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Updated: Jan 25, 2026

Laparoscopic Cholecystectomy with Indocyanine Green Fluorescence: Choledochoscopic Stone Extraction and Primary Duct Suture
Published on: November 25, 2025
Factores predictores del estado libre de cálculos en la primera ureteroscopia flexible con litotricia láser
Efraín Maldonado-Alcaraz1, Mario Alberto Ramírez-Negrín1, Juan Rodríguez-Silverio2
1Instituto Mexicano del Seguro Social, Centro Médico Nacional Siglo XXI, Hospital de Especialidades. Ciudad de México, México.
Introduction:
Flexible ureteroscopy and laser fragmentation (FURSL) is a minimally invasive modality for surgical treatment of renal stones. Inadequate selection of patients for this treatment generates a cost-effectiveness unbalance.
Objective:
To know the stone-free rate predictors in a single surgical time in patients undergoing FURSL.
Method:
Retrospective cohort of patients undergoing FURSL. Global and gender-categorized univariate and multivariate (logistic regression) analyses were performed to identify stone-free predictors at first FURSL.
Results:
Stone-free rate at first FURSL was 73.62%. Predictors in males were patient age and stone size, density and multiplicity; in females, body mass index and multiplicity of stones.
Conclusions:
Stone-free rate predictors at first FURSL are different in males and females. Women with overweight and obesity probably have easy-to-fragment and easy-to-extract stones associated with uric acid.
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