Comparison of a new stent and Wallstent for transjugular intrahepatic portosystemic shunt in a porcine model

Table 1 Scores of deployment factors

Stent types	Insert thru sheath	Tool function	Stent tracking	Balloon in/de flation	Stent expansion	Position	Catheter removal	Architecture & visibility
Cordis	1 ± 0.0	1 ± 0.0	1.07 ± 0.27	1 ± 0.0	1.14 ± 0.53	1.29 ± 0.61	1 ± 0.0	1.86 ± 0.54
Wallstent	1 ± 0.0	*	2.17 ± 0.84	*	1.00 ± 0.00	*	1.75 ± 0.87	2.42 ± 0.52

*Not applicable to the device.

Table 2 Recoil data in Cordis stent

Interval	Diameter (mm)				Length (CM)
	Proximal	Middle	Distal	Overall
Imm post-TIPS	7.46 ± 0.80	7.32 ± 0.70	7.43 ± 0.73	7.40 ± 0.73	4.35 ± 0.33
2 weeks	7.51 ± 0.79	7.25 ± 0.73	7.50 ± 0.74	7.42 ± 0.74	4.32 ± 0.32
Change (%)	+0.67	-0.96	+0.94	+0.27	-0.69

Imm: Immediately

Table 3 Recoil data in Wallstent

Interval	Diameter (mm)				Length (CM)
	Proximal	Middle	Distal	Overall
Imm post-TIPS	9.17 ± 0.94	7.42 ± 0.60	7.72 ± 0.71	7.98 ± 1.05	4.83 ± 0.42
2 weeks	9.28 ± 0.83	7.67 ± 0.53	7.94 ± 0.52	8.22 ± 0.90	4.58 ± 0.48
Change (%)	+1.2	+3.37	+2.77	+3.01	-5.18

Imm: Immediately

Table 4 Quantified histological proliferation in specimens with Cordis stent vs. Wallstent

Region	Thickness (mm)			Proliferation area/total area (%)
	Cordis stent	Wallstent	P value*	Cordis stent	Wallstent	P value*
Hepatic	2.04 ± 1.28	1.85 ± 0.96	0.66	57.49 ± 23.60	51.43 ± 24.61	0.74
Middle	1.42 ± 0.82	1.31 ± 0.87	0.63	49.89 ± 17.31	47.91 ± 20.12	0.60
Portal	2.46 ± 0.98	2.38 ± 0.23	0.61	71.88 ± 21.18	69.97 ± 29.45	0.57
Average	2.18 ± 1.07	2.00 ± 0.02	0.73	59.18 ± 23.06	51.66 ± 25.11	0.78

*Two-tail t test.