| 摘要 |
A catheter with a cylindrical vessel support (5) consisting of a permeable net of intersecting rigid filaments (6), the vessel support (5) widening, upon its insertion, under its own force and by virtue of its radial elasticity, from a tensioned state with a small circumference to a released state supporting the vessel wall and having a large circumference remaining constant over its length; with a tubular outer catheter shaft (3), which at its distal end receives the tensioned vessel support (5) and from which the vessel support (5) can be released for its insertion; and with a displaceable inner catheter (4) in the inside of the tubular outer catheter shaft (3), which inner catheter axially supports the vessel support (5) at its proximal end, the outer catheter shaft (3) being pulled back relative to the inner catheter (4) for the purpose of releasing the vessel support (5). The catheter is to be further developed so that the vessel support (5) can be removed safely and without difficulties from the vessel (1) after a temporary period of insertion, and the vessel support (5) to be further developed is to be of the self-expanding type in order to ensure that the removable vessel support (5) can be used without risk. The catheter (2) is to be of as simple a design as possible and is to be simple and easy to use, and the flow of the medium is to be obstructed as little as possible during the temporary period of insertion of the vessel support (5) in the vessel. At the same time, a method is to be indicated for producing this catheter. To this end, it is proposed to secure the vessel support (5) gripped at its proximal end so that it forms a permeable conical net (7) opening automatically with the vessel support (5), the radius of the conical net (7) gradually increasing to the radius of the released vessel support (5), and to anchor the vessel support (5) firmly on the inner catheter (4) with the aid of the conical net (7). <IMAGE> |
