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11–14 APRIL, 2018, HELSINKI, FINLAND
12:19–12:22
S25-2 (PP)
MICRO-URETEROSCOPY FOR THE TREATMENT OF DISTAL
URETERAL CALCULI IN CHILDREN UNDER TWO YEARS
OLD
Anna BUJONS, Erika LLORENS and Andres KANASHIRO
Fundació Puigvert, Pediatric Urology Unit, Barcelona, SPAIN
PURPOSE
To demonstrate the efficacy and safety of micro-ureteroscopy (microURS) in the management of
distal ureteral stones in children under two years old.
MATERIAL AND METHODS
A prospective study was carried out in 6 children, who had undergone micro-URS between
November 2015 and April 2016 with the indication of distal ureteral calculi: The indications were:
two cases in which fragments remained in the distal ureter after SWL, two cases of steinstrasse and
2 cases of ureteral distal stones. The procedures were performed with the patient in the lithotomy
position under general anesthesia using the standard URS technique with a micro-ureteroscope
that has a caliber of 4.85Fr all along its length use of 200µ holmium laser fiber to fragment stones
in relevant cases and the 1.8Fr basket nitinol. Demographics, perioperative data, and outcomes
were assessed.
RESULTS
Right (n = 2) and left (n = 4) ureteral stones were detected in the respective number of patients.
The mean age of the children was 12.1 months (range, 6–24 months). The median stone size
was 10 mm (range, 5–13 mm). The median operative time was 36.8 min (range, 20–60 min. In
no case the placement of Double J catheter was required. As a postoperative complication mild
hematuria (Clavien grade 1) was observed in one case and resolved spontaneously. Intraoperative
minor or major complication did not occur in any of the cases. The mean hospitalization time was
24 h (range, 24–48 h). Stone-free status was accomplished in all patients in the final assessment.
CONCLUSIONS
The outcomes of micro-URS can be used safely and effectively in the treatment of distal ureteral
stones in children under two years old. Further prospective and comparative studies comparing
instruments of different sizes are warranted.
12:22–12:28
Discussion