YẾU TỐ NGUY CƠ NHIỄM KHUẨN TIẾT NIỆU VÀ GIÁ TRỊ DỰ BÁO CỦA CÁC CHỈ SỐ NLR VÀ SII TỪ CÔNG THỨC MÁU Ở BỆNH NHÂN SỎI THẬN

Abstract

Objective: To identify risk factors for urinary tract infection (UTI) and to evaluate the predictive value of NLR và SII in patients with kidney stones. Methods: A cross-sectional descriptive study was conducted on 315 patients aged ≥18 years who were diagnosed with kidney stones at Saint Paul Hospital from July to October 2025. UTI was defined based on clinical symptoms, complete blood count, and urinalysis findings. Clinical, metabolic, renal function, imaging characteristics, and inflammatory markers (WBC, NLR, MLR, SII) were collected prior to intervention. Receiver operating characteristic (ROC) analysis was used to assess the predictive value of NLR and SII. Results: The prevalence of UTI was 48.6%. Type 2 diabetes mellitus, decreased glomerular filtration rate, stone size >10 mm, and hydronephrosis ≥ grade 2 were significantly associated with UTI. NLR and SII demonstrated acceptable sensitivity and specificity in predicting UTI and risk stratification before intervention. Conclusion: UTI is a common complication in patients with kidney stones. Diabetes mellitus, impaired renal function, and imaging characteristics increase the risk of infection. NLR and SII may serve as useful tools for pre-intervention risk stratification.