Vol. 45 (3): 639-639, May – June, 2019

doi: 10.1590/S1677-5538.IBJU.2018.0223


Diogo Nunes-Carneiro 1, João Ferreira Cabral 1, Avelino Fraga 1, Vítor Cavadas 1
1 Departamento de Urologia de Centro Hospitalar do Porto, Instituto de Ciências Biomédicas de Abel Salazar, Porto, Portugal


Introduction: During the last years there has been an effort in miniaturizing the endoscopic devices.

The video presents an alternative for the management of distal ureteral stone, using a ureteral access of 4.85 Fr and 27 cm of length, previously described as micro-ureteroscopy.

Material and Methods: This procedure was performed through a 3-part all-seeing needle, consisting of micro-optics 0.9 mm in diameter with a 120-degree angle of view, an irrigation channel and an integrated light.

Clinical Case: Seven year-old boy, with history of preterm birth (29 weeks) was referred to our consultation complaining of left back pain and an elevation of serum creatinine.

The renal ultrasound revealed a left ureterohydronephrosis, caused by a 10 mm stone located 13 mm from the uretero­vesical junction.

The patient underwent a micro-ureteroscopy with laser lithotripsy. The stone was fragmented with an average energy of 0.5 J with 12 Hz of frequency. The total energy spent was 12514 J. At the end of the procedure, a double J stent was placed.

The procedure lasted 45 minutes and was uneventful. The patient was discharged 24h after the procedure without com­plaints and remained stone free.

Conclusion: Micro-ureteroscopy is a safe and effective technique in distal ureteral lithiasis treatment in children. The small dimensions of the equipment increase the safety of the procedure making this a good option for the treatment of ureteral stones in children.


Available at: http://intbrazjurol.com.br/video-section/20180223_Nunes-Carneiro_et_al

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