US5653727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular stent
Assignee: Medtronic Inc
•
Filing: 1996-01-18
•
Granted: 1997-08-05
•
Expires: 2016-01-18
Abstract
Abstract A medical device for use in the interior of a body lumen including a catheter and a radially expandable stent mounted on the catheter. The radially expandable stent is in the form of a hollow cylinder defined by a sequence of spaced apart wire elements with each of the wire elements extending 360 degrees around the cylinder and the wire elements having extendible, sinusoidal zig-zags lying flat with respect to the cylinder. The zig-zags are shaped in a generally longitudinal direction along the cylinder at one point and then reverse their direction so that the zig-zags may open as the wire element is expanded. The adjacent wire elements are flexibly connected together in an end-to-end fashion by helical winding.
Inventors
- 👤 Dominik M. Wiktor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/90; A61F2/95; A61F2/958; B; B21; B21F; B21F45/00; B21F45/008; A61F2002/825; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00035; A61F2310/00077; A61F2310/00155
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
132 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter; (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of wire elements forming a hollow cylinder, the wire elements spaced apart along the cylinder, each of the wire elements extending 360 degrees around the cylinder, and each of the wire elements having a plurality of extendible portions provided by zig-zags in the wire elements, the zig-zags made from a low memory metal, the zig-zags lying flat with respect to the cylinder which permit the wire elements to be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for connecting adjacent wire elements together.
Claim 2
Dependent Claim
132 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter; (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of wire elements forming a hollow cylinder, the wire elements spaced apart along the cylinder, each of the wire elements extending 360 degrees around the cylinder, and each of the wire elements having a plurality of extendible portions provided by zig-zags in the wire elements, the zig-zags made from a low memory metal, the zig-zags lying flat with respect to the cylinder which permit the wire elements to be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for connecting adjacent wire elements together.
Claim 3
Dependent Claim
15 words
A medical device according to claim 1 wherein the zig-zags are generally sinusoidal in shape.
Claim 4
Dependent Claim
18 words
A medical device according to claim 1 wherein the second diameter is about three times the first diameter.
Claim 5
Dependent Claim
17 words
A medical device according to claim 1 wherein the wire elements are evenly spaced around the cylinder.
Claim 6
Dependent Claim
16 words
A medical device according to claim 1 wherein the zig-zags are evenly spaced around the cylinder.
Claim 7
Dependent Claim
24 words
A medical device according to claim 1 wherein the mean for connecting adjacent wire elements together includes means for providing flexibility to the stent.
Claim 8
Dependent Claim
25 words
A medical device according to claim 6 wherein the means for connecting adjacent wire elements together is an end-to-end helical winding of the wire elements.
Claim 9
Dependent Claim
18 words
A medical device according to claim 1 also comprising means on the catheter for radially expanding the stent.
Claim 10
Dependent Claim
21 words
A medical device according to claim 8 wherein the means on the catheter for radially expanding the stent is a balloon.
Claim 11
Dependent Claim
21 words
A medical device according to claim 9 wherein the stent has an end formed in a loop to prevent balloon puncture.
Claim 12
Dependent Claim
126 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming a hollow cylinder, the elements arranged sequentially along the cylinder, each of the elements extending around the cylinder, and each of the elements having zig-zags therein, the zig-zags made from a low memory metal, the zig-zags being generally sinusoidal in shape with the zig-zags taking a generally longitudinal direction along the cylinder and then reversing their direction and lying flat with respect to the cylinder such that the zig-zags open as the stent is expanded from a first diameter to a second, expanded diameter; and (2) means for connecting adjacent elements together.
Claim 13
Dependent Claim
126 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming a hollow cylinder, the elements arranged sequentially along the cylinder, each of the elements extending around the cylinder, and each of the elements having zig-zags therein, the zig-zags made from a low memory metal, the zig-zags being generally sinusoidal in shape with the zig-zags taking a generally longitudinal direction along the cylinder and then reversing their direction and lying flat with respect to the cylinder such that the zig-zags open as the stent is expanded from a first diameter to a second, expanded diameter; and (2) means for connecting adjacent elements together.
Claim 14
Dependent Claim
16 words
A medical device according to claim 11 wherein the elements extend 360 degrees around the cylinder.
Claim 15
Dependent Claim
13 words
A medical device according to claim 11 wherein the elements are wire elements.
Claim 16
Dependent Claim
18 words
A medical device according to claim 11 wherein the second diameter is about three times the first diameter.
Claim 17
Dependent Claim
16 words
A medical device according to claim 11 wherein the elements are evenly spaced along the cylinder.
Claim 18
Dependent Claim
16 words
A medical device according to claim 11 wherein the zig-zags are evenly spaced around the cylinder.
Claim 19
Dependent Claim
23 words
A medical device according to claim 11 wherein the means for connecting adjacent elements together includes means for providing flexibility to the stent.
