Table 2 Operative and postoperative outcomes of two groups.

From: Therapeutic experience and key techniques of tubeless percutaneous nephrolithotomy

Variables

PCNL

Tubeless PCNL

t

P Value

Stone removal rate

100%

100%

-

-

Number of channels

One

Other

20

0

20

0

  

Mean operative time (min)

58.8 ± 29.0

57.1 ± 19.8

−0.217

0.830

VAS pain

2.8 ± 0.8

0.5 ± 0.5

−10.7

 < 0.001

Mean hospital stay (days)

2.1 ± 0.9

1.4 ± 0.5

−2.951

0.005

Raise of creatinine (umol/L)

4.2 ± 16.7

2.6 ± 7.9

−0.39

0.699

Drop of eGFR (ml/min/1.73m2)

1.7 ± 10.6

2.0 ± 6.9

0.095

0.924

Drop of Hb (g/L)

11.8 ± 8.4

12 ± 9.5

0.088

0.930

Fever (ratio)

0

0

  

Raise of neutrophils (× 109/L)

3.5 ± 3.0

2.5 ± 3.4

−1.0

0.307

Raise of PCT (ng/L)

0.16 ± 0.77

0 ± 0

−0.906

0.371

Raise of CRP (mg/L)

−2.1 ± 24.3

2.3 ± 5.1

0.755

0.455

  1. Hb: Hemoglobin; eGFR: Estimated glomerular filtration rate; PCT: Procalcitonin; CRP: C-reactive protein.