The Single Wire Ureteral Access Sheath, Both Safe and Economical

Table 2

Baseline characteristics for three instrumentation groups.

Number of procedures	Classic	Flexor	Std. access	p value
	Age (mean)	60	64			58	0.566
Male	13	9	8	0.485
Procedure type
Initial surgery	19	10	12	0.176
Second look	10	5	1
Largest stone (mean, cm)	1	1	1	0.771
Number of stones (mean)	1	1	2	0.220
Location of stones
Ureter	7	6	5	0.468
Pelvis	11	2	3	0.205
Lower pole	8	1	5	0.129
Interpolar	1	3	2	0.192
Upper pole	3	4	3	0.337
Total stones identified	30	16	18
Laterality
Left-sided stones	17	10	10	0.510
Right-sided stones	8	4	5	0.739
Bilateral stones	4	2	3	0.714

ANOVA.
Pearson chi-squared.