NGHIÊN CỨU GIÁ TRỊ DỰ ĐOÁN CỦA GUY’S STONE SCORE VÀ S.T.O.N.E NEPHROLITHOMETRY SCORE TRONG LẤY SỎI THẬN QUA DA ĐƯỜNG HẦM NHỎ DƯỚI HƯỚNG DẪN SIÊU ÂM KẾT HỢP C-ARM

Abstract

Objective: To evaluate the predictive value of Guy’s stone score and S.T.O.N.E nephrolithometry score for stone-free rate and complications after mini-Percutaneous nephrolithotomy under ultrasound guidance combined with C-Arm. Methods: This was a prospective cross-sectional study conducted at the University of Medicine and Pharmacy Hospital in Can Tho from November 2022 to October 2024. A total of 95 patients undergoing  mini-Percutaneous nephrolithotomy under ultrasound guidance combined with C-Arm. Stone-free rate was evaluated by ultrasound and X-ray on the second postoperative day. Results: The stone-free rate was 75.8%. Both Guy’s stone score (p = 0.002) and S.T.O.N.E nephrolithometry score (p < 0.001) showed significant associations with stone-free outcomes. Logistic regression confirmed that Guy’s stone score (OR = 0.63) and S.T.O.N.E nephrolithometry score (OR = 0.70) were independent predictors. The AUC for Guy’s stone score and S.T.O.N.E nephrolithometry score was 0.625 and 0.645, respectively. The overall complication rate was 11.6%, mostly mild, with no Clavien-Dindo grade ≥ III. Conclusion: Guy’s stone score and S.T.O.N.E nephrolithometry score are both useful tools for predicting outcomes in mini-Percutaneous nephrolithotomy under ultrasound guidance combined with C-Arm. Combining the two scores may improve prediction accuracy, support clinical decision-making, and reduce complications in kidney stone surgery.