Ultra‐Efficient Kidney Stone Fragment Removal via Spinner‐Induced Synergistic Circulation and Spiral Flow

Kidney stones can cause severe pain and complications like chronic kidney disease. Although retrograde intrarenal surgery with laser lithotripsy is effective, current retrieval methods are inefficient, typically capturing only 1–3 fragments per ureteroscope pass and requiring many passes for full clearance. A novel spinner device that enables ultra‐efficient fragment removal through spinning‐induced localized suction is introduced. It generates spiral and circulating flows to capture fragments from over 20 mm away, eliminating the need to chase them. Optimized via computational fluid dynamics and validated in vitro and ex vivo, the spinner retrieves ≈60 small (0.5–2 mm) or ≈15 larger (2–3 mm) fragments per pass. It demonstrates nearly 100% capture of 60 fragments in bench tests and removes 45 fragments in 4 s in a porcine kidney model. This technology markedly improves procedural efficiency by reducing operative time, increasing stone‐free rates, and minimizing the number of ureteroscope passes.