A kidney stone can cause sudden side pain, back pain, or discomfort while passing urine. However, not every episode of side pain is caused by a stone. Therefore, if you suspect a kidney stone or already have a known stone, the right tests can help identify its location, assess your kidney function, and guide further treatment.
In Bangalore, people who work long hours in air-conditioned offices may also find it easy to forget to drink water. Moreover, low water intake can contribute to concentrated urine, which increases the risk of kidney stone formation in susceptible individuals. Consequently, understanding the signs of a kidney stone and knowing which test to book can make the next step clearer.
This Blog Includes:
- Article Title: Kidney Stone? Tests and Ultrasound KUB in Bangalore – Cost and Preparation
- Publisher: Prima Diagnostics
- Target Keyword: Kidney Stone
- Search Intent: Someone experiencing side pain or someone with a known kidney stone who wants to understand tests, cost, and preparation
- Tests Covered: Urine Routine, KFT, Ultrasound KUB, CT KUB
- Topics Covered: Kidney stone symptoms, urinary obstruction, kidney function, imaging, preparation, hydration, hard water, and dietary prevention
- Preparation Guidance: Water and bladder preparation for ultrasound KUB; CT preparation according to the imaging centre’s instructions
- FAQ Section: Included

Which Test Detects Kidney Stone?
Ultrasound KUB is a commonly used imaging test for kidney stones. It examines the kidneys, ureters, and urinary bladder. However, small stones or stones in certain locations may not be visible on ultrasound. In those situations, a doctor may recommend a CT KUB, which can provide more detailed imaging.
Urine routine and kidney function tests are also useful, but they serve a different purpose. A urine test can detect blood, crystals, and signs of infection, while KFT assesses kidney function.
Signs of a Kidney Stone
Sudden Side or Back Pain
One of the most recognizable symptoms is sharp pain in the side of the back, below the ribs. Sometimes, the pain travels towards the lower abdomen or groin.
Additionally, the pain may come in waves as a stone moves through the urinary tract. However, pain severity does not always indicate stone size.
Painful or Frequent Urination
A stone near the bladder or lower ureter may cause a frequent urge to urinate, burning, or discomfort while passing urine.
Nevertheless, these symptoms can also occur with a urinary tract infection. Therefore, a urine test may help distinguish between possible causes.
Blood in Urine
Kidney stones can cause blood in the urine, which may appear pink, red, or brown. In other cases, blood is detected only through a laboratory urine test.
Nausea and Vomiting
Pain from a kidney stone can sometimes be accompanied by nausea or vomiting. Consequently, persistent vomiting may make it difficult to maintain hydration and warrants medical attention.
When Side Pain Needs Urgent Medical Attention
Although many kidney stones pass without a major complication, some situations require urgent care.
Seek prompt medical evaluation if you have:
- Fever or chills along with suspected kidney stone symptoms.
- Severe or worsening pain.
- Persistent vomiting or inability to drink fluids.
- Difficulty passing urine.
- Pain during pregnancy or a single functioning kidney.
In particular, fever with a suspected obstructing stone can indicate a potentially serious infection. Therefore, do not delay medical care while waiting for a routine scan.
Urine Routine Test for Kidney Stones
A urine routine test, also called urinalysis, is often part of the initial evaluation.
It may help detect:
- Blood in the urine.
- White blood cells or other signs suggesting infection.
- Crystals that may provide clues about stone formation.
- Urine concentration and other findings.
However, a normal urine report does not completely rule out a kidney stone. Thus, imaging may still be necessary when symptoms persist.
Kidney Function Test (KFT)
The Kidney Function Test (KFT) checks blood markers such as creatinine and urea, which help assess kidney function.
This is particularly relevant when a stone may be obstructing urine flow or when there are concerns about reduced kidney function.
Furthermore, KFT can be useful before certain treatments or contrast-enhanced imaging, depending on the doctor’s instructions.
Ultrasound KUB: What It Shows
Ultrasound KUB is a non-invasive scan of the kidneys, ureters, and bladder.
What Does KUB Stand For?
KUB stands for:
- K — Kidneys
- U — Ureters
- B — Bladder
The scan uses sound waves to create images of these urinary system structures. Therefore, it does not involve ionizing radiation.
Can Ultrasound KUB Detect All Stones?
Not always. Ultrasound may detect stones in the kidneys and can sometimes show indirect signs of obstruction, such as swelling of the kidney.
However, very small stones or stones in the ureters may be missed. Consequently, a CT scan may be recommended if ultrasound findings are inconclusive and the clinical suspicion remains high.
CT KUB for Detailed Stone Detection
A non-contrast CT KUB is commonly used when more detailed stone imaging is required.
It can help identify the stone’s size, location, and degree of obstruction. In addition, it may detect stones that are difficult to visualize on ultrasound.
However, a CT scan uses ionizing radiation. Therefore, the decision to undergo a CT scan should be made with your doctor, particularly during pregnancy.
Kidney Stone Test Cost at Prima Diagnostics
The total cost of kidney stone evaluation depends on which tests your doctor recommends. For example, someone with mild side pain may need a urine routine and ultrasound KUB, whereas a patient with a known stone may require KFT or CT KUB for further assessment.
