Summary of scoring systems
Resorlu-Unsal stone score (RUSS): Stone size >20mm, lower pole stone and IPA<45o, stone number in different calyces >1, abnormal renal anatomy (horseshoe kidney or pelvic kidney).Each condition was given 1 point. Total score of 0-4.
Modified S-ReSC: The modified S-ReSC score was assigned according to the number of sites involved in the renal pelvis (#1), superior and inferior major calyceal groups (#2-3), and anterior and posterior minor calyceal groups of the superior (#4-5), middle (#6-7), and inferior calyx (#8-9). If the stone was in the inferior sites (#3, #8-9), one additional point per site was added.
Ito’s nomogram: Stone volume (≤500, 500<x≤1000, 1000<x≤2000,>2000 mm3), lower pole calculi, operator experience (<50, ≥50), hydronephrosis and number of stones. A nomogram score was calculated according to these parameters (total score 0-25). High total score was predictive of successful outcome.
R.I.R.S. score: Renal stone density (≤1000, >1000), inferior pole stone (non-inferior, inferior with RIPA>30o, inferior with RIPA≤30o), renal infindibular length (≤25, >25 mm), stone burden (≤10, >10 and ≤20, >20 mm). Total score range 4-10 points. Ten points indicates the most complex situation.