STONE Nephrolithometry Score for Renal Calculi
STONE Calculator
Stone Size
Tract Length (Skin to Stone)
Obstruction
Number of Involved Calices
Essence (Stone Density)
Result:
5
–
–
Predicts recurrence of kidney stone based on radiological criteria.
Why Use
Patients with renal stones can be difficult to assess and prognosticate.
When to Use
The patient with renal -- not ureteral -- stones.
Formula
Addition of selected points.
Management
Patients with low likelihoods of being stone-free can have their expectations managed pre-operatively, understanding that they may require additional interventions later.