MDCalc

STONE Nephrolithometry Score for Renal Calculi

Predicts recurrence of kidney stone based on radiological criteria.

Stone size in mm²
Length × width in mm
Tract length (mm)
Distance from center of stone to the skin measured on CT film at 0°, 45°, and 90°
Obstruction (hydronephrosis)
Number of calyces with calculi
Essence (stone density in Hounsfield units)

Result:

Please fill out required fields.
Management

Patients with low likelihoods of being stone-free can have their expectations managed pre-operatively, understanding that they may require additional interventions later.