S.T.O.N.E. nephrolithometry (PCNL complexity)
S.T.O.N.E. nephrolithometry (PCNL complexity) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
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What this is
S.T.O.N.E. nephrolithometry (PCNL complexity) is one of 230 deterministic tools in Sophie Well's Clinical Scoring & Risk group. S.T.O.N.E. nephrolithometry (PCNL complexity) - a deterministic tool in Sophie Well's Clinical Scoring & Risk group.
When to use it
Use this tool when you need a quick, citable reference. Every calculation runs entirely in your browser - no inputs leave your device, no account is required, no AI is involved. The site enforces a strict Content Security Policy and ships no analytics or third-party CDN.
References
Okhunov Z, Friedlander JI, George AK, et al. S.T.O.N.E. nephrolithometry: novel surgical classification system for kidney calculi. Urology. 2013;81(6):1154-1159. Read the source ↗
Worked example: S.T.O.N.E. 6 of 13 (stone area 400 mm^2) -- low complexity; higher scores carry a lower PCNL stone-free likelihood (low 5-6, moderate 7-8, high >=9).
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