Efficacy of SMART Stent Placement for Salvage Angioplasty in Hemodialysis Patients with Recurrent Vascular Access Stenosis

Table 3

Secondary patency for SMART stent placement in AVF and AVG cases.There was no significant difference in secondary patency rates between AVF and AVG cases, but patency in AVG showed inferior to AVF. The rate of outflow stenosis onset was significantly higher in AVF cases (𝑃=0.045).

	All	AVF	AVG	𝑃 value
𝑛	50	25	25
Secondary patency (Days)	189 ± 129	224 ± 129	151 ± 121	n.s.
(range)	(18–259)	(18–241)	(63–259)
Secondary patency (%)
3 months	83.4	88.5	75.5
6 months	74.2	82.6	61.8	0.1299
12 months	68	74.4	61.8
Reasons of primary patency failure
In-stent stenosis (%)	14 (28)	6 (24)	8 (32)	n.s.
Out-flow stenosis (%)	4 (8)	4 (16)	0 (0)	0.045
Others (%)	5 (10)	2 (8)	3 (12)	n.s.