Retrograde intrarenal surgery combined with flexible vacuum-assisted ureteral access sheath versus traditional ureteral access sheath for 1-2 cm lower calyceal renal stones: a prospective, randomized controlled study

Our findings suggest that the combination of FV-UAS and RIRS offers a promising treatment approach for 1-2 cm lower calyceal renal stones. This method results in higher SFRs, lower complication rates, and reduced hospitalization costs, making it a valuable technique for clinical adoption.