Percutaneous nephrolithotomy in pediatric age group: Assessment of effectiveness and complications

Table 1 Mini- percutenous nephrolitotomy

Ref.	Year	Renal unıt	Mean age	Stone size (mean)	Tract	Mean operative time (min)	Initial SFR %	Complications (%, overall)
Ozden et al[24]	2010	100	9.5 yr	507.5 mm²	20.8 F (mean)	79.1	85	25
Zeng et al[25]	2012	20	20.6 mo	2.2 cm	14-16 F	77.5	95	NR
Resorlu et al[26]	2012	106	9.6 yr	23.7 mm	12-22 F	76.3	85.8	17
Yan et al[27]	2012	27	42.6 mo	1.85 cm	14-16 F	86.5	85.2	15
Wah et al[28]	2013	23	4.76 yr	3.44 cm²	16 F	109.4	83.6	14
Onal et al[29]	2013	1205	8.8 yr	4.09 cm²	Cutoff size 20 F	93.5	81.6	27.7
Elderwy et al[30]	2014	47	8 (median) yr	2.3 cm (median)	20-24 F	90	91.4	10.6
Desoky et al[31]	2015	22	9.5 yr	2.4 cm	20 F	65.1	90.9	36.3
Brodie et al[15]	2015	46	7.3 yr	NM	16 F	NR	76	NR

NR: Non reported; NM: Not measured; SFR: Stone-free rate.

Table 2 Modified clavien classification

Grade I	Any deviation from the normal postoperative course without the need for treatment
Grade II	Requiring pharmacological treatment with drugs Blood transfusions and total parenteral nutrition are also included
Grade III	Requiring surgical, endoscopic or radiological intervention
Grade IIIa	Intervention not under general anesthesia
Grade IIIb	Intervention under general anesthesia
Grade IV	Life-threatening complication requiring IC/ICU management
Grade IVa	Single organ dysfunction (including dialysis)
Grade IVb	Multiorgan dysfunction
Grade V	Death of a patient

ICU: Intensive care unit.

Table 3 Complication rates of mini- percutenous nephrolitotomy accoring to modified clavien classification

Ref.	Year	Renal unit	Overall complication rate (%)	Grade I-II (%)	Grade III (%)	Grade IV-V (%)
Ozden et al[24]	2010	100	25	21	4	-
Resorlu et al[26]	2012	106	17	17	-	-
Yan et al[27]	2012	27	15	15	-	-
Wah et al[28]	2013	23	14	13.6	0.4	-
Onal et al[29]	2013	1205	27.7	23.04	3.46	1.2
Pan et al[42]	2013	59	11.9	11.9	-	-
Elderwy et al[30]	2014	47	10.6	8.5	2.1	-
Desoky et al[31]	2015	22	36.3	22.7	13.6