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Background: The flexible and navigable suction sheath (FANS) is designed for the effective treatment of renal stones of various sizes. This study aimed to assess and compare the safety and postoperative outcomes at 30 days following FANS treatment for stones smaller and larger than 20 mm. Materials and Methods: From January to December 2024, patients undergoing retrograde intrarenal surgery performed with FANS were prospectively recruited and divided into two groups based on stone diameter (Group 1: DMAX t-test and chi-squared test with Yates' correction. Results: A total of 140 patients were enrolled, with 77 having stones p > 0.05) and re-intervention (p = 0.58) were observed, suggesting similar efficacy for both stone sizes. Conclusions: This study demonstrates that the FANS as a valuable tool for enhancing patient safety and outcomes in managing larger stones, achieving adequate SFR, and reducing the need for re-intervention without major complications. In the future, FANS may effectively change the indications for stone's treatment according to diameter.
Minore et al. (Mon,) studied this question.
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