CORRELATION BETWEEN S.T.O.N.E NEPHROLITHOMETRY SCORING IN PREDICTING FREE-STONE RATE AFTER PERCUTANEOUS NEPHROLITHOTOMY

• Main Authors: Karinda triharyu caesari putri, Tarmono Djojodimejo, Fikri Rizaldi, Sunaryo Hardjowijoto
• Format: Article
• Language: English
• Published: IKATAN AHLI UROLOGI INDONESIA 2017-03-01
• Series: Jurnal Urologi Indonesia
• Subjects: Percutaneous nephrolithotomy; scoring system; renal stone; non contrast CT Scan
• Online Access: http://juri.urologi.or.id/juri/article/view/281
• ISSN: 0853-442X; 2355-1402

Objective: To investigate free-stone rate after Percutaneous Nephrolithotomy (PNL) using S.T.O.N.E nephrolitometry scoring system, with regards of stone size (S), skin-to-stone distance (T), obstruction degree (O), number of calyx involved (N), and stone density (E) in Non Contrast CT Scan (NCCT). Material & methods: This is an analytic observational study on patients with renal stones undergoing PNL. All patients underwent NCCT before and after PNL; each variables was measured and counted for a total score. Post-operative evaluation was done using NCCT. Results: Thirty patients met inclusion criteria, 19 (63.3%) were stone-free, and 11 (36.7%) were with residual stone. Among the five variables, stone size (p=0.005), number of calyx involved (p=0.002) affected the outcome of surgery, while skin-to-stone distance, obstruction degree, and stone density did not. The overall total score of S.T.O.N.E nephrolithometry is correlated with the outcome of PNL (p=0.001). Conclusion: S.T.O.N.E nephrolithometry is a simple scoring system, while it is also easy to use, and can be used to predict the free-stone rate after PNL.