Carefully note the history of patient’s allergies, comorbidities, previous illnesses, and drug history.
  6. Ask the patient to remove all jewelry and other metal objects before the procedure.
  7. If the patient is a female, ensure that she is not pregnant at the time of the procedure. If she is pregnant, take precautionary measures to shelter the fetus from radiation exposure.

This examination is usually performed on an outpatient basis.

  1. The patient must lie still on the table while the procedure is taking place.
  2. The procedure usually takes 1 hour, but it might take longer if the kidneys are functioning at a slower rate.
  3. Compression bands may be applied to properly visualize the lower segments of the urinary tract.
Doctor visit helper

Prepare before seeing a doctor

A simple rural-patient checklist to help you explain symptoms clearly, ask better questions, and avoid unsafe self-treatment.

Safety note: This is not a prescription or diagnosis. For severe symptoms, pregnancy danger signs, children with serious illness, chest pain, breathing difficulty, stroke-like weakness, or major injury, seek urgent care.

Which doctor may help?

Start with a registered doctor or the nearest qualified health center.

What to tell the doctor

  • Write when the problem started and how it changed.
  • Bring old prescriptions, investigation reports, and current medicines.
  • Write allergies, pregnancy status, diabetes, kidney/liver disease, and major past illnesses.
  • Bring one family member if the patient is weak, elderly, confused, or a child.

Questions to ask

  • What is the most likely cause of my symptoms?
  • Which danger signs mean I should go to hospital quickly?
  • Which tests are necessary now, and which can wait?
  • How should I take medicines safely and what side effects should I watch for?
  • When should I come for follow-up?

Tests to discuss

  • Vital signs: temperature, pulse, blood pressure, oxygen saturation
  • Basic physical examination by a clinician
  • CBC, urine test, blood sugar, or imaging only when clinically needed

Avoid these mistakes

  • Do not use antibiotics, steroid tablets/injections, or strong painkillers without proper medical advice.
  • Do not hide pregnancy, kidney disease, ulcer, allergy, or blood thinner use.
  • Do not delay emergency care when danger signs are present.

Medicine safety and first-aid guide

This section is for patient education only. It does not replace a doctor, pharmacist, or emergency care.

Safe first steps

  • Avoid heavy lifting, sudden bending, and prolonged bed rest.
  • Use comfortable posture and gentle movement as tolerated.
  • Discuss physiotherapy, X-ray, or MRI only when clinically needed.

OTC medicine safety

  • For mild back pain, pain-relief medicine may be discussed with a doctor or pharmacist.
  • Avoid repeated painkiller use if you have kidney disease, stomach ulcer, uncontrolled blood pressure, or are taking blood thinners.

Avoid these mistakes

  • Do not start antibiotics without a proper medical decision.
  • Do not use steroid tablets or injections casually for quick relief.
  • Do not delay emergency care because of home remedies.

Get urgent help if

  • Back pain with leg weakness, numbness around private area, loss of urine/stool control, fever, cancer history, or major injury needs urgent care.
Medicine names, dose, and timing must be decided by a qualified clinician or pharmacist after checking age, pregnancy, allergy, other diseases, and current medicines.

For rural patients and family caregivers

Patient health record and symptom diary

Write your symptoms, medicines already taken, test results, and questions before visiting a doctor. This note stays on your device unless you print or copy it.

Doctor to discuss: Doctor / qualified healthcare provider
Tests to discuss with doctor
  • Basic vital signs: temperature, pulse, blood pressure, oxygen level if needed
  • Relevant blood, urine, imaging, or specialist tests only after clinical assessment
Questions to ask
  • What is the most likely cause of my symptoms?
  • Which warning signs mean I should go to emergency care?
  • Which tests are really needed now?
  • Which medicines are safe for my age, pregnancy status, allergy, kidney/liver/stomach condition, and current medicines?

Emergency warning signs such as chest pain, severe breathing difficulty, sudden weakness, confusion, severe dehydration, major injury, or loss of bladder/bowel control need urgent medical care. Do not wait for online information.

Safe pathway to proper treatment

Care roadmap for: Pyelogram – Indications, Procedures, Results

Use this simple roadmap to understand the next safe steps. It is educational and does not replace examination by a doctor.

Go to emergency care if you notice:
  • Severe or rapidly worsening symptoms
  • Breathing difficulty, chest pain, fainting, confusion, severe weakness, major injury, or severe dehydration
Doctor / service to discuss: Qualified healthcare provider; specialist depends on symptoms and examination.
  1. Step 1

    Check danger signs first

    If danger signs are present, seek emergency care and do not wait for online information.

  2. Step 2

    Record the symptom story

    Write when symptoms started, severity, medicines already taken, allergies, pregnancy status, and test results.

  3. Step 3

    Visit a qualified clinician

    A doctor, nurse, or qualified healthcare provider can examine you and decide which tests or treatment are needed.

  4. Step 4

    Do only useful tests

    Do tests after clinical assessment. Avoid unnecessary tests, random antibiotics, or repeated medicines without diagnosis.

  5. Step 5

    Follow up and return early if worse

    If symptoms worsen, new warning signs appear, or treatment is not helping, return for review quickly.

Rural patient practical tips
  • Take a written symptom diary and all previous prescriptions/test reports.
  • Do not hide medicines already taken, even herbal or over-the-counter medicines.
  • Ask which warning signs mean urgent referral to hospital.

This roadmap is for education. A real diagnosis and treatment plan requires history, examination, and clinical judgment.

RX Patient Help

Ask a health question safely

Write your symptom story. A health professional or site editor can review it before any answer is prepared. This box is not for emergency care.

Emergency first: Severe chest pain, breathing trouble, unconsciousness, stroke signs, severe injury, heavy bleeding, or rapidly worsening symptoms need urgent local medical care now.

Frequently Asked Questions

Is this article a replacement for a doctor?

No. It is educational content only. Patients should consult a qualified clinician for diagnosis and treatment.

When should I seek urgent care?

Seek urgent care for severe symptoms, rapidly worsening condition, breathing difficulty, severe pain, neurological changes, or any emergency warning sign.

References

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