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. 2014 Jul-Sep;4(3):54–73.

Table 2. Comparison of the characteristics and outcome of small and moderate size calculi subjected to microperc extraction.

Characteristics <1cm(n=5) 1-3cm(n=12) ALL(n=17) P value
Median operative time in minutes (mean± SD; range) 40 42.5 42.5 (47.9± 17.1; 30-90) 0.592
Median duration of hospital stay in hours(mean; range) 48 48 48 (56.4±18.4; 36-96) 0.109
Median Hemoglobin drop in g/dl [mean±SD; range] 0.85 1.25 1.2(1.25±0.85; 0-3.0) 0.495
Median tract size(Fr) 4.85 8 8 0.011
Stone clearance (n, %)
1st day 5(100) 9(75) 14(82.4) 0.331
1st month 5(100) 10(83.3) 15(88.2) 1
CIRF 0(0) 1(8.3) 1(5.9)
Conversion to miniperc (n, %) 1 1 2 0.512
Auxillary procedure (n, %) 0(0) 2(16.7) 2(11.8) 1
Check nephroscopy 0(0) 1(8.3) 1(5.9)
Miniperc 0(0) 1(8.3) 1(5.9)
Complications
Intraoperative complication 0(0) 1(8.3) 1(5.9) 1
Clavien II(Minor pelvic perforation) 0 1 1
Postoperative complications 0(0) 2(16.7) 2(11.8) 1
Clavien grade I(pneumonia) 0 1 1
Clavien grade I(renal colic) 0 1 1
Intraoperative Double-J stent (n, %) 0(0) 3(25) 3(17.6) 0.512
Postoperative Double-J Stent (n, %) 0 0 0 1
SD: standard deviation; n: Number; % :percentage