US20020099435A1
Expired / Lapsed
US
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Stent delivery system and method of manufacturing same
Assignee: Boston Scientific Scimed Inc
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Filing: 2001-01-22
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Granted: —
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Expires: 2021-01-22
Abstract
Abstract Stent delivery system and method of manufacturing same. In one embodiment, the stent delivery system comprises an inner catheter. A handle is disposed at the proximal end of the inner catheter, and an enlarged tip is disposed at the distal end thereof. A stent engaging sleeve coaxially surrounds and is secured to a portion of the inner catheter proximally contiguous to the tip. The stent engaging sleeve is used to frictionally engage a stent mounted thereover in such a way as to prevent the stent, during deployment, from sliding proximally relative to the inner catheter. The system additionally comprises a self-expandable stent of the type comprising a knitted mesh of nitinol wire flexible in both the radial and longitudinal axes. The stent is mounted over the stent engaging sleeve in a longitudinally stretched state and is maintained, until deployment, in the stretched state by a stent restraining sleeve. The stent restraining sleeve, which coaxially surrounds the stent and is appropriately sized to maintain the stent in its stretched state, is a braided tube formed directly over the stent. The system also includes an outer catheter that surrounds much of the distal end of the inner catheter up to its tip, the outer catheter being adapted for axial movement relative to the inner catheter. The distal end of the outer catheter, which is mechanically coupled to the distal end of the stent for axial movement, is provided with an increased inner diameter to accommodate those components positioned between the inner and outer catheters. To facilitate the advancement of the outer catheter over the stent restraining sleeve during the assembly of the system, the outer catheter is fabricated with a longitudinal split extending proximally from its distal end. After the outer catheter has been positioned over the stent restraining sleeve, the split is sealed.
Inventors
- 👤 Jonathan Stinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:16
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/962; A61F2/966; A61F2/82; A61F2/86; A61F2/90; A61F2/92; A61F2/97; A61F2002/9665; A61F2220/00; A61F2220/0025; A61F2220/005; A61F2220/0058; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49908; Y10T29/49909; Y10T29/49913; Y10T29/49925; Y10T29/49927; Y10T29/49929; Y10T29/49947; Y10T29/49966
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
83 words
1 . A stent delivery system comprising: (a) an inner catheter; (b) an outer catheter, said outer catheter surrounding at least a portion of the length of said inner catheter and adapted for axial movement relative to said inner catheter; (c) a self-expandable stent disposed between said inner catheter and said outer catheter; and (d) a stent restraining member disposed between said outer catheter and said self-expandable stent, said stent restraining member being dimensioned to maintain said self-expandable stent in a compressed state.
Claim 2
Dependent Claim
83 words
1 . A stent delivery system comprising: (a) an inner catheter; (b) an outer catheter, said outer catheter surrounding at least a portion of the length of said inner catheter and adapted for axial movement relative to said inner catheter; (c) a self-expandable stent disposed between said inner catheter and said outer catheter; and (d) a stent restraining member disposed between said outer catheter and said self-expandable stent, said stent restraining member being dimensioned to maintain said self-expandable stent in a compressed state.
Claim 3
Dependent Claim
23 words
2 . The stent delivery system as claimed in claim 1 wherein said stent restraining member is a tube surrounding said self-expandable stent.
Claim 4
Dependent Claim
18 words
3 . The stent delivery system s claimed in claim 2 wherein said tube is a braided tube.
Claim 5
Dependent Claim
29 words
4 . The stent delivery system as claimed in claim 3 wherein said braided tube is made from a strong, flexible, filamentary material having a low coefficient of friction.
Claim 6
Dependent Claim
34 words
5 . The stent delivery system as claimed in claim 3 wherein said braided tube is made from a fine polyester filamentary material that is strong, flexible and has a low coefficient of friction.
Claim 7
Dependent Claim
33 words
6 . The stent delivery system as claimed in claim 3 wherein said braided tube is made from a fine metal wire that is strong, flexible and has a low coefficient of friction.
Claim 8
Dependent Claim
24 words
7 . The stent delivery system as claimed in claim 2 wherein said tube is mechanically coupled to said outer catheter for axial movement.
Claim 9
Dependent Claim
23 words
8 . The stent delivery system as claimed in claim 2 wherein said stent restraining member is a coil surrounding said self-expandable stent.
Claim 10
Dependent Claim
27 words
9 . The stent delivery system as claimed in claim 8 wherein said coil is made from a strong, flexible material having a low coefficient of friction.
Claim 11
Dependent Claim
27 words
10 . The stent delivery system as claimed in claim 9 wherein said strong, flexible material is selected from the group consisting of wire, thread and ribbon.
Claim 12
Dependent Claim
24 words
11 . The stent delivery system as claimed in claim 8 wherein said coil is mechanically coupled to said outer catheter for axial movement.
Claim 13
Dependent Claim
30 words
12 . The stent delivery system as claimed in claim 1 wherein said self-expandable stent is a knitted mesh of nitinol wire flexible in both the radial and longitudinal axes.
