Stent

Details Stent Stent

2001-02-01

2003-03-18

McDermott, Corrine (Department: 3738)

Prosthesis (i.e., artificial body members), parts thereof, or ai

Arterial prosthesis

Stent structure

C623S001210

Reexamination Certificate

active

06533809

ABSTRACT:

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not Applicable
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a stent.
2. Description of the Related Art
A stent is a medico-technical device which is inserted and guided to restricted portions of body vessels or body orifices and in its expanded state expands and keeps expanded the restricted portion at such a place. To this end, a stent must be extremely flexible in its non-expanded state so that upon introduction into the body vessels it can easily follow the windings of said vessels. Furthermore, the stent in its expanded state must be sufficiently stable to maintain the desired degree of expansion.
Although the generic stent (DE 296 08 037.1) already meets these requirements in a satisfactory manner, a further improvement of the stent characteristics is in principle desirable.
It is therefore the object of the present invention to provide a stent comprising a tubular, flexible body whose wall has a web structure, whose characteristics regarding flexibility in the non-expanded state and dimensional stability in the expanded state are further improved.
BRIEF SUMMARY OF THE INVENTION
The inventive stent is characterized by an improvement of its characteristics which as such are opposed, i.e., high flexibility in the non-expanded state and high dimensional stability in the expanded state.
The stent according to the invention provides a construction whose web structure comprises a plurality of adjoining cells. In different embodiments the web structure may be composed of webs or legs which have different structures and surround cells.
According to the invention at least one spring element is provided per cell. The spring element can for instance be a U- or V-shaped loop in one of the webs or legs of each cell. Hence, it is possible with the invention to form a multicellular stent which comprises a plurality of e.g. diamond-like cells or at least cells that resemble diamonds. The legs or webs which surround the cells or diamonds may here comprise the spring elements which in the non-spread state permit sufficient flexibility across the longitudinal axis.


REFERENCES:
patent: 5449373 (1995-09-01), Pinchasik et al.
patent: 5607442 (1997-03-01), Fischell et al.
patent: 5697971 (1997-12-01), Fischell et al.
patent: 5733303 (1998-03-01), Israel et al.
patent: 5776161 (1998-07-01), Globerman
patent: 5776183 (1998-07-01), Kanesaka et al.
patent: 5807404 (1998-09-01), Ritcher
patent: 5810872 (1998-09-01), Kanesaka et al.
patent: 5827321 (1998-10-01), Roubin et al.
patent: 5836964 (1998-11-01), Richter et al.
patent: 5853419 (1998-12-01), Imran
patent: 5855600 (1999-01-01), Alt
patent: 5861027 (1999-01-01), Trapp
patent: 5868781 (1999-02-01), Killion
patent: 5876449 (1999-03-01), Starck et al.
patent: 5895406 (1999-04-01), Gray et al.
patent: 5922021 (1999-07-01), Jang
patent: 296 08 037 (1996-08-01), None
patent: 296 15 969 (1996-12-01), None
patent: 297 08 689 (1997-08-01), None
patent: 297 08 879 (1997-09-01), None
patent: 297 16 476 (1998-02-01), None
patent: WO 9603092 (1996-02-01), None
patent: WO 9732543 (1997-09-01), None

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