Kidney Stones Blood Test High. High speed or dual energy computerized tomography ct may reveal even tiny stones. They originate in your kidneys but can be found at any point in your urinary tract.
The blood urea nitrogen bun test checks for other waste products in the blood such as urea nitrogen. If you have a kidney stone these tests can help tell your doctor how big it is and exactly where it s located. You don t need to do anything to prepare for an imaging test.
Blood tests can show whether you have too much of certain substances in your blood such as uric acid or calcium.
Analysis of passed stones. There are many causes of hypercalciuria. A gfr of 15 or lower may mean kidney failure. Stone risk increases with urine calcium excretion above 200 mg day in men and women take a look.