[Retrograde intrarenal surgery (RIRS). Technical complement for cases of acute lithiasis]

Area of Science:

• Urology
• Minimally Invasive Surgery
• Nephrolithiasis Management

Context:

• Retrograde intrarenal surgery (RIRS) is a key treatment for kidney stones.
• Fragment elimination can be challenging due to stone size or renal anatomy.
• Minimally invasive techniques are preferred for renal stone management.

Purpose:

• To evaluate the efficacy of RIRS with renal cavity washing for kidney stone removal.
• To assess the impact of stone size on RIRS outcomes.
• To determine the effectiveness of a minipercutaneous sheath for fragment lavage.

Summary:

• 37 RIRS procedures were performed on 35 patients with renal lithiasis, divided into groups based on stone size (<1.5 cm and >1.5 cm).
• The study utilized flexible ureteroscopy with Holmium laser lithotripsy and fragment extraction baskets.
• In cases with significant stone burden or altered anatomy, renal cavities were washed using a mini-percutaneous sheath to aid fragment drainage.

Impact:

• RIRS demonstrated high stone-free rates at 3 months (93.1%), particularly for smaller stones.
• Renal cavity washing proved beneficial in eliminating fragments, reducing retreatment rates.
• The procedure showed no instances of ureteral stenosis, highlighting its safety profile.