What is the safe and effective dilator number during access in PCNL? Three-shot dilation versus classical sequential Amplatz dilation

Table 3 Total access and total operation times of the study groups

	3SD (n = 138)	SAD (n = 145)	p
Total access time (sec) (mean ± SD) (median)	266.01 ± 50.17 (263)	443.42 ± 54.92 (440)	0.0001¹*
Total operation time (min) (mean ± SD) (median)	54.71 ± 37.63 (43)	60.1 ± 42.47 (45)	0.334¹

3SD Three-shot dilation, SAD Sequential Amplatz dilatation, SD Standard deviation
¹Mann-Whitney U test
*statistically significant

ISSN: 1471-2490