Transjugular Intrahepatic Portosystemic Shunt Flow Reduction with Adjustable Polytetrafluoroethylene-Covered Balloon-Expandable Stents Using the "Sheath Control" Technique.

Abstract

A complication of transjugular intrahepatic portosystemic shunts (TIPS) placement is refractory portosystemic encephalopathy (PSE) often requiring TIPS reduction. We report the results of a "sheath control technique" utilizing constraining sheaths during deployment of polytetrafluoroethylene (PTFE)-covered balloon-expandable stents, minimizing stent migration, and providing additional procedural control. TIPS reduction was performed in 10 consecutive patients for PSE using Atrium iCast covered stents (Atrium Maquet Getinge Group, Germany). Within the indwelling TIPS stent, a 9mm×59mm iCast stent was deployed with 2cm exposed from the sheath's distal end and the majority of the stent within the sheath to create the distal hourglass shape. During balloon retraction, the stent was buttressed by the sheath. The proximal portion of the stent was angioplastied to complete the hourglass configuration, and the central portion of the stent was dilated to 5mm. Demographics, pre- and post-procedure laboratory values, and outcomes were recorded. Ten patients underwent TIPS reduction with 100% technical success. There was no stent migration during stent deployment. All patients experienced initial improvement of encephalopathy. One patient ultimately required complete TIPS occlusion for refractory PSE, and another developed TIPS occlusion 36days post-procedure. There was no significant trend toward change in patients' MELD scores immediately post-procedure or at 30days (p=0.46, p=0.47, respectively). TIPS reduction using Atrium iCast PTFE balloon-expandable stents using the "sheath control technique" is safe and effective, and minimizes the risk of stent migration.