Claim 14
Dependent Claim
29 words
13 . The stent delivery system as claimed in claim 1 further comprising means for deterring said self-expandable stent from sliding proximally relative to said inner catheter during deployment.
Claim 15
Dependent Claim
58 words
14 . The stent delivery system as claimed in claim 13 wherein said deterring means comprises a stent engaging sleeve fixed to said inner catheter, said stent engaging sleeve being provided with projections on its outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expanding stent from sliding proximally relative thereto.
Claim 16
Dependent Claim
59 words
15 . The stent delivery system as claimed in claim 1 further comprising a stent engaging sleeve fixed to said inner catheter, said self-expandable stent surrounding said stent engaging sleeve, said stent engaging sleeve having an outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expandable stent from sliding proximally relative thereto.
Claim 17
Dependent Claim
57 words
16 . The stent delivery system as claimed in claim 15 wherein said self-expandable stent is knitted mesh of nitinol wire flexible in both the radial and longitudinal axes, wherein said stent restraining member is a braided tube surrounding said self-expandable stent and wherein said braided tube is mechanically coupled to said outer catheter for axial movement.
Claim 18
Dependent Claim
39 words
17 . The stent delivery system as claimed in claim 1 further comprising a sleeve holding member, said sleeve holding member being fixed to said inner catheter and being secured to the proximal end of said stent restraining member.
Claim 19
Dependent Claim
79 words
18 . A stent delivery system comprising: (a) an inner catheter; (b) an outer catheter, said outer catheter surrounding at least a portion of the length of said inner catheter and adapted for axial movement relative to said inner catheter; and (c) a self-expandable stent disposed between said inner catheter and said outer catheter, said self-expandable stent being flexible in both the radial and longitudinal axes, said self-expandable stent being held in a compressed state by said outer catheter.
Claim 20
Dependent Claim
79 words
18 . A stent delivery system comprising: (a) an inner catheter; (b) an outer catheter, said outer catheter surrounding at least a portion of the length of said inner catheter and adapted for axial movement relative to said inner catheter; and (c) a self-expandable stent disposed between said inner catheter and said outer catheter, said self-expandable stent being flexible in both the radial and longitudinal axes, said self-expandable stent being held in a compressed state by said outer catheter.
Claim 21
Dependent Claim
28 words
19 . The stent delivery system as claimed in claim 18 wherein said self-expandable stent is a knitted mesh of nitinol wire coaxially mounted on said inner catheter.
Claim 22
Dependent Claim
29 words
20 . The stent delivery system as claimed in claim 19 further comprising means for deterring said self-expandable stent from sliding proximally relative to said inner catheter during deployment.
Claim 23
Dependent Claim
58 words
21 . The stent delivery system as claimed in claim 20 wherein said deterring means comprises a stent engaging sleeve fixed to said inner catheter, said stent engaging sleeve being provided with projections on its outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expanding stent from sliding proximally relative thereto.
Claim 24
Dependent Claim
59 words
22 . The stent delivery system as claimed in claim 19 further comprising a stent engaging sleeve fixed to said inner catheter, said self-expandable stent surrounding said stent engaging sleeve, said stent engaging sleeve having an outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expandable stent from sliding proximally relative thereto.
Claim 25
Dependent Claim
89 words
23 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter; (c) while said self-expandable stent is in a compressed state, positioning a braided tube around said inner catheter and said self-expandable stent, said braided tube being dimensioned to maintain said self-expandable stent in said compressed state; and (d) positioning an outer catheter around said braided tube, said outer catheter being adapted for axial movement relative to said inner catheter.
Claim 26
Dependent Claim
89 words
23 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter; (c) while said self-expandable stent is in a compressed state, positioning a braided tube around said inner catheter and said self-expandable stent, said braided tube being dimensioned to maintain said self-expandable stent in said compressed state; and (d) positioning an outer catheter around said braided tube, said outer catheter being adapted for axial movement relative to said inner catheter.
Claim 27
Dependent Claim
28 words
24 . The method as claimed in claim 23 wherein said braided tube positioning step comprises forming a braided tube over said self-expandable stent and said inner catheter.
Claim 28
Dependent Claim
23 words
25 . The method as claimed in claim 24 further comprising mechanically coupling said outer catheter to said braided tube for axial movement.
Claim 29
Dependent Claim
44 words
26 . The method as claimed in claim 25 wherein said inner catheter and said self-expandable stent are coaxially disposed, wherein said self-expandable stent is flexible in both the longitudinal and radial axes and wherein said compressing step comprises stretching said self-expandable stent longitudinally.
Claim 30
Dependent Claim
31 words
27 . The method as claimed in claim 26 wherein said outer catheter is a solid tube, said outer catheter positioning step comprising sliding said outer catheter over said braided tube.
Claim 31
Dependent Claim
45 words
28 . The method as claimed in claim 26 wherein said outer catheter is provided with a longitudinal slit extending at least a part of the length thereof, said method further comprising, after said outer catheter positioning step, the step of sealing said longitudinal slit.
