US20050085841A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable sheath for delivering instruments and agents into a body lumen and methods for use
Assignee: Medtronic Inc
•
Filing: 2004-09-02
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Granted: —
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Expires: 2024-09-02
Abstract
Abstract Apparatus and methods are provided for delivering a guidewire, agents, and the like through an occlusion in a body vessel or other body lumen. The apparatus includes a flexible catheter or other elongate member including a proximal end, a distal end sized for insertion into a body lumen, and a first lumen extending from the proximal end to a distal region of the tubular member. An expandable sheath is provided on the distal region of the catheter that is expandable from a contracted condition to minimize a profile of the sheath to allow insertion along with the tubular member into a body lumen, to an enlarged condition wherein the sheath at least partially defines a lumen communicating with and extending distally from the first lumen of the tubular member.
Inventors
- 👤 Christian Eversull
- 👤 Nicholas Mourlas
- 👤 Stephen Leefiang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:06
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61B; A61B17/00; A61B17/34; A61B17/3417; A61B17/3421; A61B17/3431; A61M25/01; A61M25/06; A61M25/0662; A61B17/3439; A61B90/00; A61B90/40; A61F; A61F2/00; A61F2/01; A61F2/013; A61M25/0021; A61M25/0023; A61M2025/0024; A61M2025/0681; A61M2025/1043; A61M2025/1095
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
116 words
1 . An apparatus for delivering a guidewire through an occlusion in a body lumen, comprising: an elongate tubular member comprising a proximal end, a distal end sized for insertion into a body lumen, and a first lumen extending from the proximal end to a distal region of the tubular member; and an expandable sheath on the distal region of the tubular member, the sheath being expandable from a contracted condition to minimize a profile of the sheath to allow insertion along with the tubular member into a body lumen, to an enlarged condition wherein the sheath at least partially defines a lumen communicating with and extending distally from the first lumen of the tubular member.
Claim 2
Dependent Claim
116 words
1 . An apparatus for delivering a guidewire through an occlusion in a body lumen, comprising: an elongate tubular member comprising a proximal end, a distal end sized for insertion into a body lumen, and a first lumen extending from the proximal end to a distal region of the tubular member; and an expandable sheath on the distal region of the tubular member, the sheath being expandable from a contracted condition to minimize a profile of the sheath to allow insertion along with the tubular member into a body lumen, to an enlarged condition wherein the sheath at least partially defines a lumen communicating with and extending distally from the first lumen of the tubular member.
Claim 3
Dependent Claim
42 words
2 . The apparatus of claim 1 , wherein the first lumen of the tubular member terminates at an outlet port on the distal region proximal to the distal end of the tubular member, the outlet port communicating with the sheath lumen.
Claim 4
Dependent Claim
55 words
3 . The apparatus of claim 2 , wherein the tubular member comprises a second lumen on the distal region extending from an inlet port distal to the outlet port and an opening in the distal end of the tubular member, and wherein the sheath lumen extends from the outlet port to the distal port.
Claim 5
Dependent Claim
22 words
4 . The apparatus of claim 2 , wherein the side port is located on a side wall of the tubular member.
Claim 6
Dependent Claim
40 words
5 . The apparatus of claim 2 , wherein the tubular member tapers such that the distal region has a smaller cross-section distal to the outlet port than an intermediate region of the tubular member proximal to the distal region.
Claim 7
Dependent Claim
25 words
6 . The apparatus of claim 1 , wherein the expandable sheath comprises a tubular member attached to the distal region of the tubular member.
Claim 8
Dependent Claim
31 words
7 . The apparatus of claim 1 , wherein the expandable sheath comprises a sheet including side edge attached along the distal region to at least partially define the sheath lumen.
Claim 9
Dependent Claim
35 words
8 . The apparatus of claim 1 , wherein the expandable sheath comprises a proximal inlet communicating with the first lumen of the tubular member and a distal outlet located distal to the proximal inlet.