Claim 20
Dependent Claim
23 words
A medical device according to claim 17 wherein the means for connecting adjacent elements together is an end-to-end helical winding of the elements.
Claim 21
Dependent Claim
18 words
A medical device according to claim 11 also comprising means on the catheter for radially expanding the stent.
Claim 22
Dependent Claim
21 words
A medical device according to claim 19 wherein the means on the catheter for radially expanding the stent is a balloon.
Claim 23
Dependent Claim
21 words
A medical device according to claim 20 wherein the stent has an end formed in a loop to prevent balloon puncture.
Claim 24
Dependent Claim
128 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming o hollow cylinder, the elements spaced apart along the length of the cylinder, each of the elements extending 360 degrees around the cylinder, and each of the elements having a plurality of extendible portions made from a low memory material lying flat with respect to the cylinder which permit the elements to deform and be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for connecting adjacent elements together including means for providing flexibility to the stent.
Claim 25
Dependent Claim
128 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming o hollow cylinder, the elements spaced apart along the length of the cylinder, each of the elements extending 360 degrees around the cylinder, and each of the elements having a plurality of extendible portions made from a low memory material lying flat with respect to the cylinder which permit the elements to deform and be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for connecting adjacent elements together including means for providing flexibility to the stent.
Claim 26
Dependent Claim
20 words
A medical device according to claim 22 wherein the plurality of extendible portions are provided by zig-zags in the element.
Claim 27
Dependent Claim
15 words
A medical device according to claim 23 wherein the zig-zags are generally sinusoidal in shape.
Claim 28
Dependent Claim
13 words
A medical device according to claim 23 wherein the elements are wire elements.
Claim 29
Dependent Claim
18 words
A medical device according to claim 22 wherein the second diameter is about three times the first diameter.
Claim 30
Dependent Claim
16 words
A medical device according to claim 22 wherein the elements are evenly spaced along the cylinder.
Claim 31
Dependent Claim
16 words
A medical device according to claim 22 wherein the zig-zags are evenly spaced around the cylinder.
Claim 32
Dependent Claim
23 words
A medical device according to claim 22 wherein the means for connecting adjacent elements together is an end-to-end helical winding of the elements.
Claim 33
Dependent Claim
18 words
A medical device according to claim 22 also comprising means on the catheter for radially expanding the stent.
Claim 34
Dependent Claim
21 words
A medical device according to claim 30 wherein the means on the catheter for radially expanding the stent is a balloon.
Claim 35
Dependent Claim
21 words
A medical device according to claim 31 wherein the stent has an end formed in a loop to prevent balloon puncture.
Claim 36
Dependent Claim
114 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming a hollow cylinder, the elements spaced apart along the length of the cylinder, each of the elements extending 360 degrees around the cylinder, and each of the elements having a plurality of extendible portions lying flat with respect to the cylinder which permit the elements to be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for flexible, helical connection of adjacent elements.
Claim 37
Dependent Claim
114 words
A medical device for use in the interior of a body lumen comprising: (a) a catheter: (b) a radially expandable stent mounted on the catheter, the stent comprising: (1) a plurality of elements forming a hollow cylinder, the elements spaced apart along the length of the cylinder, each of the elements extending 360 degrees around the cylinder, and each of the elements having a plurality of extendible portions lying flat with respect to the cylinder which permit the elements to be expanded from a first diameter covering 360 degrees of the cylinder to a second, expanded diameter covering 360 degrees of the expanded cylinder; and (2) means for flexible, helical connection of adjacent elements.
Claim 38
Dependent Claim
20 words
A medical device according to claim 33 wherein the plurality of extendible portions are provided by zig-zags in the element.
Claim 39
Dependent Claim
15 words
A medical device according to claim 34 wherein the zig-zags are generally sinusoidal in shape.
Claim 40
Dependent Claim
13 words
A medical device according to claim 33 wherein the elements are wire elements.
Claim 41
Dependent Claim
18 words
A medical device according to claim 33 wherein the second diameter is about three times the first diameter.
Claim 42
Dependent Claim
16 words
A medical device according to claim 33 wherein the elements are evenly spaced along the cylinder.
Claim 43
Dependent Claim
16 words
A medical device according to claim 34 wherein the zig-zags are evenly spaced around the cylinder.
Claim 44
Dependent Claim
18 words
A medical device according to claim 33 also comprising means on the catheter for radially expanding the stent.
Claim 45
Dependent Claim
21 words
A medical device according to claim 40 wherein the means on the catheter for radially expanding the stent is a balloon.
Claim 46
Dependent Claim
21 words
A medical device according to claim 41 wherein the stent has an end formed in a loop to prevent balloon puncture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-08-04 | 2001-02-03 | 2001-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-08-04 | 2005-02-03 | 2005-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-08-04 | 2009-02-03 | 2009-08-05 | $7700.00 | Window Closed / Lapsed |