Occlusion device, or occluder (closure device) for heart defects and their preparation

摘要

The present invention relates to a occlusion device 1 as well as a process for the production of an occlusion instrument 1. the occlusion device 1 consists essentially of nitinol, a material with shape memory function, wherein the basic shape via lasered shaped elements 2 is made from a tube. In the expanded state, the occlusion device 1 a proximal and a distal retention area 10, 9 as well as a there between cylindrical waist 13 arranged on. Due to the fact that the lasered shaped elements 2 specifically to the shape properties of the occlusion instrument 1 can be adapted, is achieved that the disks 11, 12 extremely flat against the septum wall and that, in the case of the occlusion device 1, no bulges or elongation caused by the shunt can occur such as the in the case of conventional braiding - occluders is possible. In the case of the production method according to the invention, a laser technology is used, in which the final shape of the shaped elements 2 in a corresponding nitinol tube is introduced by lasered recesses. Subsequently, the final shape of the occlusion instrument 1 by means of a suitable deformation - achieved and heat treatment processes can. Due to the variety of the lasing firmly connected to each other forming elements 2, the occlusion device 1 as a modified pfo -, asd -, - vsd and / or paravalvulärer leak - occluder be applied.