Only Size Matters in Stone Patients: Computed Tomography Controlled Stone-Free Rates after Mini-Percutaneous Nephrolithotomy.
Urol Int
; 103(2): 166-171, 2019.
Article
en En
| MEDLINE
| ID: mdl-30844789
ABSTRACT
OBJECTIVE:
To examine and predicting stone-free rates (SFRs) after minimally invasive-percutaneous nephrolithotomy (mini-PNL) based on computed tomography (CT), instead of X-ray or ultrasound control. PATIENTS ANDMETHODS:
We identified 146 mini-PNL patients with pre- and postoperative CT scans. Patient and stone characteristics were assessed. Stone-free status was defined as ≤3 mm residual fragment after mini-PNL according to postsurgery CT scan. Multivariable logistic regression analyses predicted stone-free status after mini-PNL.RESULTS:
Overall, 62 (42.5%) patients achieved stone-free status after mini-PNL. In multivariable analyses, stone size was the only independent predictor for stone-free status (OR 0.9; p = 0.02). Patients with stones > 20 mm were less likely to achieve stone-free status, than those harboring stones 10-20 mm (OR 0.3; p = 0.009). SFRs according to stone size categories (< 10, 10-20, and > 20 mm) were 33.3, 50.5, and 25%. Body mass index (BMI) and stone density (Houndsfield units) were no independent predictors for stone-free status after mini-PNL.CONCLUSIONS:
We report lower SFRs than expected. Stone size was the only independent predictor for stone-free status after mini-PNL. Patients with larger stones need to be informed about high risk of additional interventions. High BMI and high stone density do not represent a barrier for stone-free status after mini-PNL.Palabras clave
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Base de datos:
MEDLINE
Asunto principal:
Cálculos Renales
/
Tomografía Computarizada por Rayos X
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Nefrolitotomía Percutánea
Tipo de estudio:
Observational_studies
/
Prognostic_studies
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Risk_factors_studies
Idioma:
En
Revista:
Urol Int
Año:
2019
Tipo del documento:
Article