ESPU Congress 2018 - Abstract Book

185 11–14 APRIL, 2018, HELSINKI, FINLAND MATERIAL AND METHODS Retrospective data for patients treated with percutaneous nephrolithotomy in a 3 year period were collected. Patients were divided into 2 groups by creatinine level, cutoff was set on 0.7. The patients who had creatinine level of <= 0.7 labeled as normal GFR (group 1) while > 0.7 level categorized as decreased GFR (group2). Normality was checked by Shapiro wilk test. Association of categori- cal variables was established by chi square test, Patient characteristics, Operative characteristics, outcomes and morbidity were assessed. RESULTS We evaluated 307 children in which male were 202(65.8 %) while female were 105(34.2 %), median age was 7. Median operative time was 80 minutes while median duration of stay in hospital was 4 days. Median length of stone was 1.5 cm while breadth was 1.3 cm. Most of stones were located in pelvic region (266), followed by 131 in lower calyx, 49 were in upper calyx and 40 were in mid calyx. In 301(98 %) patients single tract was made while double tract was made in 6(2 %) patients. Post-operative complications like need of blood transfusion, fever, pleural tap and urosepsis were not associated with deranged renal function (p value ≥ 0.05). Complete stone free rate was less in patients with decreased renal functions (p value=0.027). Pre-operative and post-operative dif- ferences of HB, HCT and creatinine levels were same in both groups of patients (p value ≥0.05). CONCLUSIONS PCNL is an effective feasible intervention for patients with chronic renal insufficiency and acceptable complication rates. Therefore, careful patient selection and through surgical practice is required to yield favorable outcomes. 12:34–12:39 S25-5 (VP) MINI PCNL AND MINI ECIRS WITH THE CLEARPETRA SYSTEM IN A PEDIATRIC COMPLET STAGHORN STONE Erika LLORENS  1 , Jose CARPIO  1 , Oriol ANGERRI  2 and Anna BUJONS  1 1) Fundacio Puigvert, Pediatric urology Unit, Barcelona, SPAIN - 2) Fundacio Puigvert, Lithiasis unit, Barcelona, SPAIN PURPOSE We present a complete staghorn stone treated with mini PCNL and mini ECIRS using ClearPetra system. The ClearPetra System for Continuous Flow Lithotripsy is designed for the effective and efficient treatment of urinary stones using Negative Pressure Aspiration through an oblique side port on the ClearPetra sheath. It has high stone clearance rate, reduces the intra-luminal pressure in the urinary tract, prevents stone retropulsion, improves visual field, obviates the need of stone baskets, forceps, or any anti-retropulsion devices, and saves operating time. MATERIAL AND METHODS Supine Mini PCNL was performed on an 8-year-old male patient with a CT scan showing a right sided complete staghorn stone with a density of 1100HU. ClearpetraR 12–14Fr aspiration sheath was used. Dusting was performed with the LumenisR PulseTM 120H holmium laser using a 550um laser fiber. Three weeks after first surgery an mini ECIRS was performed in the Valdivia-Galdakao position via Clearpetra sheath percutaneously and using the Storz Flex-Xc ureteroscope retro- gradely. A nefrostomy tube and ureteral cateter were placed at the end of surgery.