US20060184226A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delivery system for self-expanding stent, a method of using the delivery system, and a method of producing the delivery system
Assignee: Boston Scientific Scimed Inc
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Filing: 2005-02-16
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Granted: —
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Expires: 2025-02-16
Abstract
Abstract A medical appliance is provided that includes an outer sheath adapted to enclose a self-expanding stent in an inner space before deployment of the self-expanding stent and an inner sheath arranged between the outer sheath and the self-expanding stent before deployment of the self-expanding stent. The inner sheath includes longitudinal slits that extend from a distal end of the medical appliance to the proximal end. The longitudinal slits form a plurality of inner sleeve tails. The medical appliance also includes an actuator adapted to move the outer sheath with respect to the inner sheath during deployment of the self-expanding stent. The actuator is adapted to cause the outer sheath to move proximally. A method of deploying a self-expanding stent is provided. A method of loading a delivery mechanism is provided.
Inventors
- 👤 Michael Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/9517; A61F2/9522; A61F2/962; A61F2/966; A61F2002/9665; A61F2210/00; A61F2210/0004; A61F2250/00; A61F2250/0058; A61F2250/0067
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
85 words
1 . A medical appliance, comprising: an outer sheath adapted to enclose a self-expanding stent in an interior space before deployment of the self-expanding stent; an inner sheath enclosed within the outer sheath and adapted to be arranged about proximally adjacent to the self-expanding stent before deployment of the self-expanding stent; and a plurality of extensions coupled to a distal end of the inner sheath, the extensions adapted to be arranged between the outer sheath and the self-expanding stent before deployment of the self-expanding stent.
Claim 2
Dependent Claim
85 words
1 . A medical appliance, comprising: an outer sheath adapted to enclose a self-expanding stent in an interior space before deployment of the self-expanding stent; an inner sheath enclosed within the outer sheath and adapted to be arranged about proximally adjacent to the self-expanding stent before deployment of the self-expanding stent; and a plurality of extensions coupled to a distal end of the inner sheath, the extensions adapted to be arranged between the outer sheath and the self-expanding stent before deployment of the self-expanding stent.
Claim 3
Dependent Claim
47 words
2 . The medical appliance of claim 1 , wherein the extensions comprise longitudinal slits of the inner sheath forming a plurality of inner sleeve tails, the inner sleeve tails extending from a distal end of the outer sheath to a distal end of the inner sheath.
Claim 4
Dependent Claim
27 words
3 . The medical appliance of claim 2 , wherein at least the longitudinal slits of the inner sheath are biodegradable and detachable from the medical appliance.
Claim 5
Dependent Claim
36 words
4 . The medical appliance of claim 1 , wherein the extensions comprise a plurality of wires, the wires extending from a distal end of the outer sheath to a distal end of the inner sheath.
Claim 6
Dependent Claim
65 words
5 . The medical appliance of claim 4 , further comprising: a molded tip coupled to a catheter and arranged distal of the outer sheath and the self-expanding stent before deployment; wherein the catheter is adapted to position the medical appliance in a lumen; and wherein the molded tip includes a respective annular space for housing an end of each of the plurality of wires.
Claim 7
Dependent Claim
16 words
6 . The medical appliance of claim 4 , wherein the wires comprise stainless steel wires.
Claim 8
Dependent Claim
30 words
7 . The medical appliance of claim 4 , wherein each of the wires is attached at a distal end to another of the wires to form a wire loop.
Claim 9
Dependent Claim
22 words
8 . The medical appliance of claim 4 , wherein the wires are roll-flattened to reduce a radial displacement of the wires.
Claim 10
Dependent Claim
42 words
9 . The medical appliance of claim 1 , further comprising an actuator adapted to move the outer sheath with respect to the inner sheath during deployment of the self-expanding stent, the actuator adapted to cause the outer sheath to move proximally.
Claim 11
Dependent Claim
14 words
10 . The medical appliance of claim 1 , further comprising the self-expanding stent.
Claim 12
Dependent Claim
21 words
11 . The medical appliance of claim 10 , wherein a rate of expansion of the self-expanding stent includes a delay.
Claim 13
Dependent Claim
20 words
12 . The medical appliance of claim 10 , wherein the self-expanding stent comprises a coating including a bioactive agent.
Claim 14
Dependent Claim
33 words
13 . The medical appliance of claim 10 , wherein: the medical appliance is deployed in a lumen of a human body; and the coating of the self-expanding stent releases the bioactive agent.
Claim 15
Dependent Claim
35 words
14 . The medical appliance of claim 1 , wherein, during deployment, the outer sheath is moved proximally with respect to the inner sheath and the plurality of extensions allows the self-expanding stent to expand.
Claim 16
Dependent Claim
33 words
15 . The medical appliance of claim 14 , wherein the plurality of extensions is retracted after the outer sheath has moved proximally and the self-expanding stent has expanded to fill a lumen.
Claim 17
Dependent Claim
32 words
16 . The medical appliance of claim 14 , further comprising an expandable pusher adapted to abut the self-expanding stent in a contracted state and oppose a proximal shear force during deployment.
