US20020099405A1
Expired / Lapsed
US
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Apparatus for deploying body implantable stents
Assignee: Boston Scientific Scimed Inc
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Filing: 2002-03-19
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Granted: —
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Expires: 2022-03-19
Abstract
Abstract A stent deployment device includes a flexible, elongate interior catheter and a retaining structure cooperating with the catheter to support a stent along a distal end support region of the catheter. The stent is supported in a reduced radius delivery state to facilitate delivery to a treatment site in a body lumen, by advancing the device over a previously positioned guidewire. An opening at the distal end of the device receives the guidewire into a guidewire lumen of the interior catheter. A second opening through the catheter wall just proximally of the support region allows passage of the guidewire to the exterior of the catheter, whereby the guidewire is contained within the device only along the distal end region. The retaining means can include an exterior catheter surrounding the interior catheter and stent, and moveable axially relative to the interior catheter. A portion of the guidewire proximally of the second opening is contained between the catheters, and can be removed from the exterior catheter through a slit running axially along the exterior catheter. Alternatively, the retaining means can include a pair of spaced apart sleeves integral with the interior catheter and frictionally retaining opposite ends of the stent, to maintain the stent in the delivery state. In this case the catheter further supports a dilatation balloon surrounded by the stent. The balloon is expanded to free the stent from the sleeves.
Inventors
- 👤 Matthew Yurek
- 👤 Steven Healy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:06
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61F2/962; A61F2/966; A61F2002/9528; A61F2002/9583; A61F2002/9665
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
5 words
1 - 24 are cancelled.]
Claim 2
Dependent Claim
5 words
1 - 24 are cancelled.]
Claim 3
Dependent Claim
185 words
25 . In combination, a self-expanding stent and a device for deploying the stent in a body vessel, the combination comprising: (a) an inner member having a side wall and a distal-most portion, and a first opening through the side wall along the distal-most portion; (b) a self-expanding stent disposed in a radially contracted state about at least part of the inner member distal-most portion, distally of the first opening; (c) a stent retainer having a distal section positionable at a selected location to surround the inner member distal-most portion and the stent, and a proximal section integral with the distal section operable to move the distal section longitudinally relative to the inner member distal-most portion and the stent, distally toward and proximally away from the selected location, wherein the distal section has a distal-section lumen extending therethrough, and the distal section when at the selected location contains the distal-most portion and the stent within the distal-section lumen; and (d) a guidewire lumen disposed between the first opening through said side wall and a second opening in the inner member distal of the first opening.
Claim 4
Dependent Claim
185 words
25 . In combination, a self-expanding stent and a device for deploying the stent in a body vessel, the combination comprising: (a) an inner member having a side wall and a distal-most portion, and a first opening through the side wall along the distal-most portion; (b) a self-expanding stent disposed in a radially contracted state about at least part of the inner member distal-most portion, distally of the first opening; (c) a stent retainer having a distal section positionable at a selected location to surround the inner member distal-most portion and the stent, and a proximal section integral with the distal section operable to move the distal section longitudinally relative to the inner member distal-most portion and the stent, distally toward and proximally away from the selected location, wherein the distal section has a distal-section lumen extending therethrough, and the distal section when at the selected location contains the distal-most portion and the stent within the distal-section lumen; and (d) a guidewire lumen disposed between the first opening through said side wall and a second opening in the inner member distal of the first opening.
Claim 5
Dependent Claim
66 words
26 . The combination of claim 25 wherein: said proximal and distal sections of the stent retainer are tubular, and the proximal section incorporates a slit running longitudinally therealong to allow passage of a guidewire through the proximal section, a distal end of the slit being disposed near the first opening and spaced proximally of the stent when the distal section is at the selected location.
Claim 6
Dependent Claim
20 words
27 . The combination of claim 26 wherein: the slit runs along substantially the entire length of the proximal section.
Claim 7
Dependent Claim
24 words
28 . The combination of claim 25 wherein: the side wall, distally of the first opening, forms a continuous enclosure around the guidewire lumen.
Claim 8
Dependent Claim
21 words
29 . The stent of claim 28 wherein: said second opening is disposed at a distal tip of the inner member.
Claim 9
Dependent Claim
30 words
30 . The combination of claim 28 wherein: said distal section, when moved proximally relative to the inner member away from the selected location, releases the stent for radial self-expansion.
