Patent US3530586A successfully refreshed from Google Patents.
EP0722700A2
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A coronary endoprosthesis and a method for its fabrication
Assignee: X Trode SRL
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Filing: 1995-03-17
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Granted: —
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Expires: 2015-03-17
Abstract
Abstract A stent for implantation in a coronary artery (1) is assembled from discrete modules (2) fashioned in a biocompatible material, each composed of two "C" shaped members joined at the ends by respective rectilinear and mutually parallel members (3a, 3b); the individual modules are linked together by a single helicoid element (4), likewise fashioned in a biocompatible material, which is coiled around the rectilinear members (3a, 3b) in such a way as to effect a closure of the modules, disposed one alongside another, in a direction parallel with their longitudinal axis (X). The modules (2) and the helicoid element (4) are plastically deformable both in the radial and in the axial dimension, so that the surgeon can vary the axial distribution of the modules internally of the blood vessel (1) and modify the ultimate configuration of the helicoid element (4).
Inventors
- 👤 Enzo Borghi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:23
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2230/00; A61F2230/0063; A61F2230/0091
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
180 words
A coronary endoprosthesis implantable in blood vessels (1), characterized in that it comprises: - a plurality of discrete modules (2) fashioned from a biocompatible material, each exhibiting two "C" shaped members joined one to another at their free ends by respective rectilinear and mutually parallel members (3a, 3b); - a single helicoid element (4), by way of which the modules (2) are associated one with another in succession, fashioned likewise from a biocompatible material and coiled around at least one of the rectilinear members (3a, 3b) so as to determine substantially a closure of the modules (2) along a direction parallel with a longitudinal axis (X), and in such a way as to establish an integrated prosthetic structure appearing tubular in section with the single modules (2) disposed one alongside another; and, in that the modules (2) and the helicoid element (4) are plastically deformable both in the radial and in the axial dimension, not least to allow of varying the axial distribution of the modules internally of the blood vessel (1) and obtaining different configurations of the helicoid element.
Claim 2
Dependent Claim
21 words
An endoprosthesis as in claim 1, wherein the single helicoid element (4) is coiled around both the rectilinear members (3a, 3b).
Claim 3
Dependent Claim
41 words
An endoprosthesis as in claim 1, wherein the single module (2) presents a helicoidal configuration in which the two "C" members are joined by rectilinear connecting members (3a, 3b) offset one from another in the direction of the longitudinal axis (X).
Claim 4
Dependent Claim
54 words
An endoprosthesis as in claim 1, wherein the single module (2) consists in a wire of selected metal and the two rectilinear members (3a, 3b) are disposed, at least in an undeformed configuration of the prosthetic structure, offset one from another and aligned on a single straight line parallel to the longitudinal axis (X).
Claim 5
Dependent Claim
24 words
An endoprosthesis as in claim 1, wherein at least the modules (2) or the helicoid element (4) will be fashioned from a radiopaque material.
Claim 6
Dependent Claim
16 words
An endoprosthesis as in claim 1, wherein the single module (2) is fashioned from stainless steel.
Claim 7
Dependent Claim
20 words
An endoprosthesis as in claim 1, wherein the single module (2) is fashioned from an alloy of platinum and iridium.
Claim 8
Dependent Claim
20 words
An endoprosthesis as in claim 1, wherein the single module (2) is fashioned from an alloy of titanium and nickel.
Claim 9
Dependent Claim
21 words
An endoprosthesis as in claim 1, wherein the helicoid element (4) consists in a spiral wound wire fashioned from stainless steel.
Claim 10
Dependent Claim
25 words
An endoprosthesis as in claim 1, wherein the helicoid element (4) consists in a spiral wound wire fashioned from an alloy of platinum and iridium.
Claim 11
Dependent Claim
25 words
An endoprosthesis as in claim 1, wherein the helicoid element (4) consists in a spiral wound wire fashioned from an alloy of titanium and nickel.
Claim 12
Dependent Claim
21 words
An endoprosthesis as in claim 1, wherein at least the modules (2) or the helicoid element (4) will be carbon coated.
Claim 13
Dependent Claim
92 words
An endoprosthesis as in claim 1, wherein the single module (2) consists in a filiform element (30) presenting a quadrangular "U" outline of which the terminal portions (30a, 30b) coincide with one of the parallel members (3a, 3b) and are secured by a link element (31), fashioned from a biocompatible and radiopaque material, in such a way that the free ends (30c, 30d) of the terminal portions (30a, 30b) project from the corresponding ends of the link element (31) as anchor points designed to penetrate the wall of the blood vessel (1).