Price Guide for Kidney Stone Tests
| Test | Purpose | Current price |
| Urine Routine | Checks urine for blood, crystals, and other abnormalities | Confirm with Prima |
| KFT | Assesses kidney function | Confirm with Prima |
| Ultrasound KUB | Examines the kidneys, ureters, and bladder | Confirm with Prima |
| CT KUB | Provides detailed imaging of urinary tract stones | Confirm with Prima |
Because diagnostic prices and package offers can change, check the current amount before booking.
How to Prepare for Ultrasound KUB
Preparation for an ultrasound KUB may vary slightly depending on the centre and the specific scan instructions.
Drink Water Before the Scan
In many cases, you may be asked to drink water before the scan. This helps fill the urinary bladder, which can make it easier to assess the bladder and some surrounding structures.
However, do not force excessive water intake if you have been advised to restrict fluids because of a kidney or heart condition.
Do You Need a Full Bladder?
A full bladder may be required for certain ultrasound KUB examinations. Therefore, follow the preparation instructions given when booking.
Is Fasting Required?
Fasting is not always necessary for a standard ultrasound KUB. Nevertheless, the imaging centre may provide specific instructions depending on the examination.
Preparation for CT KUB
For a non-contrast CT KUB, fasting may not be required. However, preparation can differ if a contrast-enhanced examination is planned.
Importantly, inform the radiologist or imaging team if you are pregnant or think you may be pregnant.
Kidney Stone Diet Tips
Dietary changes can help reduce the risk of some kidney stones. However, the right diet depends on the type of stone and your medical history.
Drink Enough Water
Adequate hydration is one of the most important steps in kidney stone prevention.
For people living in Bangalore, long office hours, air conditioning, and busy work schedules can make regular water intake easy to overlook. Therefore, keep water accessible throughout the day and avoid waiting until you feel very thirsty.
Your healthcare professional can recommend an appropriate fluid intake, especially if you have kidney disease or another condition requiring fluid restriction.
Reduce Excess Salt
A high-sodium diet can increase calcium excretion in the urine, which may contribute to calcium stone formation.
Consequently, reducing excess salt in packaged foods, snacks, and meals may help lower the risk of recurrence.
Do Not Eliminate Calcium Without Advice
Calcium is an essential nutrient. In fact, normal dietary calcium intake can help reduce the absorption of oxalate in the digestive tract.
Therefore, do not remove calcium-rich foods from your diet without discussing it with a healthcare professional.
Limit Sugary Drinks
Regular consumption of sugar-sweetened beverages may be associated with kidney stone risk. As a result, choosing water more often can be a useful dietary habit.
Eat More Fruits and Vegetables
Fruits and vegetables provide nutrients and may help support dietary patterns that reduce stone risk. However, some individuals with specific types of stones may need personalized dietary advice.
Can Bangalore Hard Water Cause Kidney Stones?
Hard water contains higher levels of dissolved minerals, including calcium and magnesium. Nevertheless, hard water alone is not established as a direct cause of kidney stones.
Instead, kidney stone formation is influenced by several factors, including urine concentration, stone type, dietary habits, genetics, and certain medical conditions.
Therefore, if you have recurrent stones, discuss stone analysis and individualized prevention with your doctor rather than assuming that the water supply is the only cause.
What Happens After a Kidney Stone Scan?
Once the test is completed, the radiologist or laboratory provides a report.
Depending on the findings, your doctor may recommend observation, medication, repeat imaging, or a urology consultation. Additionally, if the stone is large, obstructing urine flow, or causing complications, further treatment may be necessary.
Consequently, the report should be interpreted alongside your symptoms and kidney function results.
Frequently Asked Questions
Which test detects kidney stones most accurately?
A non-contrast CT KUB is commonly used when detailed stone detection is required. Ultrasound KUB is also useful, especially when avoiding radiation is important. The best test depends on your symptoms, age, pregnancy status, and clinical situation.
Is ultrasound KUB enough to detect a kidney stone?
Ultrasound can detect many kidney stones, but it may miss small stones or stones in certain ureteral locations. Therefore, a CT scan may be recommended if the ultrasound is inconclusive.
What is the cost of ultrasound KUB in Bangalore?
The price depends on the diagnostic centre, the type of scan, and applicable offers. Check the current Ultrasound KUB price at Prima Diagnostics before booking.
Can a urine test confirm a kidney stone?
A urine routine can identify blood, crystals, and other abnormalities that support the evaluation. However, it cannot reliably confirm or rule out a stone by itself.
Can I get a kidney function test with an ultrasound KUB?
Yes. KFT and ultrasound KUB are commonly used together when a doctor is assessing kidney stones or possible obstruction. They provide different types of information.
Can I get kidney stone tests through home collection in Bangalore?
Prima Diagnostics offers home sample collection for eligible laboratory tests. However, an ultrasound KUB or CT KUB requires an imaging appointment at an appropriate facility.
Conclusion
Ultimately, kidney stone evaluation is not limited to one test. Urine routine can provide useful clues, KFT helps assess kidney function, and ultrasound KUB offers a radiation-free way to examine the urinary system. Meanwhile, CT KUB may be recommended when more detailed imaging is needed.
Therefore, if you have side pain or a known kidney stone, discuss the appropriate tests with your healthcare professional. In addition, maintaining adequate hydration, reducing excess salt, and following a personalized stone-prevention diet can help support long-term kidney health.