A Comparison of 2 Percutaneous Nephrolithotomy Techniques for the Treatment of Pediatric Kidney Stones of Sizes 10-20 mm: Microperc vs Miniperc.
OBJECTIVE
To compare outcomes of micro-percutaneous nephrolithotomy (PNL; microperc) with mini-PNL (miniperc) in the treatment of pediatric renal stones of sizes 10-20 mm.


METHODS
Patients aged <18 years who underwent PNL for renal stones of sizes 10-20 mm between August 2011 and March 2014 in 3 referral centers were reviewed retrospectively. Patients were evaluated in the following 2 groups: microperc (group 1) and miniperc (group 2). Demographics and perioperative parameters (fluoroscopy and operation time, hemoglobin drop, and stone-free and complication rates) were retrospectively analyzed.


RESULTS
A total of 119 patients were evaluated, including group 1 (n = 56) for microperc and group 2 (n = 63) for miniperc. We found mean stone sizes as 13.4 ± 3.4 and 14.8 ± 3.7 mm in the groups, respectively (P = .046). Mean operation and fluoroscopy times were 57.1 ± 31.2 minutes and 132.4 ± 92.5 seconds in the microperc group and 68.9 ± 36.7 minutes and 226.2 ± 166.2 seconds in the miniperc group, respectively (P = .110 and P <.001). Stone-free rates were similar in both groups (82.1% vs 87.3%; P = .433 and 92.8% vs 93.6%; P = 0673) on postoperative day 1 and at first-month follow-up. The mean hemoglobin drop in group 2 differed from that in group 1 significantly (P <.001). The difference of average hospitalization times was statistically significant (43.0 ± 15.4 vs 68.5 ± 31.7 hours; P <.001).


CONCLUSIONS
Our outcomes show that microperc may be preferred as an alternative to mini-PNL for the treatment of pediatric kidney stones of sizes 10-20 mm with comparable success and complication rates, as well as shorter hospitalization and fluoroscopy times.
Department of Urology, Faculty of Medicine, Mevlana University, Konya, Turkey. Electronic address: tunakaratag@gmail.com.
Tuna
T
Karatag
Department of Urology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey.
Abdulkadir
A
Tepeler
Department of Urology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey.
Mesrur Selcuk
MS
Silay
Department of Urology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
Mehmet Nuri
MN
Bodakci
Department of Urology, Faculty of Medicine, Mevlana University, Konya, Turkey.
Ibrahim
I
Buldu
Department of Urology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
Mansur
M
Daggulli
Department of Urology, Faculty of Medicine, Dicle University, Diyarbakir, Turkey.
Namik Kemal
NK
Hatipoglu
Department of Urology, Faculty of Medicine, Mevlana University, Konya, Turkey.
Mustafa Okan
MO
Istanbulluoglu
Department of Urology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey.
Abdullah
A
Armagan
D002648:Child; D005260:Female; D006801:Humans; D007669:Kidney Calculi / Q000473:pathology / Q000601:surgery*; D008297:Male; D009403:Nephrostomy, Percutaneous / Q000379:methods*; D012189:Retrospective Studies