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Could retrograde intrarenal surgery be a safe and effective alternative to mini-percutaneous nephrolithotomy ın the management of relatively large (20–30 mm) stones? A critical evaluation

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Abstract

Purpose

To compare the outcomes of mini-percutaneous nephrolithotomy (mPCNL) and retrograde intrarenal surgery (RIRS) in patients with renal stones sizing 2–3 cm.

Methods

A total of 566 patients from 6 institutions who underwent mPCNL (n = 440) and RIRS (n = 126) procedures were enrolled in our study. The retrospective patient cohort was reviewed and compared. Binary logistic regression analysis was performed to determine factors predicting success in the RIRS group.

Results

The stone-free rates were 91.1 and 77% for the mPCNL and RIRS groups, respectively (p < 0.001). The auxiliary procedure rates were 4.5 and 39.7% in the mPCNL and RIRS groups, respectively (p < 0.001). Mean values of hemoglobin decrease, fluoroscopy time, and hospitalization time were significantly higher in the mPCNL group (p < 0.001). While the Clavien grade 1–2 complication rates were 10.9 and 34.1% (p < 0.001) in two groups, these values were 2.7 and 1.6% (p = 0.539), respectively, for Clavien grade 3–4 complication rates. Although three patients in the mPCNL group received blood transfusions, none of the patients in the RIRS groups were transfused. The stone location and stone density parameters were found to be the independent predictive factors for RIRS success.

Conclusions

mPCNL provided a higher stone-free rate, less need for the auxiliary procedure, and lower complication rates compared to RIRS in patients with 2–3 cm stones. Blood loss, radiation exposure, and a hospital stay of mPCNL can be significantly reduced with the RIRS technique in selected patients.

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Data availability

All datasets used and analyzed during the current study are available from the corresponding author on reasonable request.

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Authors and Affiliations

Authors

Contributions

MA: Ibis protocol/project development, data collection or management, data analysis, manuscript writing/editing; MB: data collection or management, data analysis, manuscript writing/editing; MIG: manuscript writing/editing; YY: data collection or management, manuscript writing/editing; MAK: manuscript writing/editing; AB: protocol/project development, manuscript writing/editing; SV: data collection or management, data analysis; ST: data collection or management, data analysis; TT: manuscript writing/editing; MCK: protocol/project development, data collection or management; MGS: data collection or management; RE: data collection or management, data analysis; SG: manuscript writing/editing; KS: protocol/project development, manuscript writing/editing. All authors read and approved the final version of the manuscript.

Corresponding author

Correspondence to Muhammed Arif Ibis.

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The authors have no potential or financial conflicts of interest to declare.

Ethics approval

The study was approved by the Ankara University Faculty of Medicine Ethics Committee.

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Ibis, M.A., Gokce, M.I., Babayigit, M. et al. Could retrograde intrarenal surgery be a safe and effective alternative to mini-percutaneous nephrolithotomy ın the management of relatively large (20–30 mm) stones? A critical evaluation. Int Urol Nephrol 54, 2141–2148 (2022). https://doi.org/10.1007/s11255-022-03255-9

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