Optimal duration of pre-stenting before RIRS: a prospective randomized study evaluating FANS-UAS placement success.
Bedreddin Kalyenci, Ferhat Çoban, Hasan Sulhan et al.
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In 30 seconds
This randomized controlled trial evaluated the effect of pre-stenting duration on flexible and navigable ureteral access sheath (FANS-UAS) placement in 221 patients undergoing retrograde intrarenal surgery (RIRS). The study found that FANS-UAS placement success significantly increased from 80.0% in the no pre-stenting group to 93.2% and 94.8% in the 2-4 weeks and 4-6 weeks pre-stenting groups, respectively (p=0.006).
Key findings
- FANS-UAS placement success was 80.0% in no pre-stenting, 93.2% in 2-4 weeks, and 94.8% in 4-6 weeks (p=0.006).
- Stone access time was significantly shorter in pre-stented groups (p<0.001).
- Successful RIRS rates were 87.1%, 94.6%, and 94.8% across the groups (p=0.146).
- Pre-stenting was the only independent predictor of successful FANS-UAS placement.
Why it matters
Understanding the optimal duration of pre-stenting can enhance procedural success in RIRS, potentially leading to better patient outcomes and reduced complications. This study provides evidence to guide clinical decision-making regarding pre-stenting practices.