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Article History

Received: 16 January 2025

Accepted: 5 May 2025

First Online: 26 May 2025

Declarations

:

: The authors declare no competing interests.

: The authors certify that there is no conflict of interest with any financial organization regarding the material discussed in the manuscript.

: All authors have approved the final version of this manuscript and there is no conflict of interest to declare. Our manuscript has not been published previously or is under consideration for publication elsewhere.

: the study was approved by the institutional research ethics committee before the recruitment process of our study was started and that has been conducted per the principles outlined in the Helsinki Declaration. The study was approved by the Research Ethics Committee of the Faculty of Medicine Ain Shams University, Cairo, Egypt. (FWA000017585) with ethical approval number: (MD 351/2023). The study was registered at Clinicaltrial.gov, with a registration number: NCT06249100. (prospective registration)

: Written consent was obtained from all patients’ parents or legal guardians before participation.

: Sample size was calculated using G-power 3.1.9.2 program, setting the type-1 error (α) at power at 80%. Results from a previous study (Abdulmecit Yavuz et al., 2020) showed that The SFR was 76% for the RIRS group compared to 94%; for the mini PCNL group ( p  < 0.001). Calculation according to these values produced a sample size of 61 cases in each group (122 total). However, the study will include 65 cases in each group (130 total) to account for dropout cases.