Vologda doctors mastered a new gentle method for removing kidney stones Urologists at the Vologda Regional Clinical Hospital performed a successful RIRS operation to remove kidney stones. RIRS - or retrograde intrarenal surgery - is a modern method for removing small kidney stones (up to 2 cm). The minimally invasive operation is performed without incisions, using a special endoscope. The doctor directs it through the urethra and bladder into the kidney and crushes the stones with a laser. After that, large stone fragments are removed with the help of a special basket trap, and the dust is removed on its own. All steps of the operation are broadcast on the computer screen. After five days, the patient can be released from the hospital (journalist Tatiana Mashirova, edited by Mikhail Prishchev).