Patent US5702373A successfully refreshed from Google Patents.
US5702373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite super-elastic alloy braid reinforced catheter
Assignee: Target Therapeutics Inc
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Filing: 1995-08-31
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Granted: 1997-12-30
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Expires: 2015-08-31
Abstract
Abstract This is a surgical device. In particular, it is a composite catheter assembly suitable for accessing a tissue target within the body, typically a target which is accessible through the vascular system. Central to the invention is the presence in the catheter assembly of a catheter section having a braided metallic reinforcing member, typically of superelastic alloy ribbon, situated within the reinforced catheter section in such a way to create a catheter having an exceptionally thin wall, controlled stiffness, high resistance to kinking, and complete recovery in vivo from kinking situations. The braid may have a single pitch or may vary in pitch along the axis of the catheter or catheter section. The braided ribbon reinforcing member typically is placed between a flexible outer tubing member and an inner tubing member to produce a catheter section which is very flexible but highly kink resistant. At least a proximal portion or section of the catheter assembly is a section made of a stiff polymeric or metallic tubing member.
Inventors
- 👤 Gene Samson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:47
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/005; A61M25/0067; A61M25/008; A61M2025/0081; A61M25/0053; A61M25/0054
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
125 words
A catheter assembly comprising: an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, comprising a.) a relatively more flexible and more distal segment, comprising i.) a braid member woven of a plurality of ribbons, at least a majority of which ribbons comprise a superelastic alloy, and having inner and outer surfaces, ii.) at least one inner lining member interior to said braid member, and iii.) at least one outer covering member exterior to said braid member wherein the relatively more distal segment has a critical bend diameter of no more than 3.0 mm, and b.) a relatively more rigid and more proximal tubular segment comprising a comparatively high flexural modulus material.
Claim 2
Dependent Claim
125 words
A catheter assembly comprising: an elongate tubular member having a proximal end and a distal end and a passageway defining an inner lumen extending between those ends, comprising a.) a relatively more flexible and more distal segment, comprising i.) a braid member woven of a plurality of ribbons, at least a majority of which ribbons comprise a superelastic alloy, and having inner and outer surfaces, ii.) at least one inner lining member interior to said braid member, and iii.) at least one outer covering member exterior to said braid member wherein the relatively more distal segment has a critical bend diameter of no more than 3.0 mm, and b.) a relatively more rigid and more proximal tubular segment comprising a comparatively high flexural modulus material.
Claim 3
Dependent Claim
22 words
The catheter assembly of claim 1 wherein at least one of the inner lining member and the outer covering member are polymers.
Claim 4
Dependent Claim
37 words
The catheter assembly of claim 2 wherein the polymers are selected from members selected from the group consisting of polyimides, polyamides, polyesters, polyethylene, polypropylene, polyvinylchloride, polyfluorocarbons, polyurethanes, polysulfones, and their mixtures, alloys, blends, copolymers, and block copolymers.
Claim 5
Dependent Claim
12 words
The catheter assembly of claim 1 wherein the superelastic alloy is nitinol.
Claim 6
Dependent Claim
17 words
The catheter assembly of claim 1 wherein a minority of the braid member ribbons are stainless steel.
Claim 7
Dependent Claim
28 words
The catheter assembly of claim 1 wherein a minority of the braid member ribbons comprise a member selected from the group consisting of gold, platinum silver, and copper.
Claim 8
Dependent Claim
28 words
The catheter assembly of claim 1 where the braid member ribbons have a thickness between 0.5 mil and 3.5 mil and a width between 2.5 and 12.0 mil.
Claim 9
Dependent Claim
22 words
The catheter assembly of claim 1 wherein at least one of the inner liner member and the outer covering member is radiopaque.
Claim 10
Dependent Claim
13 words
The catheter assembly of claim 1 where the inner liner comprises a coil.
Claim 11
Dependent Claim
30 words
The catheter assembly of claim 1 where the inner liner comprises a ribbon coil of a material selected from the group consisting of superelastic alloys, stainless steels, and radiopaque alloys.
Claim 12
Dependent Claim
14 words
The catheter assembly of claim 10 where said ribbon coil comprising a nickel-titanium alloy.
Claim 13
Dependent Claim
14 words
The catheter assembly of claim 10 where said ribbon coil comprising a stainless steel.
Claim 14
Dependent Claim
14 words
The catheter assembly of claim 10 where said ribbon coil comprising a platinum-tungsten alloy.
Claim 15
Dependent Claim
14 words
The catheter assembly of claim 1 where the more proximal section comprises a polymer.
Claim 16
Dependent Claim
27 words
The catheter assembly of claim 14, where the more proximal section comprises a polymer selected from the group consisting of polyamides, polyamide-polyimides, polyimides, polycarbonates, LCP's, and acetals.
Claim 17
Dependent Claim
14 words
The catheter assembly of claim 15 where the more proximal section comprises a Nylon.
Claim 18
Dependent Claim
14 words
The catheter assembly of claim 15 where the more proximal section comprises a polyimide.
Claim 19
Dependent Claim
15 words
The catheter assembly of claim 1 where the more proximal section comprises a metallic tubing.
Claim 20
Dependent Claim
17 words
The catheter assembly of claim 18 where the more proximal section is electrically connected to the braid.
Claim 21
Dependent Claim
27 words
The catheter assembly of claim 1 further comprising a removable, slidable guidewire placed interior to and in slidable relationship to said more distal and more proximal segments.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-29 | 2001-06-30 | 2001-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-29 | 2005-06-30 | 2005-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-29 | 2009-06-30 | 2009-12-30 | $7700.00 | Window Closed / Lapsed |