Study on advantages of F20 skin renal channel for minimally invasive percutaneous nephrolithotomy

Objective To explore advantages of the choice of F20 skin renal channel for minimally invasive percutaneous nephrolithotomy. Methods By using minimally invasive percutaneous nephrolithotomy for dealing with complex renal stones,skin renal channel was expanded to F20 with standard nephroscopy,third generation EMS ultrasound ballistic lithotripsy system had been applied for processing most of these stones in main calyces,then changed to Li Xun renal endoscopy without change of job shealth,and pneumatic ballistic lithotripsy was adopted for removal of residual calculi. Results Complex renal stones in 42 cases were completely removed by minimally invasive percutaneous nephrolithotomy. Among them,stones were completely removed in 35 patients at first phase of the operation. Residual calculi greater than 1 cm in 7 cases were removed by second operation without severe complications. Conclusion By establishing the F20 skin renal channel,flexibly using Li Xun renal endoscopy and standard renal endoscopy,the efficiency of operation has been improved,and complications have been avoided with high stone clearance rate.