Claim 32
Dependent Claim
29 words
29 . The method as claimed in claim 23 wherein said braided tube positioning step comprises sliding a pre-formed braided tube over said inner catheter and said self-expandable stent.
Claim 33
Dependent Claim
23 words
30 . The method as claimed in claim 29 further comprising mechanically coupling said outer catheter to said braided tube for axial movement.
Claim 34
Dependent Claim
44 words
31 . The method as claimed in claim 30 wherein said inner catheter and said self-expandable stent are coaxially disposed, wherein said self-expandable stent is flexible in both the longitudinal and radial axes and wherein said compressing step comprises stretching said self-expandable stent longitudinally.
Claim 35
Dependent Claim
17 words
32 . The method as claimed in claim 31 wherein said outer catheter is a solid tube.
Claim 36
Dependent Claim
43 words
33 . The method as claimed in claim 32 further comprising, before said outer catheter positioning step, the steps of fixing a braid holding sleeve to said inner catheter and securing the proximal end of said braided tube to said braid holding sleeve.
Claim 37
Dependent Claim
64 words
34 . The method as claimed in claim 31 further comprising, before said compressing step, the step of fixing a stent engaging sleeve to said inner catheter, said self-expandable stent surrounding said stent engaging sleeve, said stent engaging sleeve having an outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expandable stent from sliding proximally relative thereto.
Claim 38
Dependent Claim
89 words
35 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter; (c) while said self-expandable stent is in a compressed state, wrapping a helical restraint around said inner catheter and said self-expandable stent, said helical restraint being dimensioned to maintain said self-expandable stent in said compressed state; and (d) positioning an outer catheter around said helical restraint, said outer catheter being adapted for axial movement relative to said inner catheter.
Claim 39
Dependent Claim
89 words
35 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter; (c) while said self-expandable stent is in a compressed state, wrapping a helical restraint around said inner catheter and said self-expandable stent, said helical restraint being dimensioned to maintain said self-expandable stent in said compressed state; and (d) positioning an outer catheter around said helical restraint, said outer catheter being adapted for axial movement relative to said inner catheter.
Claim 40
Dependent Claim
30 words
36 . The method as claimed in claim 35 wherein said helical restraint is a made from a strong, flexible filamentary or ribbon-like material having a low coefficient of friction.
Claim 41
Dependent Claim
26 words
37 . The method as claimed in claim 36 further comprising the step of mechanically coupling said outer catheter to said helical restraint for axial movement.
Claim 42
Dependent Claim
44 words
38 . The method as claimed in claim 37 wherein said inner catheter and said self-expandable stent are coaxially disposed, wherein said self-expandable stent is flexible in both the longitudinal and radial axes and wherein said compressing step comprises stretching said self-expandable stent longitudinally.
Claim 43
Dependent Claim
45 words
39 . The method as claimed in claim 38 wherein said outer catheter is provided with a longitudinal slit extending at least a part of the length thereof, said method further comprising, after said outer catheter positioning step, the step of sealing said longitudinal slit.
Claim 44
Dependent Claim
64 words
40 . The method as claimed in claim 39 further comprising, before said compressing step, the step of fixing a stent engaging sleeve to said inner catheter, said self-expandable stent surrounding said stent engaging sleeve, said stent engaging sleeve having an outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expandable stent from sliding proximally relative thereto.
Claim 45
Dependent Claim
77 words
41 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter, said self-expandable stent being flexible in both the radial and longitudinal axes; and (c) positioning an outer catheter around said self-expandable stent, said outer catheter being adapted for axial movement relative to said inner catheter and being dimensioned to maintain said self-expandable stent in a compressed state.
Claim 46
Dependent Claim
77 words
41 . A method of manufacturing a stent delivery system, said method comprising the steps of: (a) providing an inner catheter; (b) compressing a self-expandable stent over said inner catheter, said self-expandable stent being flexible in both the radial and longitudinal axes; and (c) positioning an outer catheter around said self-expandable stent, said outer catheter being adapted for axial movement relative to said inner catheter and being dimensioned to maintain said self-expandable stent in a compressed state.
Claim 47
Dependent Claim
20 words
42 . The method as claimed in claim 41 wherein said self-expandable stent is a knitted mesh of nitinol wire.
Claim 48
Dependent Claim
45 words
43 . The method as claimed in claim 41 wherein said outer catheter is provided with a longitudinal slit extending at least a part of the length thereof, said method further comprising, after said outer catheter positioning step, the step of sealing said longitudinal slit.
Claim 49
Dependent Claim
64 words
44 . The method as claimed in claim 43 further comprising, before said compressing step, the step of fixing a stent engaging sleeve to said inner catheter, said self-expandable stent surrounding said stent engaging sleeve, said stent engaging sleeve having an outer surface adapted to engage said self-expandable stent in such a way as to deter said self-expandable stent from sliding proximally relative thereto.
References Cited (Backward Citations)
No citation records indexed.
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