Table 2.
Studies investigating the performance of VTS ePTFE-SGs when underdilated to a caliber smaller than their nominal diameters.
| Study | Design/Pts | Nominal Ø (mm) | Under-Dilation (mm) | Imaging | Sites of Measurement | Type of Measurement | Assessment of Clinical Outcomes |
|---|---|---|---|---|---|---|---|
| Gaba et al., 2015 [75] | Retro; 61 | 10 | 8 | CT | IP tract | Cross-sectional Ø from the midportion of the metal wall | No |
| Pieper et al., 2015 [112] | Retro; 29 | 8 (n = 1) 10 (n = 28) | 7 (n = 1) 8 (n = 28) | CT | PVW, IP, HVW | Cross-sectional area at each site | No |
| Borghol et al., 2016 [113] | Retro; 16 | 10 | 8 | Digital angiography | Gold ring marker-IP-HVW | Mean internal stent Ø | No |
| Pieper et al., 2017 [114] | Prosp; 20 | 10 | 8 | US | IP tract excluding PVW and HVW | Mean of 10 Ø measurements from the midportion of the wall reflex | No |
| Schepis et al., 2018 [24] | Retro; 226 Prosp: 142 | 8–10 | 6 | CT | PVW and HVW | Mean of the largest cross-sectional inner Ø | Yes |
Ø = diameter; Abbreviations: CT, computed tomography; HVW, hepatic vein wall; IP, intraparenchymal; Pts, patients; Prosp, prospective; PVW, portal vein wall; Retro, retrospective; US, ultrasound.