Efficacy of modified Guy's stone score system in predicting stone-free rate after PCNL
10.3760/cma.j.issn.1000-6702.2012.10.016
- VernacularTitle:改良 Guy's 肾结石分级法在预测经皮肾镜取石术后清石率中的应用研究
- Author:
Weiguo HU
;
Jianxing LI
;
Bo YANG
;
Xiaobo HUANG
;
Xiaofeng WANG
- Publication Type:Journal Article
- Keywords:
Percutaneous nephrolithotomy;
Kidney calculi;
Surgical management;
Guy's stone seore system
- From:
Chinese Journal of Urology
2012;33(10):771-773
- CountryChina
- Language:Chinese
-
Abstract:
Objective To modify the Guy's stone score system and evaluate the validation of the modified score system in grading the complexity of percutaneous nephrolithotomy (PCNL) and predicting the stone-free rate after PCNL. Methods The modified system comprises 4 grades:grade Ⅰ,solitary stone in mid/lower pole or solitary stone in the pelvis with simple anatomy; grade Ⅱ,solitary stone in upper pole or multiple stones (located in 2 or more 2 calyces) in a patient with simple anatomy or a solitary stone in a patient with abnormal anatomy; grade Ⅲ,multiple stones in patients with abnormal anatomy or stones in a caliceal diverticulum or partial staghorn calculus; grade Ⅳ,staghorn calculus or any stone in a patient with spinal injury or spine malformation ( e.g.spina bifida,scoliosis,lordosis) ; kidney dysplasia ( e.g.duplex kidney,horseshoe kidney).It was validated on a database of 145 PCNL procedures performed by a single surgeon in a stone center.The clinical outcomes were retrospectively assessed with multivariate analysis.Results Of the 145 PCNL patients,according to Guy's stone score system and the modified score system,there were 22 G1 cases (15.2％) and 22 SFR cases (100.0％) ; 27 G2 cases (18.6％) and 25 SFR cases (92.6％); 36 G3 cases (24.8％) and SFR(31,86.1％); 60 G4 cases (41.4％) and 49 SFR cases ( 81.7％ ).Showing that the modified Guy's stone score was more accurate in predicting stone-free rate after PCNL ( P ＜ 0.05 ). Conclusions The modified Guy' s stone score system can accurately predict the stone-free rate after PCNL than the old system.
