US20030074055A1
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US
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Method and system for fixation of endoluminal devices
Assignee: Lifeshield Sciences LLC
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Filing: 2001-10-17
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Granted: —
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Expires: 2021-10-17
Abstract
Abstract A system and method employs collar stents to implant an endoluminal device, such as a stent-graft, in a lumen. The system comprises at least one collar stent adapted to precondition a portion of the lumen for anchoring an endoluminal device having at least a portion adapted to be deployed radially within the collar stent. The method comprises first deploying one or more collar stents, and then deploying the endoluminal device radially within the one or more collar stents. In various embodiments, the collar stent may be radiopaque, may have inwardly protruding barbs for engaging the endoluminal device, and may have a region having a relatively low percentage of open area for bridging a portion of the main lumen having an intersecting lumen. The preconditioning step of implanting the collar stent may change the morphology of the lumen to more favorable morphology, such as from a non-circumferential geometry to a circumferential geometry.
Inventors
- 👤 Patrick Haverkost
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:10
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/848; A61F2/852; A61F2/86; A61F2/89; A61F2/90; A61F2002/061; A61F2002/065; A61F2002/075; A61F2002/8486; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2250/00; A61F2250/0058; A61F2250/006; A61F2250/0063
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
50 words
1 . A method for deploying an endoluminal device in a lumen, the method comprising the steps of: (a) first deploying one or more collar stents in one or more anchor locations in the lumen; and then (b) deploying the endoluminal device radially within the one or more collar stents.
Claim 2
Dependent Claim
50 words
1 . A method for deploying an endoluminal device in a lumen, the method comprising the steps of: (a) first deploying one or more collar stents in one or more anchor locations in the lumen; and then (b) deploying the endoluminal device radially within the one or more collar stents.
Claim 3
Dependent Claim
30 words
2 . The method of claim 1 further comprising allowing a period of time between steps (a) and (b) for intravascular tissue growth around the one or more collar stents.
Claim 4
Dependent Claim
19 words
3 . The method of claim 2 , wherein the period of time is at least about 2 weeks.
Claim 5
Dependent Claim
64 words
4 . The method of claim 1 , wherein the endoluminal device is a stent-graft having a distal end adapted to be deployed upstream relative to endoluminal fluid flow of one or more proximal ends of the stent-graft, wherein the method comprises implanting a first of the collar stents in a first of the anchor locations aligned with the distal end of the stent-graft.
Claim 6
Dependent Claim
41 words
5 . The method of claim 4 , wherein the stent-graft has a single proximal end and the method further comprises implanting a second of the collar stents in a second of the anchor locations aligned with the single proximal end.
Claim 7
Dependent Claim
75 words
6 . The method of claim 4 , wherein the stent-graft branches into at least two proximal portions, each portion having a proximal end, the method further comprising implanting a second of the collar stents in a second of the anchor locations aligned with a first proximal end of the stent-graft and implanting a third of the collar stents in a third of the anchor locations aligned with a second proximal end of the stent-graft.
Claim 8
Dependent Claim
85 words
7 . The method of claim 6 , wherein the lumen is an aorta having a main body, one or more renal arteries that branch off of the main body at a renal intersection, a neck downstream of the renal intersection, and two iliac arteries that branch from the main body, the method comprising deploying the first collar stent in the neck, deploying the second collar stent in one of the iliac arteries, and deploying the third collar stent in another of the iliac arteries.
Claim 9
Dependent Claim
99 words
8 . The method of claim 7 , wherein the first collar stent comprises a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having the third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region, the method comprising implanting the first collar stent so that the second region bridges the renal intersection.
Claim 10
Dependent Claim
19 words
9 . The method of claim 8 , wherein the second stent geometry comprises a set of bridging struts.
Claim 11
Dependent Claim
21 words
10 . The method of claim 8 , wherein the third stent geometry is essentially identical to the first stent geometry.
Claim 12
Dependent Claim
112 words
11 . The method of claim 1 , wherein a first of the collar stents comprises a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having a third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region, the method comprising implanting the first collar stent so that the second region bridges a portion of the lumen where one or more branch lumen intersect the lumen.
Claim 13
Dependent Claim
19 words
12 . The method of claim 11 , wherein the second stent geometry comprises a set of bridging struts.
Claim 14
Dependent Claim
21 words
13 . The method of claim 11 , wherein the third stent geometry is essentially identical to the first stent geometry.