Claim 14
Independent Claim
160 words
A method of fabricating an endoprosthesis as in claims 1 to 12, comprising the steps of: - a) dividing and cutting a tubular element (5) into a plurality of slender rings (6), each constituting a single module (2); - b) deforming each single ring (6) radially in such a way as to change the hitherto circular outline to a substantially quadrangular outline comprising pairs of rectilinear members (3a, 3b, 3c, 3d); - c) bending each single module (2) of quadrangular outline to a cylindrical shape through the agency of template means (17) in such a way as to obtain two mutually parallel and substantially circular members (3c, 3d) of "C" profile; - d) coiling the helicoid element (4) in alignment with a longitudinal axis around at least one of the rectilinear members (3a, 3b) afforded by each of the single modules (2) making up the prosthetic structure, in such a way as to obtain a tubular configuration of the structure.
Claim 15
Independent Claim
118 words
A method of fabricating an endoprosthesis as in claims 1 to 12, comprising the steps of: - a) cutting an element (15) from a flat leaf (16) of material so as to produce a quadrangular outline comprising pairs of rectilinear members (3a, 3b, 3c, 3d); - b) bending each single quadrangular element (15) from a flat profile to a substantially cylindrical profile through the agency of template means (17); - c) coiling the helicoid element (4) in alignment with a longitudinal axis around at least one of the rectilinear members (3a, 3b) afforded by each of the single modules (2) making up the prosthetic structure, in such a way as to obtain a tubular configuration of the structure.
Claim 16
Independent Claim
97 words
A method of fabricating an endoprosthesis as in claims 1 to 12, comprising the steps of: - a) cutting a thin gauge tubular element (18) so as to obtain an element (19) of quadrangular and substantially cylindrical geometry exhibiting two "C" members and constituting the single module (2); - b) coiling the helicoid element (4) in alignment with a longitudinal axis around at least one of the rectilinear members (3a, 3b) afforded by each of the single modules (2) making up the prosthetic structure, in such a way as to obtain a tubular configuration of the structure.
Claim 17
Dependent Claim
272 words
A method of fabricating an endoprosthesis as in claim 1, wherein each module (2) consists in a filiform element (30) of quadrangular outline exhibiting two terminal portions (30a, 30b) that coincide with one of the parallel members (3a, 3b) and are secured by a link element (31), fashioned from a biocompatible material, in such a way that the free ends (30c, 30d) of the terminal portions (30a, 30b) project from the corresponding ends of the link element (31) as anchor points designed to penetrate the wall of the blood vessel (1), comprising the steps of: - a) bending a filiform element (30) in such a way as to create a module (2) quadrangular in outline, of which the two terminal portions (30a, 30b) are disposed mutually parallel and adjacent, coinciding with one of the rectilinear members (3a, 3b) of the module (2); - b) securing the rectilinear member (3a, 3b) that coincides with the terminal portions (30a, 30b), by means of the link element (31), such that the free ends (30c, 30d) afforded by the extremities of the terminal portions (30a, 30b) project from opposite ends of the link element (31); - c) bending each single quadrangular filiform element (30) from a flat profile to a substantially cylindrical profile through the agency of template means (17); - d) coiling the helicoid element (4) in alignment with a longitudinal axis around at least one of the rectilinear members (3a, 3b) afforded by each of the single modules (2) formed from corresponding filiform elements (30) and making up the prosthetic structure, in such a way as to obtain a tubular configuration of the structure.
Claim 18
Dependent Claim
42 words
A method as in claim 14 or 15 or 16, wherein the helicoid element (4) is coiled around both of the rectilinear members (3a, 3b) in such a way that each module (2) exhibits an enclosed tubular configuration when seen in section.
Claim 19
Dependent Claim
76 words
A method as in claim 14 or 15 or 16 or 17, wherein the step of coiling the helicoid element (4) around at least one of the rectilinear members (3a, 3b) is preceded by a bending step during which the module (2) assumes a helicoidal configuration comprising two mutually parallel and essentially circular members (3c, 3d) of "C" profile interconnected by two rectilinear members (3a, 3b) disposed mutually offset and aligned on a common longitudinal axis.
Claim 20
Independent Claim
141 words
A method of implanting an endoprosthesis as in claims 1 to 12 internally of a blood vessel (1), comprising the steps of: - a) applying the endoprosthesis to a catheter (7) such as will allow its insertion transluminally in an enclosed configuration, with the rectilinear members (3a, 3b) of the modules (2) drawn together and longitudinally disposed; - b) introducing and positioning the catheter (7) into and internally of the blood vessel (1), in such a way as to locate the endoprosthesis at a predetermined site exhibiting an occlusion (8); - c) deforming the endoprosthesis plastically by means of the catheter (7) in such a manner that contact is established with the wall (9) of the blood vessel (1), thereby producing a different radial configuration of the modules (2) and a different axial configuration at least of the helicoid element (4).
References Cited (Backward Citations)
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