Tools & Calculators

Kidney STONE Calculator

Written byMedicalicUpdated
Enter the total stone surface area from non-contrast CT. For each stone, use 0.785 × length × width and add the areas when multiple stones are present.
Enter the skin-to-stone distance measured on non-contrast CT.
Obstruction (O)
Select the degree of collecting-system dilatation or hydronephrosis on non-contrast CT.
Number of Involved Calyces (N)
Enter the stone density measured on non-contrast CT in Hounsfield units.
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Written byMedicalicUpdated
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