Objective: To summarize the clinic experience of flexible ureteroscope in diagnosis and treatment of upper urinary tract disease. Method: From Nov 2013 to Dec 2015, 60 hematuresis cases underwent flexible ureteroscope for diagnosis and treatment of upper urinary tract. Clinical data was analyzed retrospectively. Results: All the cases were diagnosed and cured successfully in a one-time success .19 cases were diagnosed epithelium cancer, 6 cases were diagnosed non-specificity pyeloureteritis, 18

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... cases were diagnosed as calculus of ureter, and 8 cases were renal pelvis venous hemorrhage, no abnormality seen in 9 cases. No serious complication happened. And the time of the surgeries was 10~70 min and the average time was 40 min. Hospitalization time was 3~9 days, and the average time was 4 days. Conclusion: Flexible ureteroscope can be used to diagnose and cure tumor, calculus, inflammation and other diseases of upper urinary tract, especially, to upper urinary minimal lesion. Flexible ureteroscope has an obvious advantage. From Nov 2013 to Dec 2015, 58 hematuria patients underwent flexible ureteroscope for diagnosis and treatment of upper urinary tract diseases. Now we report as followed. Materials and Methods General Information 58 cases were in this group. 32 cases were male and other 26 cases were female; the average age was 42 years old.Course of these diseases were 1 ~ 2 months, and no other clinical symptoms and complications happened. We regularly checked out the blood coagulation time, routine urine, ultrasound, cystoscopy, intravenous urography angiography and CT examination ,but we failed to diagnose . The red blood cell in the urine mainly were normal form red blood cells. Equipment OLYMPUS-F8 flexible ureteroscope; Sony imaging system; Ultrasonic stone crush machine; ureteral expansion tube; Guide-wire; ureteral catheter; Double J ureteral catheter. Operation Method We used general anesthesia .First of all, we observed the bladder and ureter openings, and tried to do the ureteral intubation, and to observe the situation of ureter. Then we removed the cystoscope, put the OLYMPUS-F8 flexible ureteroscope in bladder and observed the ureter opening of the sick side.Along the work channel of flexible ureteroscope, we put a guide-wire International Conference on Biomedical and Biological Engineering (BBE 2016)