ePTFE/FEP stents for malignant biliary obstruction.

The use of the ePTFE/FEP-covered Viabil stent in the palliation of malignant obstruction where indicated is promising, providing a low rate of stent dysfunction and complications. More data need to be collected to conclusively ascertain whether covered stents have a longer patency and lower complication rate compared to uncovered stents.