EP0788802A2
Expired / Lapsed
EP
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Titanium alloy self-expanding stent
Assignee: Schneider USA Inc
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Filing: 1997-01-31
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Granted: —
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Expires: 2017-01-31
Abstract
Abstract A self-expanding stent (10) formed from helically wound and braided filaments (12) of titanium or titanium alloys such as Ti-13Zr-13Nb.
Inventors
- 👤 Claude O. Clerc
- 👤 David W. Mayer
- 👤 Jonathan S. Stinson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 09:26
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/02; A61L31/022; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/95; A61F2/962; A61F2/966; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
43 words
An implantable medical device (10) comprised of a tubular, radially compressible, axially flexible and radially self-expandable structure including at least one elongate filament (12), wherein the filament (12) consists of titanium or titanium alloy and includes at least about 68 weight percent titanium.
Claim 2
Dependent Claim
47 words
The medical device (10) of claim 1 wherein the filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium and at least one element selected from the group consisting of aluminum, tin, zirconium, molybdenum, chromium, niobium and vanadium.
Claim 3
Dependent Claim
36 words
The medical device (10) of claim 2 wherein the filament consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-31 weight percent niobium and 1-31 weight percent zirconium.
Claim 4
Dependent Claim
21 words
The medical device (10) of claim 3 wherein the titanium alloy includes 10-15 weight percent niobium and 10-15 weight percent zirconium.
Claim 5
Dependent Claim
23 words
The medical device (10) of claim 4 wherein the titanium alloy includes about 13 weight percent niobium and about 13 weight percent zirconium.
Claim 6
Dependent Claim
45 words
The medical device (10) of claim 2 wherein the filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-29 weight percent aluminum, 0.5-29 weight percent tin, 1-29 weight percent zirconium and 1-29 weight percent molybdenum.
Claim 7
Dependent Claim
33 words
The medical device (10) of claim 6 wherein the titanium alloy includes about 6 weight percent aluminum, about 2 weight percent tin, about 4 weight percent zirconium and about 4 weight percent molybdenum.
Claim 8
Dependent Claim
49 words
The medical device (10) of claim 2 wherein the filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-28 weight percent aluminum, 1-28 weight percent vanadium, 1-28 weight percent chromium, 1-28 weight percent molybdenum and 1-28 weight percent zirconium.
Claim 9
Dependent Claim
38 words
The medical device (10) of claim 8 wherein the titanium alloy includes about 3 weight percent aluminum, about 8 weight percent vanadium, about 6 weight percent chromium, about 4 weight percent molybdenum and about 4 weight percent zirconium.
Claim 10
Dependent Claim
37 words
The medical device (10) of claim 2 wherein the filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-31 weight percent aluminum and 1-31 weight percent vanadium.
Claim 11
Dependent Claim
23 words
The medical device (10) of claim 10 wherein the titanium alloy includes about 6 weight percent aluminum and about 4 weight percent vanadium.
Claim 12
Dependent Claim
15 words
The medical device (10) of claim 1 wherein the filament is substantially free of nickel.
Claim 13
Dependent Claim
42 words
The medical device (10) of claim 1 wherein the midrange radial pressure, P, exerted by the device, in mm Hg, as a function of diameter, D, in mm, is within the range of about P = -2D + 40 ± 20 .
Claim 14
Dependent Claim
26 words
The medical device (110) of claim 1 wherein the device has at least one end (116) of diminishing diameter so as to function as a filter.
Claim 15
Dependent Claim
20 words
The medical device (10) of claim 1 wherein the structure includes multiple elongate filaments (12) interwoven to form a tube.
Claim 16
Dependent Claim
34 words
The medical device (10) of claim 15 wherein the structure includes a plurality of the elongate titanium or titanium alloy filaments (12) helically wound and interwoven in a braided configuration to form a tube.