Claim 10
Dependent Claim
223 words
31 . In combination, a stent and a device for deploying the stent in a body vessel, the combination including: a stent carrier having a side wall, a distal end region, and a first opening through the side wall along the distal end region; a flexible stent disposed about at least part of the distal end region and located distally of the first opening; a stent retainer adapted to be disposed at least partially about the distal end region of the stent carrier and the stent, and when so disposed, exerting a stent-retaining force upon the flexible stent to maintain the stent in a radially contracted state; said stent retainer being movable longitudinally relative to the stent carrier and the stent to release the stent and thereby allow an expansion of the stent to a radially enlarged state; and a guidewire lumen disposed between the first opening through the side wall and a second opening in the stent carrier distal of the first opening, the guidewire lumen passing within at least part of the distal end region of the stent carrier and adapted to accommodate a guidewire, wherein the first opening at least at a distal end portion thereof is larger in diameter than the guidewire, and the side wall distally of the first opening forms a continuous enclosure around the guidewire lumen.
Claim 11
Dependent Claim
223 words
31 . In combination, a stent and a device for deploying the stent in a body vessel, the combination including: a stent carrier having a side wall, a distal end region, and a first opening through the side wall along the distal end region; a flexible stent disposed about at least part of the distal end region and located distally of the first opening; a stent retainer adapted to be disposed at least partially about the distal end region of the stent carrier and the stent, and when so disposed, exerting a stent-retaining force upon the flexible stent to maintain the stent in a radially contracted state; said stent retainer being movable longitudinally relative to the stent carrier and the stent to release the stent and thereby allow an expansion of the stent to a radially enlarged state; and a guidewire lumen disposed between the first opening through the side wall and a second opening in the stent carrier distal of the first opening, the guidewire lumen passing within at least part of the distal end region of the stent carrier and adapted to accommodate a guidewire, wherein the first opening at least at a distal end portion thereof is larger in diameter than the guidewire, and the side wall distally of the first opening forms a continuous enclosure around the guidewire lumen.
Claim 12
Dependent Claim
39 words
32 . The combination of claim 31 wherein: said retainer comprises a tubular catheter having a catheter lumen and, when so disposed, contains the distal end region of the stent carrier, and the flexible stent, within the catheter lumen.
Claim 13
Dependent Claim
31 words
33 . The combination of claim 32 wherein: said tubular catheter is movable proximally relative to the stent carrier and the flexible stent to release the flexible stent for radial self-expansion.
Claim 14
Dependent Claim
29 words
34 . The stent of claim 31 wherein: said stent carrier comprises an inner catheter having a distal tip, and the second opening is disposed at the distal tip.
Claim 15
Dependent Claim
56 words
35 . The combination of claim 31 wherein: the stent retainer comprises a retainer wall, and the retainer wall incorporates a slit disposed proximally of the stent when the stent retainer is so disposed about the distal end region of the stent carrier and the stent, to allow passage of a guidewire through the retainer wall.
Claim 16
Dependent Claim
37 words
36 . The combination of claim 31 wherein: the stent retainer comprises a rolling membrane adapted to be disposed about the distal end region of the stent carrier and the flexible stent to exert said stent-retaining force.
Claim 17
Dependent Claim
224 words
37 . An assembly including a self-expanding stent and a stent delivery device, including: a stent carrier having a side wall, a distal end region, and a first opening through the side wall along the distal end region; a radially self-expanding stent adapted to be disposed about the stent carrier along the distal end region, distally of the first opening; a stent retainer having a distal section selectively positionable axially at a selected location relative to the stent carrier in surrounding relation to the stent when the stent is disposed about the stent carrier along the distal end region, thereby to maintain the stent in a radially contracted state against an internal restoring force, said distal section being continuous in a circumferential direction and surrounding the stent substantially over the entire axial length thereof; said stent retainer further being movable proximally relative to the stent carrier and the stent, to release the stent from the distal section and thereby allow the stent to self-expand under the internal restoring force to a radially enlarged state; and a guidewire lumen disposed between the first opening through the side wall and a second opening in the stent carrier disposed distally of the first opening, the guidewire lumen passing within at least part of the distal end region of the stent carrier and adapted to accommodate a guidewire.
Claim 18
Dependent Claim
224 words
37 . An assembly including a self-expanding stent and a stent delivery device, including: a stent carrier having a side wall, a distal end region, and a first opening through the side wall along the distal end region; a radially self-expanding stent adapted to be disposed about the stent carrier along the distal end region, distally of the first opening; a stent retainer having a distal section selectively positionable axially at a selected location relative to the stent carrier in surrounding relation to the stent when the stent is disposed about the stent carrier along the distal end region, thereby to maintain the stent in a radially contracted state against an internal restoring force, said distal section being continuous in a circumferential direction and surrounding the stent substantially over the entire axial length thereof; said stent retainer further being movable proximally relative to the stent carrier and the stent, to release the stent from the distal section and thereby allow the stent to self-expand under the internal restoring force to a radially enlarged state; and a guidewire lumen disposed between the first opening through the side wall and a second opening in the stent carrier disposed distally of the first opening, the guidewire lumen passing within at least part of the distal end region of the stent carrier and adapted to accommodate a guidewire.
