ArticleCardiovascular and interventional radiology2023
How Controlled is the Expansion of VIATORR CX?
Article in Cardiovascular and interventional radiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Hepatic Encephalopathy after Transjugular Intrahepatic Portosystemic Shunt Using Dedicated versus Generic Stent-Grafts in Cirrhotic Patients.Cardiovascular and interventional radiology · 2026Article
- Controlled expansion stent grafts versus legacy stent grafts for transjugular intrahepatic portosystemic shunt: a single-centre retrospective study on the incidence of hepatic encephalopathy.CVIR endovascular · 2025Article
- Transjugular Intrahepatic Portosystemic Shunt Placement: Entering the Era of Controlled Expansion.Cardiovascular and interventional radiology · 2023Article
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12 authors.
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No grant is acknowledged in the PubMed record.
Abstract
purposeTo investigate and compare the physical properties of the new generation Gore VIATORR-Controlled Expansion Endoprosthesis (VCX) to those of the predecessor VIATORR stent in an in vitro experimental setup. MATERIALS AND
methodsA total of 12 stents (8 VCX; 4 VIATORR; GORE, USA) were examined. Radial resistive force (RRF) and chronic outward force (COF) were assessed using a radial force testing machine (RX-650, Machine Solutions Inc., USA). To assess the radial forces of the VCX above 8 mm, balloon expansion was performed between cycles.
resultsAll VCX stents show an abrupt decrease in COF at an external diameter of 8.3 mm; RRF decreases likewise at an external diameter of 8.5 mm. The predecessor VIATORR stent without the "controlled expansion" feature shows linear radial force reduction until full expansion at a diameter of 10 mm. The physical properties of the VCX can be altered by balloon modulation. Point of COF (RRF) reduction shifts to 8.5 mm (8.6 mm), 8.6 mm (8.8 mm) and 9.3 mm (9.6 mm) following modulation with a 8 mm, 9 mm and 10 mm balloon.
conclusionsThe VCX shows an abrupt and disproportionate decrease in COF and RRF at an external diameter of 8.3 mm, thus passive expansion to its nominal diameter of 10 mm is not to be expected. By means of balloon dilatation the physical properties of the stent can be altered, enabling customized TIPS creation. The previous VIATORR stent shows continuous COF and RRF until total expansion.
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