Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Arterial prosthesis – Stent structure
Patent
1990-08-23
1993-08-17
Isabella, David
Prosthesis (i.e., artificial body members), parts thereof, or ai
Arterial prosthesis
Stent structure
606151, 623 12, 604 53, 128830, A61F 206
Patent
active
052364461
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention concerns a tubular endoprosthesis for anatomical conduits or channels. Specifically, particular nonlimiting embodiments of this endoprosthesis are intended to permit the clearance of hardened conduits such as the trachea or bronchus, or to serve as a support for such anatomical conduits when they prove to be weak. Also described is an instrument to put this endoprosthesis in place.
2. Description of Background and Relevant Information
A hollow tube is disclosed in French Patent Document No. 1,130,165 for the treatment of hardening of the esophagus. The device constitutes a flexible tube with a ribbed external surface intended to be installed in a tumoral contraction to permit the passage of food.
This hollow tube has the drawback of not offering any guarantee that it will stay in place, because it can easily turn on itself, which can provoke irritation. Such irritation generates rejection spasms leading to axial shift of the tube, along with the serious consequences to which this shift can lead.
SUMMARY OF THE INVENTION
One of the objects of the present invention is to effectively remedy this serious insufficiency of known endoprostheses.
According to the invention, this objective is obtained by means of an endoprosthesis with a tubular body whose external surface is provided with numerous protuberances or asperities, preferably distributed over the entire surface, or a portion thereof. These protuberances consists of nipples with rounded tops, which are spaced from each other in the longitudinal and peripheral directions on the tubular body, and are preferably radially-oriented.
Another advantage of the endoprosthesis according to the invention is that it can be put easily in place and installs itself in a natural, extremely resistant fashion. In its implantation position, the prosthesis cannot, in effect, turn or slide axially when it is installed in the stenosis. In addition, this prosthesis may be made of a plastic material, such as an elastomer silicone, which is well tolerated by the organism whether healthy or ill, in whom it does not produce rejection spasms or trauma.
In another embodiment of the tubular endoprosthesis according to the invention, the nipples are arranged in lines with spaces in between them and are oriented along the rulings of the tubular body of the endoprosthesis.
The nipples can also be alternatingly distributed on the external surface of the tubular body.
In another embodiment of the tubular endoprosthesis according to the invention, at least one of its ends has an internal slanted wall. Optionally, both or all of its ends may have an internal slanted wall.
The goals, characteristics, and advantages above, and others, will be more apparent from the following description and the attached Figures.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the tubular endoprosthesis according to the invention.
FIG. 2 is a lengthwise cross-section of the tubular endoprosthesis shown in FIG. 1.
FIG. 3 is a transverse cross-section of the tubular endoprosthesis shown in FIG. 2.
FIG. 4 is an enlarged view, in detail, of a lengthwise cross-section of one of the ends of the endoprosthesis.
FIG. 5 is a front view of an embodiment of utilizing the endoprosthesis according to the invention, to permit tracheal bronchus clearance.
FIG. 6 is a view of the instruments permitting the placement of an endoprosthesis like the one illustrated in FIGS. 1-4.
FIGS. 7-11 show the operation of the placement instrument shown in FIG. 6 and the installation method for the tubular endoprosthesis according to the invention.
FIG. 12 is a front view of another embodiment of a tracheal bronchus endoprosthesis according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
We refer to the following embodiments to describe the non-limiting construction of this endoprosthesis, as well as the use of instruments permitting its installation.
The tubular endoprosthesis according to the invention can, as a function of the s
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Copy of International Search Report with annex.
Copy of International Preliminary Examination.
Gualtieri Gina M.
Isabella David
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