Ureteroscope has the advantages of minimally invasive, high efficiency and few complications, and has greater advantages than traditional rigid scopes, especially because of its ability to bend, especially for the upper urinary tract, proximal ureter and intrarenal collecting system, which cannot be reached by rigid ureteroscopes, and has been increasingly used in urology. The advantages The use of traditional monolithic ureteroscopes has been hampered by their high cost of use due to their slim and fragile bodies and high maintenance costs. The new combined ureteroscope is a high-end minimally invasive surgical device developed by the German company Plastis, which is a detachable combined ureteroscope with stable and clear imaging, and the main core components can be disassembled and replaced at any time, solving the problem that the main parts of the traditional integral ureteroscope are easily damaged and the maintenance cost is too high. It consists of a reusable fiber-optic system and a single-use, sterile packaged, bendable, multi-channel endoscope trocar. The detachable nature of the mirror allows the operator to replace damaged parts whenever necessary to avoid interruptions in the procedure; the optical system uses a single fiber optic imaging technology, unlike the traditional structural form made of numerous quartz fibers compounded together, which not only improves the clarity of imaging, but also does not cause black spots and false images due to partial fiber breakage. Ureteral flexible microscope is mainly used for: 1. Diagnosis of upper urinary tract diseases, mainly from the localization and diagnosis of upper urinary tract hematuria, positive urinary exfoliation cytology, filling defects in contrast examination and follow-up after intracavitary treatment of upper urinary tract tumors; 2. Treatment of upper urinary tract diseases, mainly stones and tumors, especially for high ureteral stone location, <2cm kidney stones or stones in renal calyces and diverticula, etc.