Claim 15
Dependent Claim
42 words
14 . The method of claim 1 , wherein a first of the collar stents comprises a plurality of barbs that protrude radially inward from the stent, the method comprising implanting the endoluminal device so that the barbs engage the endoluminal device.
Claim 16
Dependent Claim
34 words
15 . The method of claim 1 , wherein the lumen at the anchor location is initially non-circumferential, the method comprising implanting the collar stent to conform the anchor location to a circumferential geometry.
Claim 17
Dependent Claim
32 words
16 . The method of claim 1 , wherein the lumen at the anchor location initially has an angular inflection, the method comprising implanting the collar stent to straighten the angular inflection.
Claim 18
Dependent Claim
49 words
17 . A method for implantation of a stent-graft in a lumen, the method comprising preconditioning a portion of the lumen by implanting a collar stent prior to implanting the stent-graft, and then implanting the stent-graft so that at least a portion of the stent-graft overlaps the collar stent.
Claim 19
Dependent Claim
49 words
17 . A method for implantation of a stent-graft in a lumen, the method comprising preconditioning a portion of the lumen by implanting a collar stent prior to implanting the stent-graft, and then implanting the stent-graft so that at least a portion of the stent-graft overlaps the collar stent.
Claim 20
Dependent Claim
34 words
18 . The method of claim 17 , wherein the lumen has a first morphology, and the preconditioning step changes the first morphology to a second morphology closer to circumferential than the first morphology.
Claim 21
Dependent Claim
34 words
19 . The method of claim 17 , wherein the collar stent has a greater radiopacity than the lumen such that implantation of the collar stent enhances viewability of the portion of the lumen.
Claim 22
Dependent Claim
53 words
20 . A system for implantation of an endoluminal device in a lumen, the system comprising: at least one collar stent adapted to precondition a portion of the lumen for anchoring the endoluminal device; and the endoluminal device having at least a portion adapted to be deployed radially within of the collar stent.
Claim 23
Dependent Claim
53 words
20 . A system for implantation of an endoluminal device in a lumen, the system comprising: at least one collar stent adapted to precondition a portion of the lumen for anchoring the endoluminal device; and the endoluminal device having at least a portion adapted to be deployed radially within of the collar stent.
Claim 24
Dependent Claim
15 words
21 . The system of claim 20 , wherein the endoluminal device comprises a stent-graft.
Claim 25
Dependent Claim
44 words
22 . The system of claim 21 , wherein the stent-graft has a distal end and a proximal end, and the kit comprises a first collar stent for alignment with the distal end and a second collar stent for alignment with the proximal end.
Claim 26
Dependent Claim
69 words
23 . The system of claim 21 , wherein the stent-graft has a distal end and branches into at least two proximal portions, each portion having a proximal end, the at least one collar stent comprises a first collar stent for alignment with the distal end, a second collar stent for alignment with a first proximal end, and a third collar stent for alignment with a second proximal end.
Claim 27
Dependent Claim
95 words
24 . The system of claim 23 , wherein the stent-graft is adapted for deployment in an aorta having a main body, one or more renal arteries that branch off of the main body at a renal intersection, a neck downstream of the renal intersection, and two iliac arteries that branch from the main body, the first collar stent adapted to be deployed in the neck, the second collar stent adapted to be deployed in one of the iliac arteries, and the third collar stent adapted to be deployed in another of the iliac arteries.
Claim 28
Dependent Claim
94 words
25 . The system of claim 24 , wherein the first collar stent comprises a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having the third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region, the second region having a length sufficient to bridge the renal intersection.
Claim 29
Dependent Claim
19 words
26 . The system of claim 25 , wherein the second stent geometry comprises a set of bridging struts.
Claim 30
Dependent Claim
21 words
27 . The system of claim 25 , wherein the third stent geometry is essentially identical to the first stent geometry.
Claim 31
Dependent Claim
81 words
28 . The system of claim 20 , wherein the collar stent comprises a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having the third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region.
Claim 32
Dependent Claim
18 words
29 . The system of claim 28 , wherein second stent geometry comprises a set of bridging struts.
Claim 33
Dependent Claim
21 words
30 . The system of claim 28 , wherein the third stent geometry is essentially identical to the first stent geometry.
Claim 34
Dependent Claim
29 words
31 . The system of claim 20 , wherein the collar stent comprises a plurality of barbs that protrude radially inward from the stent for engaging the endoluminal device.
