Kidney Stone Risk Panel Tests

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Kidney stone risk panel is a group of tests measuring the amount of substances in urine. The results are commonly associated with the formation of kidney stones (nephrolithiasis).

 

Interpretations

  • For a person who has kidney stones, an increased level of these substances, particularly calcium, can increase the risk of developing additional stones and the other likely types of stones.
  • In general, if a substance such as calcium or uric acid is present in excess in both the blood and urine, then it represents an increased risk for kidney stone formation and a condition that should be further investigated to determine the cause.

 

Things Must Keep in Mind

  • The results of the kidney stone risk panel are evaluated in conjunction with other tests performed in order to help determine a person’s likely risk of developing another stone.
  • Test results cannot predict, however, who will develop another kidney stone or when.
  • Some people with mild elevations, or even results within normal ranges, may form stones.
  • Other people with significantly increased results will not. A stone may be present in a kidney for years without causing any overt signs (hematuria) or symptoms (flank pain).

 

Common Test Results

Test Result Indicating Increased Kidney Stone Risk Stone Formation / Comments
Creatinine N/A Blood and urine creatinine levels are associated with kidney function; they may be used for comparing to other substances as the level of creatinine in blood is normally stable and, in urine, it indicates how dilute or concentrated the urine is
Urine calcium High Possibility for calcium oxalate or calcium phosphate stones
Urine oxalate High Possibility for calcium oxalate stones
Urine uric acid High Uric acid stones may form; many who have increased uric acid also have gout.
Urine citric acid Low Citric acid helps inhibit stone formation.

Keywords: kidney stone risk panel; kidney stones; calcium

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