Table 4.

Irrigation Flow Rates mL/min (100 mm Hg Normal Saline)

		X2		XC
		Mean	SD	Mean	SD	Interaction P value
Empty	Flow	59.33	0.29	62.83	0.58	0.0007
Laser 200 μm	Flow	28.33	0.29	32.50	0.00	n/a
Laser 273 μm	Flow	26.50	0.00	28.00	0.00	n/a
Delta Wire Grasper (3.2F)	Flow	0.50	0.10	0.97	0.06	0.0022
1.7F Nitinol Stone Extractor	Flow	16.336.83	0.29	18.33	0.29	0.0011
1.7F Nitinol Stone Extractor	Flow		0.29	8.83	0.29	0.0011

SD=standard deviation.