Single-step renal dilatation in percutaneous nephrolithotomy: A prospective randomised study

Peer review under responsibility of Arab Association of Urology.

Figures & data

Figure 1 Puncture of the lumbodorsal fascia.

Figure 2 RD using the 30-F Amplatz dilator.

Table 1 Perioperative variables and outcome of the procedures.

Mean (SD), n/N or n (%) variable	Alken dilator	Amplatz dilator
No. of patients	25	24
Age (years)	38.2 (13.5)	43.8 (14)^⁎
Sex, M/F	16/9	17/7
Stone site, R/L	15/10	14/10
BMI, kg/m^2	25.7 (0.51)	25.9 (0.9)
No. of stones	2.0 (1.22)	2.2 (0.7)
Stone burden (mm)	30.2 (6.9)	30.7 (7.2)
Preop haemoglobin	13.5 (1.8)	13.2 (1.34)
Level (g/dL)
Outcomes
Operative duration (min)
Median (range)	110 (90–210)	85 (60–160)
Mean (SD)	124.9 (29.3)	100.9 (29.3)^⁎
X-ray exposure (min)
Median (range)	12 (6–20)	10 (4–19)
Mean (SD)	11.8 (0.42)	10.5 (4.7)^⁎
Failure of access	0	0
Stone clearance	24 (92)	22 (91)
Postop haemoglobin	11.4 (1.75)	11.6 (1.33)
Level (g/dL)
Complications
Grade 1	3 (12)	4 (16)
Grade 2	5 (20)	3 (13)
Grade 3	1 (4)	1 (4)
Total	9 (36)	8 (33)
Transfusion rate	1 (4)	1 (4)
Organ injury	0	0
Hospital stay (days)
Median (range)	5 (3–8)	5 (3–8)
Mean (SD)	4.6 (1)	4.3 (1)

⁎ P < 0.05.