Single-port retroperitoneal renal biopsy using standard urological instruments.
OBJECTIVE
To describe the surgical technique and initial experience with a single-port retroperitoneal renal biopsy (SPRRB).


METHODS
Between January and April 2013, five children underwent SPRRB in our hospital. A single 1.5 cm incision was performed under the 12th rib at mid-axillary line, and an 11 mm trocar was inserted. A nephroscope was used to identify the kidney and dissect the perirenal fat. After lower pole exposure, a laparoscopic biopsy forceps was introduced through the nephroscope working channel to collect a renal tissue sample.


RESULTS
SPRRB was successfully performed in five children. The mean operative time was 32 minutes, and mean estimated blood loss was less than 10 mL. The hospital stay of all patients was two days because they were discharged in the second postoperative day, after remaining at strict bed rest for 24 hours after the procedure. The average number of glomeruli present in the specimen was 31.


CONCLUSIONS
SPRRB is a simple, safe and reliable alternative to open and videolaparoscopic approaches to surgical renal biopsy.
Department of Urology, Medical School, São Paulo State University (UNESP), Botucatu, SP, Brazil.
Rodrigo
R
Guerra
Department of Urology, Medical School, São Paulo State University (UNESP), Botucatu, SP, Brazil.
Flavio Vasconcelos
FV
Ordones
Department of Urology, Medical School, São Paulo State University (UNESP), Botucatu, SP, Brazil.
Hamilto Akihissa
HA
Yamamoto
Department of Urology, Medical School, São Paulo State University (UNESP), Botucatu, SP, Brazil.
Paulo Roberto
PR
Kawano
Department of Urology, Medical School, São Paulo State University (UNESP), Botucatu, SP, Brazil.
Joao Luiz
JL
Amaro
D016063:Blood Loss, Surgical / Q000517:prevention & control; D002648:Child; D061765:Endoscopic Ultrasound-Guided Fine Needle Aspiration / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006801:Humans; D007668:Kidney / Q000473:pathology*; D010535:Laparoscopy / Q000379:methods*; D007902:Length of Stay; D008297:Male; D061646:Operative Time; D015203:Reproducibility of Results; D012187:Retroperitoneal Space / Q000601:surgery*; D013997:Time Factors