RIRS (Retrograde Intrarenal Surgery) is a minimally invasive procedure used to remove kidney stones. It involves passing a small scope through the urethra and bladder into the ureter, then using laser energy to break up and remove the stones. This technique often allows for faster recovery and reduced risk compared to traditional surgery. It is procedure without cuts and blood loss with fastest recovery and least complications compared to PCNL. It has replaced traditional indications for stone treatment. Through normal urethral opening, all surgery is performed. So it's good for faster recovery and better clearance with advanced laser.