This standard specifies the terms and definitions, classification and labeling, physical requirements, chemical requirements, biological requirements, marking, packaging and transportation of disposable ureteral introduction sheaths (hereinafter referred to as ureteral introduction sheaths) for ureteroendoscopic guidance instruments. and storage. This standard applies to disposable ureteral guide sheaths used to protect endoscopes and other surgical instruments from entering the urinary tract during flexible ureteroscopy surgery. Including but not limited to single-lumen sheaths and ureteral introduction sheaths with single-channel dilators.