[Modelling the transjugular intrahepatic portosystemic shunt using a metal prosthesis: requirements of the stent].

Non-operative percutaneous treatment of portal hypertension as ultima ratio therapy in liver cirrhosis has now been established in 16 cases. After transjugular puncture of a main branch of the portal vein via a liver vein, recollapse of the parenchymal track after predilation was prevented by implantation of a Palmaz stent. This type of stent enables remodelling of the individual length of the parenchymal track in the liver by overlapping placement of several stents. In our experience the Palmaz stent seems to be very efficient in keeping the shunt patent. First, its smooth inner surface after dilation guarantees laminar flow within the stent as a precondition for homogeneous endothelialization of the inner surface. Second, overlapping placement of the stents allows precise covering of the individual length of the shunt. Third shunt diameters can be established by using different sized balloons. The range is 7-10 mm. Fourth this type of stent has a high degree of resistance to eccentric or concentric compression by the surrounding tissue.