DTPA renal scan — Patient information · Ruqelo Health
Radiology·Radiology
DTPA renal scan
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Educational summary — not medical advice. Discuss with your healthcare provider.
Informed by recognized medical guidance
Overview
A DTPA renal scan is a safe imaging test that uses a tiny amount of a radioactive tracer (DTPA) to see how well your kidneys filter blood and how urine drains from them into your bladder. It is not a condition but a tool doctors use to check kidney function and look for blockages or other problems.
Key facts
The scan is non-invasive and takes about 1 hour.
You lie on a table while a special camera takes pictures as the tracer moves through your kidneys.
You will receive a small injection of the tracer into a vein in your arm.
The radiation exposure is very low and similar to a few X-rays.
Questions about this article
After the scan, you can go home and return to normal activities.
Yes, DTPA renal scans are a common imaging test used worldwide when doctors need to assess kidney function, look for blockages (like from a stone), or check drainage after surgery.
The scan is used for people of all ages, including children and older adults, who may have kidney problems such as reduced function, urinary tract infections, high blood pressure, or suspected blockages.
Symptoms
Call emergency services immediately if you notice:
Sudden severe pain in your side or back, especially with fever or vomiting
Complete inability to urinate
Blood in urine (red or cola-colored)
Acute confusion or seizure
See a doctor urgently (same day) if you notice:
⚠New or worsening swelling in your legs or face
⚠Persistent nausea or vomiting
⚠Fever above 38°C (100.4°F) with chills
⚠Rapidly rising blood pressure at home
Common symptoms
Swelling in legs, ankles, or feet (oedema)
Changes in urination (less often, pain, or difficulty)
High blood pressure that is hard to control
Unexplained lower back or side pain
Symptoms in children
Fever with no clear cause
Poor growth or weight gain
Recurrent urinary tract infections
Swelling of the face or body
Symptoms in older adults
Confusion or lethargy due to kidney issues
Less urine output than usual
Itching or nausea related to kidney waste build-up
Sudden high blood pressure
Causes
Main causes
Reduced blood flow to the kidneys (from dehydration, blockage, or narrow arteries)
Blockage in the drainage tubes (ureters) e.g., from a kidney stone or tumour
Scarring from previous infections or reflux
Congenital abnormalities in kidney structure
Risk factors
Diabetes
High blood pressure
Family history of kidney disease
Frequent urinary tract infections
Use of certain medications (always discuss with your doctor)
When to see a doctor
See a doctor urgently if:
If you have sudden severe side or back pain
If you notice blood in your urine
If you are unable to pass urine for more than 12 hours
If you have high fever with chills and flank pain
Book a routine appointment if:
If you have ongoing high blood pressure that is not controlled
If you have swelling in your ankles or legs that does not go away
If you have unexplained changes in urination (frequency, urgency, pain)
If you have a family history of kidney disease and want to check your kidney health
A DTPA renal scan is a simple, painless procedure. Your doctor will explain why they recommend it and what the results might mean. The radiation dose is very small and safe for most people, including children. You can ask your healthcare team any questions before the scan.
Diagnosis
A DTPA renal scan is itself a diagnostic test. It helps doctors see how your kidneys filter blood (function) and how urine flows from the kidneys to the bladder (drainage). It is often combined with other tests like ultrasound, blood tests, or a CT scan for a complete picture.
Tests that may be done
DTPA renal scan (nuclear medicine scan)
Ultrasound of the kidneys and bladder
Blood tests to check creatinine and eGFR (kidney function)
Urine tests to check for infection or protein
What to expect at your appointment
Before the scan, you should drink plenty of water (unless told otherwise). A nurse will place a small IV line in your arm and inject the tracer. You will lie still on a table while a camera takes pictures for about 30-45 minutes. You may be asked to empty your bladder after the first set of images. There is no pain, only a small pinch from the needle. Results are usually available within a day or two.
Treatment
Treatment depends on what the scan shows. If there is a blockage, doctors may need to remove the obstruction. If kidney function is low, treatment focuses on preserving existing function and managing complications. Your healthcare team will discuss the best plan for you.
Self-care at home
Drink enough water to stay well-hydrated (unless your doctor advises a fluid restriction)
Reduce salt in your diet to help control blood pressure
Avoid taking over-the-counter medicines like ibuprofen without checking with your doctor first
Take any prescribed medicines exactly as directed
Medical treatments
Treatment may include medicines to lower blood pressure, control blood sugar, or reduce swelling. If an infection is present, antibiotics will be prescribed. In some cases, a procedure to place a small tube (stent) in the ureter may be needed to help urine drain. Always follow your doctor's recommendations.
When is surgery considered?
Sometimes, if a blockage cannot be relieved with less invasive methods or if there is a birth defect causing repeated problems, surgery may be needed. Your surgeon will explain all options and risks beforehand.
Living with this condition
Most people live normally after a DTPA renal scan. If you have a chronic kidney condition, you may need regular check-ups, blood tests, and imaging. Work closely with your healthcare team to manage your kidney health.
Lifestyle tips
Control blood pressure and blood sugar levels
Avoid smoking and limit alcohol
Get regular exercise (at least 30 minutes most days)
Maintain a healthy weight
Diet and exercise
Your doctor may suggest a kidney-friendly diet low in salt, potassium, and phosphorus if your kidney function is reduced. But for most, a balanced diet with plenty of fruits, vegetables, and whole grains is good. Stay active but avoid vigorous exercise if you have a blockage or recent surgery—check with your doctor first.
Mental health and emotional wellbeing
Learning you have a kidney problem can be worrying. It is normal to feel anxious or stressed. Talk to your doctor, a counsellor, or a support group. Taking care of your mental health is as important as physical health.
Prevention
Many kidney problems cannot be completely prevented, but you can lower your risk by managing high blood pressure, controlling diabetes, staying hydrated, and avoiding too much over-the-counter pain medicine (like NSAIDs).
Screening programmes
If you have risk factors (diabetes, high blood pressure, family history), regular blood pressure checks and urine tests can help catch problems early. Your doctor may also recommend periodic kidney function tests.
Complications
If left untreated
Worsening kidney function leading to chronic kidney disease
Permanent kidney damage or failure
Recurrent urinary tract infections
High blood pressure that is hard to control
Fluid build-up (oedema) and shortness of breath
Long-term outlook
The outlook depends on the underlying cause. Many kidney problems found early can be managed well with treatment and lifestyle changes. Even if kidney function is reduced, many people live full, active lives with good medical care. A DTPA renal scan helps your doctor make an accurate diagnosis so they can give you the best care.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
Sources and guidance
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 16, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.
