Catheter with a vessel support

摘要

A catheter with a cylindrical vessel support (5) of the self-expanding type is made of a permeable network of mutually crossing, rigid threads (6) and comprises a tubular outer catheter shaft (3) which receives the tensioned vessel support (5) on its distal end, and an inner catheter (4) which is displaceable in the outer catheter (3) and exposes a passage for a guide wire (9) in its interior. On its proximal end the vessel support (5) is secured in its tensioned state such that it forms a permeable network cone (7). This catheter is to be developed further in such a way that it can be advanced under secure guidance along a guide wire, that it does not collect any vascular fluid during its advance in the vessel and that it prevents injuries to the vessel wall by the edge of the distal catheter opening. For this purpose, the invention proposes that the rigid threads (6) forming the network be joined again at their ends and anchored distally on a tip (10), so that a second network cone (11), which is arranged as a mirror image to the first cone, is formed on the distal end of the vessel support (5). The tip (10) on which the threads (6) are anchored allows the guide wire (9) to pass through in its inside and is shaped on the outside such that it seals the distal opening of the outer catheter (3) when the latter completely receives the tensioned vessel support (5). When the tip (10) seals the outer catheter (3) it extends distally in a manner such that its distal end tapers relative to the distal opening of the outer catheter (3).