Results of the use of the method of mini-percutaneous nephrolithotripsy in children with urolithiasis
Arustamov L.D., Rudin Yu.E., Merinov D.S., Vardak A.B.

Research Institute of Urology and Interventional Radiology named after N. A. Lopatkin

Aim: to determine the main advantages of the mini-percutaneous nephro-lithotripsy (mini-PNL) method in pediatric patients with urolithiasis, according to the standard evaluation criteria for this method.
Patients and Methods: 74 children aged from 1 year to 16 years with urolithiasis were enrolled in the study. The mean age 
of the patients operated with mini-PNL was 7.5 years. The study involved 51 (68.9%) boys and 23 (31.1%) girls. The results 
of treatment of patients after mini-PNL were compared with the results of 80 children who were operated with a standard PNL. The duration of the operation and hospitalization, possible complications and the effectiveness of the surgery (residual stones) were evaluated.
Results: in the mini-PNL group, complete removal from stones was observed in 90.5% of cases (in 67 of 74 patients), whereas after standard PNL the total removal was 86.2%. 3 patients (4%) required the repeated percutaneous surgery after mini PNL and 11 patients (13.7%) — after standard PNL. In the remaining 4 (5.4%) patients, residual stones were fragmented by remote shock wave lithotripsy. The duration of mini-PNL ranged from 30 to 150 minutes, the average duration was 45.5 minutes, which is comparable to standard PNL with the duration of 42.7 minutes. The average duration of stay in the clinic was 2.58 days (duration range 1—8 days). The main reason for the increase in bed-days was episodes of hyperthermia in the postoperative period. Blood transfusion was not required for any child both during the operation and in the postoperative period.
Conclusion: mini-PNL is effective (90.5%) for treating nephrolithiasis in children. This is a minimally invasive method for treating kidney stones with minimal possible kidney trauma.

Key words: percutaneous nephrolithotripsy, mini-percutaneous nephrolithotripsy, urolithiasis, children.
For citation: Arustamov L.D., Rudin Yu.E., Merinov D.S., Vardak A.B. Results of the use of the method of mini-percutaneous nephrolithotripsy in children with urolithiasis // RMJ. 2018. № 2(II). P. 118 –121.