Table 1.

Peri-operative data of 224 cases

Peri-operative parameters	Value
Stone size (cm)	2.2 ± 1.3
Hounsfield Unit Value	1019 ± 328
Stone Distribution
Renal Stone Only	93
Ureteral Stone Only	63
Renal and Ureteral Stone	68
Lower calyx involved	96
Pre-stented	220
Operation time(min)	69.2 ± 65.2
Use of basket(%)	32.6
Complications
Clavien grade I	2
Clavien grade II-IV	0
Stone-free rates
Immediate	76.8%
30 days postoperative	97.3%