The patient, male, 78 years old, was admitted to the second urology ward six months after surgery for bilateral hydronephrosis, uremia and rectal cancer, and was treated with hemodialysis after unsuccessful placement of double J-tube under cystoscopy. On the second day after hemodialysis, acute myocardial infarction appeared, so he was transferred to the cardiology care ward for treatment, and at the same time, hemodiafiltration was performed with the expectation of improving renal function, but renal function did not improve after half a month, and blood creatinine fluctuated from about 700umol/L to 1000umol/L. The patient’s hydronephrosis was not significant, and chest tightness worsened from time to time, so a consultation with a doctor from the second urology ward was requested. The decision was forced to perform a left nephrostomy. Considering that the patient had a new heart attack and applied high-dose anticoagulant drugs, as well as the uremic phase, all factors were likely to cause intraoperative hemorrhage and aggravation of the heart attack, endangering life. The operation went smoothly, and on the first day after the operation, the urine volume was 5000ml, and the blood creatinine decreased to 400umol/L. On the third day after the operation, the creatinine decreased to normal, and the general symptoms improved significantly, and he was discharged from the hospital. This is a true reflection of the value of B-ultrasound guided percutaneous nephrostomy. The whole procedure took less than ten minutes, and an F10 fistula tube saved a life, and there is no other treatment alternative. With the strong support of Director Shi Benkang and the assistance of sister departments, Zhang Dongqing and Zhou Changhuang independently carried out B-ultrasound-guided percutaneous nephrostomy, perirenal and subperitoneal fluid drainage, renal cyst puncture sclerosis, diagnostic fluid and mass puncture and other techniques in 2011, with dozens of patients treated over the past three years, with a 100% success rate and no case converted to open surgery. On this basis, the department has systematically carried out B-ultrasound guided percutaneous nephrolithotomy, which has cured nearly 200 patients, among which dozens of complicated kidney stones have undergone multi-stage and multi-channel lithotripsy with satisfactory results.