Ultrasonography-guided Percutaneous Nephrolithotomy with Chinese One-shot Tract Dilation Technique Based on Stimulated Diuresis:A Report of 67 Cases

The safety and effectiveness of a novel Chinese one-shot dilation technique based on stimulated diuresis for percutaneous nephrolithotomy(PCNL) were investigated.After the feasibility of the Chinese one-shot dilation based on stimulated diuresis was verified by an animal study,this technique was applied in the clinical practice.A total of 67 patients in our department underwent the modified PCNL from July 2014 to June 2015.After the renal infundibulum was distended by stimulated diuresis,the kidney was punctured under the ultrasonographic guidance via the fornix of the target calyx.The working channel was dilated using a special designed pencil-shaped fascial dilator.The successful access rate,nephrostomy tract creation time,pre-and postoperative hemoglobin values and serum creatinine concentrations,stone-free rate and complications were recorded and analyzed.The renal infundibulum was successfully distended in all of the patients by the diuresis treatment.Under the ultrasonographic guidance,the successful access rate was 100% and the mean tract creation time was 2.0 min(range:1.5–5.0 min).The stone-free rate right after surgery was 91.0%.Although the postoperative hemoglobin was significantly reduced(P<0.01),transfusion was not clinically necessary.There was no significant difference in serum creatinine concentrations before and after operation(P>0.05).No severe complication occurred during or after the PCNL.It was suggested that this Chinese one-shot dilation technique based on stimulated diuresis is an efficient and safe innovation for PCNL,and is even helpful for those patients with non-dilated pelvicaliceal systems.