Claim 17
Dependent Claim
35 words
The medical device (10) of claim 16 wherein the structure substantially consists of the plurality of elongate titanium or titanium alloy filaments (12) helically wound and interwoven in a braided configuration to form a tube.
Claim 18
Dependent Claim
47 words
The medical device (10) of claim 17 wherein each filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium and at least one element selected from the group consisting of aluminum, tin, zirconium, molybdenum, chromium, niobium and vanadium.
Claim 19
Dependent Claim
37 words
The medical device (10) of claim 18 wherein each filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-31 weight percent niobium and 1-31 weight percent zirconium.
Claim 20
Dependent Claim
21 words
The medical device (10) of claim 19 wherein the titanium alloy includes 10-15 weight percent niobium and 10-15 weight percent zirconium.
Claim 21
Dependent Claim
23 words
The medical device (10) of claim 20 wherein the titanium alloy includes about 13 weight percent niobium and about 13 weight percent zirconium.
Claim 22
Dependent Claim
45 words
The medical device (10) of claim 18 wherein each filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-29 weight percent aluminum, 0.5-29 weight percent tin, 1-29 weight percent zirconium and 1-29 weight percent molybdenum.
Claim 23
Dependent Claim
33 words
The medical device (10) of claim 22 wherein the titanium alloy includes about 6 weight percent aluminum, about 2 weight percent tin, about 4 weight percent zirconium and about 4 weight percent molybdenum.
Claim 24
Dependent Claim
49 words
The medical device (10) of claim 17 wherein each filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-28 weight percent aluminum, 1-28 weight percent vanadium, 1-28 weight percent chromium, 1-28 weight percent molybdenum and 1-28 weight percent zirconium.
Claim 25
Dependent Claim
38 words
The medical device (10) of claim 23 wherein the titanium alloy includes about 3 weight percent aluminum, about 8 weight percent vanadium, about 6 weight percent chromium, about 4 weight percent molybdenum and about 4 weight percent zirconium.
Claim 26
Dependent Claim
37 words
The medical device (10) of claim 17 wherein each filament (12) consists of titanium alloy and the titanium alloy consists of at least about 68 weight percent titanium, 1-31 weight percent aluminum and 1-31 weight percent vanadium.
Claim 27
Dependent Claim
23 words
The medical device (10) of claim 25 wherein the titanium alloy includes about 6 weight percent aluminum and about 4 weight percent vanadium.
Claim 28
Dependent Claim
42 words
The medical device (10) of claim 17 wherein the midrange radial pressure, P, exerted by the device, in mm Hg, as a function of diameter, D, in mm, is within the range of about P = -2D + 40 ± 20 .
Claim 29
Dependent Claim
26 words
The medical device (110) of claim 17 wherein the device has at least one end (116) of diminishing diameter so as to function as a filter.
Claim 30
Dependent Claim
48 words
An implantable medical device (10) comprised of a tubular, axially flexible and radially self-expandable structure including at least one elongate titanium or titanium alloy filament (12) which is substantially homogeneous in cross section and length, and wherein the titanium alloy includes at least about 68 weight percent titanium.
Claim 31
Independent Claim
178 words
A method for treating a site within a vessel of a patient, including: providing a biocompatible medical device (10) comprised of a tubular and axially flexible braid-like structure which is radially self-expandable between a compressed state and an expanded state and which includes at least one elongate filament (12) wherein the filament (12) consists of titanium or titanium alloy and includes at least about 68 weight percent titanium; providing a delivery system (20) with the medical device (10) positioned on a portion of the delivery system (20) in the compressed state; inserting the portion of the delivery system (20) with the medical device (10) into the patient's vessel at a location spaced from the treatment site, and manipulating the delivery system to advance the medical device (10) through the vessel, to the treatment site; detaching the delivery system (20) from the medical device (10) and allowing the medical device (10) to self-expand within the vessel; and removing the delivery system (20) from the patient with the medical device (10) remaining in the expanded state and supporting the vessel.
References Cited (Backward Citations)
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