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A medical evaluation helps your doctor find out what’s causing your symptoms. A health history and physical exam may reveal signs of a stone. Diagnostic studies can confirm the presence of a stone and locate it. Detailed metabolic tests of your blood, urine, and the stone may also be done. These test results help your doctor recommend treatment.
These tests confirm your doctor’s diagnosis. They can detect infection or reveal the image of a stone. You may not need all of these tests.
Urinalysis looks for blood in the urine (hematuria), one sign of a stone. Pus in the urine (pyuria) suggests a stone or infection.
A urine culture can reveal a urinary tract infection. Test results appear 24–48 hours after the urine sample is collected.
Blood tests can confirm a kidney infection. They show any abnormalities in the white cell count of your blood.
A KUB (Kidney, Ureter, Bladder) x-ray provides a view of the entire abdomen. An IVP (intravenous pyelogram) x-ray uses dye to locate your stone.
Ultrasound uses sound waves to create a picture of the kidney. This helps show stones and reveal blockages in the urinary tract.
A CT (computed tomography) scan takes multiple x-rays of the urinary tract. This helps locate and identify a stone. A CT scan can be done without dye. This makes it safe for patients who have dye allergies or kidney disease.
If you have a stone, your doctor may order one or more metabolic tests. These tests may show why you formed a stone. And they show what kind of stone you may form in the future. This helps your doctor plan your treatment and prevention program.
Stone analysis shows your stone’s chemical makeup, if the stone is retrieved. This may suggest the cause of your stone.
Blood tests measure your levels of stone-related chemicals, such as calcium.
A 24-hour urine sample shows the levels of stone-related chemicals in your urine. You collect all your urine for 24 hours in a special container.
Provocative tests show how your kidneys handle chemicals, such as calcium. The tests monitor your response to low- or high-calcium diets.