ArticleInternational braz j urol : official journal of the Brazilian Society of Urology
Acute Kidney Injury Following Mini Percutaneous Nephrolithotomy for Renal Stones: predictors and Follow-up Evaluation in Real-life Setting.
Article in International braz j urol : official journal of the Brazilian Society of Urology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo evaluate the prevalence, predictors, and progression of acute kidney injury (AKI) in patients undergoing mPCNL for nephrolithiasis. MATERIALS AND
methodsWe retrospectively analyzed data from 569 patients who underwent mPCNL at a single tertiary academic center (01/2016-10/2024). AKI was defined per KDIGO criteria as sCr increase >0.3 mg/dL or ≥1.5× baseline. Stone-free status was no residual stones on CT at 3-month follow-up. Complications were classified using the modified Clavien system. Kidney function was reassessed 30-90 days post-op. Descriptive statistics, logistic regression, and Cox regression were applied.
resultsMedian (IQR) age and stone volume were 57 (48-66) years and 2.1 (0.9-4.2) cm³. Median preoperative sCr and operative time were 0.9 (0.7-1.1) mg/dL and 90 (73-120) minutes. Post-mPCNL, 40 patients (7.0%) developed AKI. Complications occurred in 138 (24.2%) patients; 449 (78.9%) were stone-free. AKI patients had higher CCI (1.3 vs. 0.5, p=0.04), pre-op sCr (1.1 vs. 0.8 mg/dL, p<0.01), stone volume (5.7 vs. 2 cm³, p=0.02), and longer operative time (130 vs. 90 min, p=0.01). Complications were more frequent in AKI patients (42.5% vs. 22.8%, p=0.01). At multivariate analysis, operative time (OR 1.1, p=0.03), pre-op sCr (OR 3.8, p=0.001), and early complications (OR 2.5, p=0.02) were independently associated with AKI. AKI persisted in 9 (22.5%) patients, mainly those with complications (88.9% vs. 38.7%, p=0.01). On Cox analysis, lower BMI (HR 0.8, p=0.02) and absence of complications (HR 0.3, p=0.01) predicted faster AKI recovery.
conclusionAcute kidney injury remains a clinically significant complication following mPCNL.
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