Ultra-mini percutaneous nephrolithotomy for the treatment of renal stones

Objective: To determine efficiency and reliability of the ultra-mini percutaneous nephrolithotomy (UMP) for the treatment of renal stones. Materials and Methods: A total of 35 patients who had UMP between October 2014-May 2015 was included to study with their demographic and operative datas prospectively. All patients performed after the standard introduction to the collecting system under fluoroscopy tract was dilated up to 13F in one stage. With 3,5 Fr. optic were entered into collecting system and found the stone and provided stone fragmentation with Holmium laser probe. The broken pieces of stone taken out with saline infizyo or with the help of basket. The process was terminated by tubeless or placing 10 Fr feeding tubes. Findings: Thirty-five patients has a mean age of 34.79 (2-83) years and body mass index 26.13 (17.6-32.8) kg /m2. Mean stone size was 26.1 mm (10-50). Three of them was solitary kidney patients in the study, and there were also two diverticulum stone and two of them had horseshoe kidney. Thirty-two (91.5%) patients had a success with a single akses while 3 patients (8.5%) was required in the second akses. Respectively there were 10 patients with isolated pelvic calculi, 10 patients with isolated lower calyx stones, 4 patients hade the pelvis and multiple calyx stones, 5 patients with partial choraliform stone, 4 patients with the pelvis and lower calyx stones and in two patients stones was in the diverticulum. Mean operation time was 82 min. (30-180), the average fluoroscopy time of 93.6 seconds (9-225), mean hemoglobin decrease of 0.6 g/L and blood transfusion is not necessary in any patients. (pain assessment chart) was detected 2 (0-6). Two postoperative ureteral stent was placed due to the wetting of the percutaneous access site and there was a patient with chest tube was inserted because of the development of hydrothorax. The average hospital stay was 2.3 days (1-7). In the first postoperative month assessment 32 (91.4%) patients were found completely stone free. Results: Ultra-mini PNL is an safe, effective and feasible method especially in the treatment of mid-sized kidney stones with high stone-free and low complication rates.