Table 2 Operative and postoperative data, and outcome

Early stone-free rate

28/45 (62.2%)

26/45 (57.7%)

0.615

Late stone-free rate

40/45 (88.8%)

41/45 (91.1%)

0.780

Failed patients

 Stone retropulsion

2/45 (4.4%)

2/45 (4.4%)

–

 Residual fragment

3/45 (6.6%)

2/45 (4.4%)

0.644

Double-J stenting

29/45 (64.4%)

23/45 (51.1%)

0.043

Basket stone retrieval

17/45 (37.7%)

18/45 (40%)

0.711

Lithotripsy time (mean ± SD, min)

15.5 ± 12.2

17.3 ± 7.2

0.781

Operative time (mean ± SD, min)

40.7 ± 26.3

43.2 ± 21.6

0.632

Second session URS lithotripsy

7/45 (15.5%)

4/45 (8.8%)

0.048

Hospital stay ( mean ± SD, h)

46.6 ± 15.8

41.4 ± 16.3

0.647

Intraoperative complications

5/45 (11.11%)

2/45 (4.4%)

0.038

 Bleeding-caused procedure termination

1 (2.2%)

1 (2.2%)

 Mucosal laceration

3 (6.6%)

1 (2.2%)

 Ureteral perforation

1 (2.2%)

0

Postoperative complications

6/45 (13.3%)

4/45 (8.8%)

0.047

 Fever

2 (6.6%)

2 (4.4%)

 Hematuria for ˃ 3 days

1 (2.2%)

1 (2.2%)

 Urosepsis

1 (2.2%)

1 (2.2%)

 Stricture ureter

2 (4.4%)

0