Dilatation catheter
OwnerErnst P. Streckerinventor
Life of this patent
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Abstract
Mounted on the catheter is an endoprosthesis which can be inserted into a vessel, for example, in a predetermined position, radially expandable, implantable at the expansion site, where it is subsequently retained in place. The endoprosthesis can encompass a section of the catheter by its own radial tension and can thereby be retained in an essentially fixed position, without axial play, while its separation from the catheter is effected by radial expansion during implantation. The endoprosthesis may, however, also be mounted on the catheter in an essentailly fixed position, without axial play, by mechanical means ceasing to be effective after the implantation because of radial expansion, or which can be eliminated after the implantation so as to enable the catheter to be withdrawn.
Claims24
A tubular endoprosthesis device having a wall structure comprised of an open fabric of loosely interlocked loops of filament material, the device having a first relatively small diameter form for low profile introduction to a body passageway while encircling a radially expandable section of a catheter, said loops being capable of progressive permanent deformation with attendant radial expansion of the open fabric in response to increasing expansion of said expandable section of the catheter.
A catheter having an expandable section, and a tubular endoprosthesis device disposed on said catheter, surrounding said section, the wall structure of said device being comprised of an open fabric of loosely interlocked loops of filament material, said loops being capable of progressive permanent deformation, with attendant radial expansion of the open fabric from a first relatively small diameter form, in response to increasing expansion of said expandable section of said catheter.
In a tubular endoprosthesis device having a wall structure comprised of filament material, the device having a first relatively small diameter form for low profile introduction to a body passageway while encircling a radially expandable section of a catheter, said device being radially deformable by expansion of the catheter section from said first form to a permanent, radially expanded form, said device in said expanded form being capable of maintaining engagement with the bounding wall of said passageway,
- the improvement wherein the wall structure of said device is comprised of a tube-like, knitted open fabric of loosely interlocked loops of metallic filament material, said tube-like fabric being radially inwardly deformed relative to its as-knit form and having clearance between loops, said loops being capable of progressive permanent deformation with attendant radial expansion of the open fabric in response to increasing expansion of said expandable section of the catheter.
Dependencies are inferred from the claim text.