Claim 35
Dependent Claim
14 words
32 . The system of claim 20 , wherein the collar stent is radiopaque.
Claim 36
Dependent Claim
32 words
33 . The system of claim 20 , wherein the collar stent has a radial strength sufficient to modify a morphology of the lumen into which it is adapted to be implanted.
Claim 37
Dependent Claim
35 words
34 . The collar stent of claim 33 , wherein the radial strength is sufficient to change a non-circumferential morphology to a circumferential morphology, change an angularly inflected morphology to a straight morphology, or both.
Claim 38
Dependent Claim
14 words
35 . The system of claim 20 , wherein the collar stent is uncoated.
Claim 39
Dependent Claim
22 words
36 . The system of claim 20 , wherein the collar stent is coated with a material that encourages intravascular tissue growth.
Claim 40
Dependent Claim
41 words
37 . A collar stent for preconditioning a lumen for implantation of an endoluminal device overtop of the collar stent, the collar stent comprising a plurality of barbs that protrude radially inward from the stent adapted to engage the endoluminal device.
Claim 41
Dependent Claim
41 words
37 . A collar stent for preconditioning a lumen for implantation of an endoluminal device overtop of the collar stent, the collar stent comprising a plurality of barbs that protrude radially inward from the stent adapted to engage the endoluminal device.
Claim 42
Dependent Claim
118 words
38 . A collar stent for preconditioning a first lumen for implantation of an endoluminal device radially within the collar stent, the collar stent comprising a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having the third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region, the second region having a length sufficient to bridge a portion of the first lumen where one or more intersecting lumen meet the first lumen.
Claim 43
Dependent Claim
118 words
38 . A collar stent for preconditioning a first lumen for implantation of an endoluminal device radially within the collar stent, the collar stent comprising a first region having a first stent geometry with a first percentage of open area, a second region having a second stent geometry with a second percentage of open area greater than the first percentage, and a third region having the third stent geometry with a third percentage of open area less than the second percentage, the second region located intermediate the first region and the third region, the second region having a length sufficient to bridge a portion of the first lumen where one or more intersecting lumen meet the first lumen.
Claim 44
Dependent Claim
46 words
39 . The collar stent of claim 38 , wherein the first lumen is an aorta and the intersecting lumen are renal arteries that intersect the aorta at a renal intersection, in which the collar stent intermediate region length is sufficient to bridge the renal intersection.
Claim 45
Dependent Claim
15 words
40 . The collar stent of claim 38 , wherein the collar stent is radiopaque.
Claim 46
Dependent Claim
33 words
41 . The collar stent of claim 38 , wherein the collar stent has a radial strength sufficient to modify a morphology of the lumen into which it is adapted to be implanted.
Claim 47
Dependent Claim
35 words
42 . The collar stent of claim 41 , wherein the radial strength is sufficient to change a non-circumferential morphology to a circumferential morphology, change an angularly inflected morphology to a straight morphology, or both.
Claim 48
Dependent Claim
26 words
43 . The collar stent of claim 38 further comprising a plurality of barbs that protrude radially inward from the stent for engaging the endoluminal device.
Claim 49
Dependent Claim
127 words
44 . A method for deploying an endoluminal device in a lumen having an anchor location with an inadequate amount of available fixation length in a wall of the lumen for implantation of the device, the method comprising the steps of: (a) deploying a stent in the anchor location with a first portion of the stent in contact with the lumen wall and a second portion of the stent positioned radially inward of the lumen wall, leaving a gap between the stent and the wall; (b) allowing passage of a sufficient period of time for intravascular tissue growth to fill-in the gap between the stent and the lumen wall to increase the available fixation length; and then (c) deploying the endoluminal device radially inward of the stent.
Claim 50
Dependent Claim
127 words
44 . A method for deploying an endoluminal device in a lumen having an anchor location with an inadequate amount of available fixation length in a wall of the lumen for implantation of the device, the method comprising the steps of: (a) deploying a stent in the anchor location with a first portion of the stent in contact with the lumen wall and a second portion of the stent positioned radially inward of the lumen wall, leaving a gap between the stent and the wall; (b) allowing passage of a sufficient period of time for intravascular tissue growth to fill-in the gap between the stent and the lumen wall to increase the available fixation length; and then (c) deploying the endoluminal device radially inward of the stent.
Claim 51
Dependent Claim
19 words
45 . The method of claim 44 , wherein the anchor location is in a neck of an aorta.
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