Determinants of Partial Stone Clearance after Mini-PCNL in the Pediatric Population

Abstract: Background: The prevalence of renal stones in pediatric population is increasing in Pakistan, to minimize the adverse outcomes of renal stone disease accurate diagnosis and proper management is necessary. Objective: This study aim to evaluate the risk factors of partial stone clearance after mini-PCNL in the pediatric population of Pakistan. Materials and Methods: This is a retrospective, cross-sectional study conducted at Godhra Hospital, Karachi, during 2021, patients diagnosed with single or multiple renal stones requiring PCNL were enrolled in the study, Guy’s stone score was used as a prediction method for complete clearance. SPSS version 22 was used to analyze the data, chi-square test was used to assess the significance of the data keeping a p-value ≤0.05 as significant. The risk estimation was analyzed with the help of the odds ratio test. Result: A total of 234 participants with mean age of 6.4 ± 4.8 years were enrolled. Stone clearance was reported 203 (86.7%) and 31 (13.2%) residual fragments. 09 (3.8%) out of the residual stone group needed intervention for complete clearance while the remaining were reported as stone free after 4 weeks with METs. The mean residual stone size was 0.7 ± 0.3, upon assessing the determinants maximum patients had Staghorn (> 4) cms stone size with 7 (2.9%) of patients out of 13 (5.5%). The odds of having partial clearance were reportedly positive with 2.34 in staghorn ≥ 4cms stone size and 1.62 in Grade IV Guy’s stone score. Conclusion: Stone size ≥ 4.0 cm and staghorn calculi present in all calyces are independent risk factors for partial stone clearance after Mini-PCNL.