Table 2 Operative characteristics and results

Tracts in one renal unit, mean (range)

1.8 (1–4)

Number of patients who underwent different sessions of PCNL

One session 4

Two sessions 14

There sessions 9

Operation time, min, mean (range)

78.7 (26–124)

Estimated blood loss, ml, mean (range)

97.3 (30–250)

Hospital stay, days, mean (range)

18 (10–31)

 1 session

11.8 (10–13)

 2 sessions

14 (10–18)

 3 sessions

27.7 (24–31)

Complete stone clearance rate within 3 sessions

24 (88.9%)

Postoperative serum creatinine, umol/L, mean (range)

116.8 (72.5–154.3)

Complications

Bleeding 2

Fever 6

Infection 2

Clavien-Dindo Classification, Grade (Number)

I (21); II (6)

Follow-up, months, median (range)

20 (2–42)

Recurrence

6

Nephrarctia

2