Table 2.

Location and size stones and number of treatment

		Number of treatment sessions						Mean (session)
		1	2	3	4	6	10
	4.1-10.0 mm	4	1					1.2
Middle renal	10.1-20.0 mm	20	9	3	4			1.8
	≥ 20.1 mm	1	1	4	3	1	1	3.9
	4.1-10.0 mm	2						1
Lower renal	10.1-20.0 mm	3	3			1		2.1
	≥ 20.1 mm	1						1
	4.1-10.0 mm	66	9	2				1.2
Upper ureteral	10.1-20.0 mm	28	5	2				1.3
	≥ 20.1 mm	1						1
	4.1-10.0 mm	10		1				1.2
Middle ureteral	10.1-20.0 mm		1	1		1		3.6
	4.1-10.0 mm	1						1
Lower ureteral	10.1-20.0 mm	31						1
	≥ 20.1 mm	4	1					1.2
Total(n)		172	30	13	7	3	1	1.62