Claim 18
Dependent Claim
23 words
17 . The medical appliance of claim 16 , wherein the expandable pusher fits flush with an inside diameter of the inner sheath.
Claim 19
Dependent Claim
45 words
18 . The medical appliance of claim 16 , wherein the expandable pusher is adapted to: expand when the self-expanding stent has expanded; abut the self-expanding stent in an expanded state; and oppose a further proximal shear force during retraction of the plurality of extensions.
Claim 20
Dependent Claim
97 words
19 . A method of deploying a self-expanding stent, comprising: inserting an outer sheath into a lumen of a body, the outer sheath coupled to a catheter, the outer sheath enclosing an inner sheath and a plurality of extensions, the plurality of extensions coupled to a distal end of the inner sheath and enclosing the self-expanding stent; and activating an activator to move the outer sheath relative to the inner sheath and the plurality of extensions, the outer sheath moving proximally, the plurality of extensions allowing the self-expanding stent to expand to an edge of the lumen.
Claim 21
Dependent Claim
97 words
19 . A method of deploying a self-expanding stent, comprising: inserting an outer sheath into a lumen of a body, the outer sheath coupled to a catheter, the outer sheath enclosing an inner sheath and a plurality of extensions, the plurality of extensions coupled to a distal end of the inner sheath and enclosing the self-expanding stent; and activating an activator to move the outer sheath relative to the inner sheath and the plurality of extensions, the outer sheath moving proximally, the plurality of extensions allowing the self-expanding stent to expand to an edge of the lumen.
Claim 22
Dependent Claim
42 words
20 . The method of claim 19 , further comprising: activating the activator to move the inner sheath relative to a pusher abutting the self-expanding stent, the inner sheath and the plurality of extensions moving proximally with respect to the self-expanding stent.
Claim 23
Dependent Claim
13 words
21 . The method of claim 19 , further comprising: retracting the catheter.
Claim 24
Dependent Claim
86 words
22 . A method of loading a delivery mechanism, comprising: inserting an inner sheath into an outer sheath, the inner sheath comprising a tube having a plurality of longitudinal slits bounded at least distally by a circumferential ring, the outer sheath coupled to a catheter, the catheter including an activation mechanism adapted to move the outer sheath proximally with respect to an expandable pusher; and detaching each of the longitudinal slits from each other of the longitudinal slits at a distal end of the inner sheath.
Claim 25
Dependent Claim
86 words
22 . A method of loading a delivery mechanism, comprising: inserting an inner sheath into an outer sheath, the inner sheath comprising a tube having a plurality of longitudinal slits bounded at least distally by a circumferential ring, the outer sheath coupled to a catheter, the catheter including an activation mechanism adapted to move the outer sheath proximally with respect to an expandable pusher; and detaching each of the longitudinal slits from each other of the longitudinal slits at a distal end of the inner sheath.
Claim 26
Dependent Claim
36 words
23 . The method of claim 22 , wherein the detaching operation comprises severing the circumferential ring at each of the longitudinal slits to extend each longitudinal slit to a distal edge of the inner sheath.
Claim 27
Dependent Claim
38 words
24 . The method of claim 22 , wherein the detaching operation comprises severing a cylindrical end portion of at least the inner sleeve so that each longitudinal slit extends to a distal edge of the inner sheath.
Claim 28
Dependent Claim
31 words
25 . The method of claim 22 , wherein the expandable pusher is adapted to abut the inner sheath when the outer sheath moves proximally with respect to the expandable pusher.
Claim 29
Dependent Claim
49 words
26 . The method of claim 25 , wherein the activation mechanism comprises a dual action activator, a first activation adapted to move the outer sheath proximally with respect to the expandable pusher, a second activation adapted to move the inner sheath proximally with respect to the expandable pusher.
Claim 30
Dependent Claim
23 words
27 . The method of claim 22 , further comprising: contracting a self-expanding stent; and inserting the self-expanding stent into the inner sheath.
Claim 31
Dependent Claim
73 words
28 . The method of claim 27 , wherein: the contracting of the self-expanding stent and the inserting of the self-expanding stent into the inner sheath are performed before the inserting of the inner sheath in the outer sheath and the detaching of each of the longitudinal slits; and the inserting of the inner sheath into the outer sheath further comprises inserting the self-expanding stent and the inner sheath into the outer sheath.
Claim 32
Dependent Claim
48 words
29 . The method of claim 28 , wherein the contracting of the self-expanding stent and the inserting of the self-expanding stent into the inner sheath are performed after the inserting of the inner sheath in the outer sheath and the detaching of each of the longitudinal slits.
References Cited (Backward Citations)
US5433723A
Cited
US6350278B1
Cited
US20020032477A1
Cited
US6063112A
Cited
US5749921A
Cited
US6391051B2
Cited
US6042589A
Cited
US6514280B1
Cited
US20030236545A1
Cited
US6187016B1
Cited
US20010047150A1
Cited
US6702843B1
Cited
US6613077B2
Cited
US20030114910A1
Cited
US20030236565A1
Cited
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