Claim 10
Dependent Claim
29 words
9 . The apparatus of claim 1 , wherein the tubular member comprises a second lumen extending from the proximal end to the distal end of the tubular member.
Claim 11
Dependent Claim
36 words
10 . The apparatus of claim 1 , further comprising a guidewire insertable through the first lumen of the tubular member and into the sheath lumen, thereby expanding the sheath to accommodate advancing the guidewire therethrough.
Claim 12
Dependent Claim
53 words
11 . The apparatus of claim 1 , further comprising a source of inflation media coupled to the proximal end of the tubular member and communicating with the first lumen of the tubular member for delivering inflation media through the first lumen into the sheath lumen to at least partially expand the sheath.
Claim 13
Dependent Claim
97 words
12 . An apparatus for delivery into a body lumen of a patient, comprising: a flexible catheter comprising a proximal end, and a distal end sized for insertion into a body lumen; an expandable sheath attached around an outer surface of the catheter, the sheath being expandable from a contracted condition to minimize a profile of the sheath, to an enlarged condition wherein at least a portion of the sheath moves away from the outer surface of the catheter to at least partially define an accessory lumen extending between the proximal and distal ends of the sheath.
Claim 14
Dependent Claim
97 words
12 . An apparatus for delivery into a body lumen of a patient, comprising: a flexible catheter comprising a proximal end, and a distal end sized for insertion into a body lumen; an expandable sheath attached around an outer surface of the catheter, the sheath being expandable from a contracted condition to minimize a profile of the sheath, to an enlarged condition wherein at least a portion of the sheath moves away from the outer surface of the catheter to at least partially define an accessory lumen extending between the proximal and distal ends of the sheath.
Claim 15
Dependent Claim
15 words
13 . The apparatus of claim 12 , wherein the sheath comprises a lubricious material.
Claim 16
Dependent Claim
15 words
14 . The apparatus of claim 12 , wherein the sheath comprises a flimsy material.
Claim 17
Dependent Claim
23 words
15 . The apparatus of claim 12 , wherein the sheath comprises a wall thickness not more than about 0.01 inch (0.25 mm).
Claim 18
Dependent Claim
38 words
16 . The apparatus of claim 12 , wherein the sheath is attached to the outer surface of the catheter by at least one of bonding, mechanical interference, heat shrinking the sheath material, and twisting the sheath material.
Claim 19
Dependent Claim
43 words
17 . The apparatus of claim 12 , wherein the proximal end of the sheath includes one or more tabs for separating the proximal end of the sheath at least partially from the outer surface of the catheter to open the sheath lumen.
Claim 20
Dependent Claim
107 words
18 . A method for delivering an instrument through an occlusion in a body lumen using a catheter comprising an expandable sheath extending along an outer surface of the catheter, comprising: introducing a distal end of the catheter into the body lumen proximal to the occlusion with the sheath in a contracted condition; advancing the distal end of the catheter through the occlusion until a distal end of the sheath is disposed distal to the occlusion; advancing an elongate member through the sheath until a distal end of the elongate member is disposed distal to the occlusion; and withdrawing the catheter and sheath from the body lumen.
Claim 21
Dependent Claim
107 words
18 . A method for delivering an instrument through an occlusion in a body lumen using a catheter comprising an expandable sheath extending along an outer surface of the catheter, comprising: introducing a distal end of the catheter into the body lumen proximal to the occlusion with the sheath in a contracted condition; advancing the distal end of the catheter through the occlusion until a distal end of the sheath is disposed distal to the occlusion; advancing an elongate member through the sheath until a distal end of the elongate member is disposed distal to the occlusion; and withdrawing the catheter and sheath from the body lumen.
Claim 22
Dependent Claim
35 words
19 . The method of claim 18 , wherein the elongate member comprises a guidewire, and wherein one or more instruments are advanced over the guidewire after the catheter is withdrawn to treat the occlusion.
Claim 23
Dependent Claim
29 words
20 . The method of claim 18 , wherein the distal end of the catheter comprises one or more elements for facilitating advancing the distal end through the occlusion.
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