Claim 19
Dependent Claim
69 words
38 . The assembly of claim 37 wherein: the stent retainer comprises a catheter, said distal section comprises a distal section of the catheter, and the catheter further comprises a proximal section incorporating a longitudinally extended slit to allow passage of a guidewire through the catheter, said slit being disposed near the first opening and spaced proximally of the stent when the distal section is at the selected location.
Claim 20
Dependent Claim
22 words
39 . The assembly of claim 38 wherein: said slit runs substantially the entire length of the proximal section of the catheter.
Claim 21
Dependent Claim
29 words
40 . The assembly of claim 37 wherein: the stent carrier comprises an inner catheter having a distal tip, and the second opening is disposed at the distal tip.
Claim 22
Dependent Claim
25 words
41 . The assembly of claim 37 wherein: the side wall, between the first opening and the second opening, is continuous in the circumferential direction.
Claim 23
Dependent Claim
225 words
42 . A stent deployment device, including: an elongate and flexible stent carrier adapted to carry a radially self-expanding stent in a radially contracted state, extended along and surrounding at least part of a distal end region of the stent carrier; a guidewire lumen formed through the distal end region of the stent carrier to accommodate a guidewire, said guidewire lumen being open to an exterior of the stent carrier at first and second openings along the distal end region; wherein the first opening is proximally spaced apart from the second opening; and a stent retaining device having a distal confining section and being axially positionable relative to the stent carrier to locate the distal confining section at a selected location along the distal end region to surround a radially self-expanding stent along substantially the entire axial length thereof when the stent is so carried by the stent carrier, thereby to maintain the stent in the radially contracted state against an internal restoring force; wherein the stent confining device is movable axially relative to the stent carrier, and when a self-expanding stent is so carried by the stent carrier, is movable proximally relative to the stent and stent carrier away from the selected location to release the stent and thereby allow the stent to self-expand to a radially enlarged state under the internal restoring force.
Claim 24
Dependent Claim
225 words
42 . A stent deployment device, including: an elongate and flexible stent carrier adapted to carry a radially self-expanding stent in a radially contracted state, extended along and surrounding at least part of a distal end region of the stent carrier; a guidewire lumen formed through the distal end region of the stent carrier to accommodate a guidewire, said guidewire lumen being open to an exterior of the stent carrier at first and second openings along the distal end region; wherein the first opening is proximally spaced apart from the second opening; and a stent retaining device having a distal confining section and being axially positionable relative to the stent carrier to locate the distal confining section at a selected location along the distal end region to surround a radially self-expanding stent along substantially the entire axial length thereof when the stent is so carried by the stent carrier, thereby to maintain the stent in the radially contracted state against an internal restoring force; wherein the stent confining device is movable axially relative to the stent carrier, and when a self-expanding stent is so carried by the stent carrier, is movable proximally relative to the stent and stent carrier away from the selected location to release the stent and thereby allow the stent to self-expand to a radially enlarged state under the internal restoring force.
Claim 25
Dependent Claim
41 words
43 . The device of claim 42 wherein: the stent retaining device comprises a catheter having a catheter wall and a catheter lumen running substantially the entire length thereof, and the distal confining section comprises a distal section of the catheter.
Claim 26
Dependent Claim
65 words
44 . The device of claim 43 further including: a third opening through the catheter wall adapted to allow passage of the guidewire into and out of the catheter lumen, the third opening being disposed proximate the first opening and proximally of a radially self-expanding stent when the stent is so carried by the stent carrier and the distal section is at the selected location.
Claim 27
Dependent Claim
23 words
45 . The device of claim 44 wherein: said third opening comprises a slit extending proximally toward a proximal end of the catheter.
Claim 28
Dependent Claim
26 words
46 . The device of claim 42 wherein: the first opening, at least at a distal end thereof, is wider than a diameter of the guidewire.
Claim 29
Dependent Claim
24 words
47 . The device of claim 42 wherein: the carrier has a distal tip, and the second opening is disposed at the distal tip.
Claim 30
Dependent Claim
45 words
48 . The device of claim 42 further including: a radially self-expanding stent carried by the stent carrier, extended along and surrounding at least part of the distal end region, and surrounded by said distal confining section and thereby maintained in the radially contracted state.
Claim 31
Dependent Claim
37 words
49 . The device of claim 42 wherein: said stent retaining device comprises a catheter and a rolling membrane attached to a distal end portion of the catheter, and the distal confining section comprises the rolling membrane.
References Cited (Backward Citations)
No citation records indexed.
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