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US6254588B1
Expired / Lapsed
US
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Microcatheter
Assignee: Micro Therapeutics Inc
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Filing: 1998-05-12
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Granted: 2001-07-03
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Expires: 2018-05-12
Abstract
Abstract Disclosed is an elongate flexible microcatheter, for diagnostic and or therapeutic applications. The microcatheter is provided with a small outside diameter and high degree of flexibility, to facilitate negotiation of small, tortuous vessels such as those encountered in intercranial catheterizations. The catheter is formed from a composite of a series of tubular elements, each extending axially for a different distance along the tubular body. A distal section on one or more of the tubular components is provided with a spiral cut, to modify the flexibility properties of the finished catheter. The catheter may also be provided with an inflatable balloon, and a valve to permit the use of a single lumen for both receiving a guidewire and for conveying inflation media.
Inventors
- 👤 Michael L. Jones
- 👤 Scott Evans
- 👤 George B. Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:17
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0012; A61M25/0043; A61M25/0054; A61M25/0067; A61M25/0074; A61M25/0075; A61M25/0021; A61M2025/0042; A61M25/0013; A61M25/005; A61M25/0051; A61M25/0053; A61M25/0068; A61M25/007
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
85 words
A catheter, comprising: an elongate flexible tubular body having proximal and distal ends, and at least one central lumen extending axially therethrough; and a spiral cut tubular member within the tubular body, the spiral cut tubular member having at least one flexibility gradient zone, said flexibility gradient zone having a first flexibility at a proximal end thereof, a second flexibility at a distal end thereof, and a continuous change in flexibility along the length of the zone from the first flexibility to the second flexibility.
Claim 2
Dependent Claim
85 words
A catheter, comprising: an elongate flexible tubular body having proximal and distal ends, and at least one central lumen extending axially therethrough; and a spiral cut tubular member within the tubular body, the spiral cut tubular member having at least one flexibility gradient zone, said flexibility gradient zone having a first flexibility at a proximal end thereof, a second flexibility at a distal end thereof, and a continuous change in flexibility along the length of the zone from the first flexibility to the second flexibility.
Claim 3
Dependent Claim
23 words
A catheter as in claim 1 , wherein said flexibility zone extends for at least about 98% of the length of the catheter.
Claim 4
Dependent Claim
23 words
A catheter as in claim 1 , wherein said flexibility zone extends for at least about 75% of the length of the catheter.
Claim 5
Dependent Claim
54 words
A catheter as in claim 1 , wherein said tubular body has a wall thickness between an outside surface of the tubular body and the lumen extending therethrough, and the wall thickness at the proximal end of the flexibility zone is greater than the wall thickness at the distal end of the flexibility zone.
Claim 6
Dependent Claim
27 words
A catheter as in claim 1 , wherein said flexibility zone comprises a continuous change in wall thickness from the proximal end to the distal end thereof.
Claim 7
Dependent Claim
58 words
A catheter as in claim 1 , wherein said flexibility zone extends for at least about 148 cm, and has a wall thickness within the range of from about 0.009 inches to about 0.012 inches at the proximal end thereof and within the range of from about 0.0005 inches to about 0.002 inches at the distal end thereof.
Claim 8
Dependent Claim
41 words
A catheter as in claim 1 , wherein said flexibility zone extends for at least about 148 cm, and has a wall thickness of about 0.012 inches at the proximal end thereof and about 0.001 inches at the distal end thereof.
Claim 9
Dependent Claim
78 words
A catheter, comprising: an elongate flexible tubular body having proximal and distal ends, and at least one central lumen extending axially therethrough; and a spiral cut tubular member within the tubular body, wherein the spiral cut tubular member has a first flexibility at a proximal end thereof, a second flexibility at a distal end thereof, and a continuous change in flexibility along the length of the spiral cut tubular member from the first flexibility to the second flexibility.
Claim 10
Dependent Claim
78 words
A catheter, comprising: an elongate flexible tubular body having proximal and distal ends, and at least one central lumen extending axially therethrough; and a spiral cut tubular member within the tubular body, wherein the spiral cut tubular member has a first flexibility at a proximal end thereof, a second flexibility at a distal end thereof, and a continuous change in flexibility along the length of the spiral cut tubular member from the first flexibility to the second flexibility.
Claim 11
Dependent Claim
25 words
A catheter as in claim 8 , wherein said spiral cut tubular member extends for at least about 75% of the length of the catheter.
Claim 12
Dependent Claim
60 words
A catheter as in claim 8 , wherein said spiral cut tubular member has a wall thickness between an outside surface of the tubular member and a lumen extending therethrough, and the wall thickness at the proximal end of the spiral cut tubular member is greater than the wall thickness at the distal end of the spiral cut tubular member.
Claim 13
Dependent Claim
29 words
A catheter as in claim 8 , wherein said spiral cut tubular member comprises a continuous change in wall thickness from the proximal end to the distal end thereof.
Claim 14
Dependent Claim
30 words
A catheter as in claim 11 , wherein said spiral cut tubular member has a lumen with a constant diameter between the proximal and distal ends of the tubular member.
Claim 15
Dependent Claim
43 words
A catheter as in claim 8 , wherein said spiral cut tubular member extends for at least about 148 cm, and has a wall thickness of about 0.012 inches at the proximal end thereof and about 0.001 inches at the distal end thereof.
References Cited (Backward Citations)
EP0029185A1
Cited
US4495134A
Cited
US4516972A
Cited
US4669172A
Cited
US4739768A
Cited
US4739768B1
Cited
US4739768B2
Cited
US4941877A
Cited
US4960410A
Cited
US4955862A
Cited
US5085635A
Cited
US5178158A
Cited
US5380304A
Cited
US5573520A
Cited
US5405304A
Cited
US5437288A
Cited
US5358493A
Cited
EP0631791A1
Cited
EP0643979A1
Cited
US5851203A
Cited
WO1995013110A1
Cited
US5676659A
Cited
US5545132A
Cited
US5454795A
Cited
EP0718003A1
Cited
US5843050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-07-02 | 2005-01-01 | 2005-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-07-02 | 2009-01-01 | 2009-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-07-02 | 2013-01-01 | 2013-07-03 | $7700.00 | Window Closed / Lapsed |