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Kidneys, Ureters & Bladder Ultrasound Scan
185.00
A Kidneys, Ureters & Bladder (KUB) Ultrasound Scan examines the urinary system using safe, radiation-free imaging. It helps identify stones, obstruction, infection and bladder emptying problems.
Turnaround time
1 day
Same-Day Appointments
UKAS Accredited Labs
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Details about Kidneys, Ureters & Bladder Ultrasound Scan
What is a Kidneys, Ureters & Bladder Ultrasound Scan?
A Kidneys, Ureters & Bladder (KUB) Ultrasound Scan is a non-invasive imaging test that uses high-frequency sound waves to produce real-time images of the urinary tract. It does not use ionising radiation and is considered very safe.
This scan assesses the kidneys, ureters (the tubes connecting kidneys to the bladder) and the bladder itself. It allows clinicians to evaluate organ size, structure, fluid flow, bladder volume and post-void residual urine.
KUB ultrasound is commonly used as a first-line investigation for urinary symptoms, kidney problems and abnormal blood or urine test results.
Why do I need a KUB Ultrasound Scan?
A KUB ultrasound scan is recommended when symptoms or test results suggest a possible issue affecting the kidneys or urinary system. It helps identify the cause of urinary symptoms quickly and accurately.
You may need a KUB ultrasound scan if you experience:
- Flank or lower back pain
- Blood in the urine (haematuria)
- Recurrent urinary tract infections
- Pain or difficulty passing urine
- Frequent or urgent urination
- Suspected kidney or bladder stones
- Reduced urine output
- Abnormal kidney function blood tests
- Urinary retention or incomplete bladder emptying
- Monitoring of known kidney or bladder conditions
Early imaging supports timely diagnosis and helps prevent complications such as kidney damage.
Benefits of a KUB Ultrasound Scan
- Safe, radiation-free imaging
Suitable for repeated use and long-term monitoring. - Real-time urinary tract assessment
Visualises kidney structure and bladder filling/emptying. - Detects stones and obstruction
Identifies kidney stones, bladder stones and urinary blockage. - Assesses kidney size and health
Helps evaluate chronic or acute kidney conditions. - Evaluates bladder function
Measures residual urine after voiding. - Fast and accessible
Often performed and explained on the same day. - Non-invasive and painless
No needles or injections required. - Cost-effective first-line test
Often avoids unnecessary CT or invasive investigations.
Step-by-Step – How We Offer KUB Ultrasound Scans
Clinic-Based KUB Ultrasound Scan (UK-wide)
- Choose your nearest UK clinic
- Attend your scheduled appointment
- The scan typically takes 15–30 minutes
- Performed by an experienced clinician
- Findings are explained during or shortly after the scan
Important:
KUB ultrasound scans are performed in clinic only. Home visits are not available. Services are available across the UK.
Your KUB Ultrasound Results Explained
KUB ultrasound results are interpreted based on organ size, structure and urinary flow, rather than numerical values.
Normal Results
What this means:
- Normal kidney size and appearance
- No stones, obstruction or abnormal fluid
- Normal bladder filling and emptying
What it suggests:
Urinary symptoms may be functional or temporary.
Mild to Moderate Abnormal Findings
What this may show:
- Small kidney or bladder stones
- Mild kidney swelling (hydronephrosis)
- Incomplete bladder emptying
- Mild structural changes
What it suggests:
Often managed with medication, hydration, monitoring or lifestyle advice.
Significant or Severe Abnormal Findings
What this may show:
- Large stones
- Significant urinary obstruction
- Marked kidney swelling
- Significant post-void urine retention
What it suggests:
May require urgent referral, further imaging or specialist treatment.
How It Works
Simple steps to get your results
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Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
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Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
3
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.
Frequently Asked Questions
No. The scan is painless and non-invasive. Mild pressure may be applied but it is generally comfortable.
Most scans take 15 to 30 minutes, depending on what needs to be assessed.
Yes. You may be asked to drink water and have a full bladder before the scan. Instructions will be provided in advance.
In most cases, no referral is required. A brief clinical assessment is completed beforehand.
Yes. Ultrasound uses sound waves, not radiation, and is considered extremely safe.
Kidney stones, bladder stones, urinary obstruction, kidney swelling, urinary retention and structural abnormalities.
Results are often explained on the same day or shortly after the scan.
Yes. KUB ultrasound is safe and commonly used in children.
Wear comfortable clothing that allows easy access to the lower abdomen.
You may be advised on further tests, monitoring or referral to a urologist or specialist if required.
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