Clinical Study Of The Application Of S.T.O.N.E. Nephrolithometry Scoring System In Predicting Complications And Stone Free Rate In PCNL

Objective:To investigate the clinical value of S.T.O.N.E.nephrolithonetry scoring system in predicting complications and stone free rate in PCNL.Methods:The clinical data of 590 cases of kidney calculi in The First Affiliated Hospital of Guangxi Medical University Urology Ward I from October 2009 to December 2015 were analyzed.The patient and stone-related factors, including sex, age, body mass index, ASA classification, kidney side,stone size, tract length, degree of hydronephrosis;operative factors, such as number and size of accesses, the calix of puncture, operative time, blood loss,length of hospital stay were investigated. Analyze the correlation between S.T.O.N.E.score and stone free rate, blood loss, operative time, length of hospital stay, complications.For statistical assessment, logistic regression was used to analysis the correlation of nephrolithometry scores based on S.T.O.N.E.scoring system with stone-free status, complications in PCNL.Linear regression was used to analysis the correlation of nephrolithometry scores based on S.T.O.N. E.scoring system with intraoperative estimated blood loss, length of hospital stay.Result:The S.T.O.N.E.nephrolithometry score was 7.25 ± 1.26 in this group. The stone-free rate was 75.6% (446/590).Complications occurred in 153 cases(25.9%) . There was significant difference in S.T.O.N.E.nephrolithometry score between stone-free group and residual stones group (t = -11.425, P =0.000). The S.T.O.N.E. score showed significant correlation with the postoperative stone-free status (P <0.01), and correlate with intraoperative blood loss, operative time, length of hospital stay(P <0.05), but not correlate with complications (P > 0.05).Conclusions:The S.T.O.N.E.nephrolithometry scoring system can predict postoperative stone-free status of PCNL , has a certain ability to predict perioperative situations and can be used for disease related assessment. However,further research is required to evaluate its performance in predicting complications in PCNL.The S.T.O.N.E. nephrolithometry scoring system is not perfect, still needs further improvement.