US5279596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular catheter with kink resistant tip
Assignee: Cordis Corp
•
Filing: 1992-06-25
•
Granted: 1994-01-18
•
Expires: 2012-06-25
Abstract
Abstract An intravascular catheter comprises a proximal portion and a distal portion. The proximal portion has greater torsional stiffness than the distal portion, while the distal portion has greater dependability than the proximal portion. In accordance with this invention the distal portion carries a helical wire support member embedded therein, the helical support member being essentially free of crossing wires, to provide kink-resistance upon bending to the distal portion.
Inventors
- 👤 Javier E. Castaneda
- 👤 Robert F. Graham
- 👤 Peter Soltesz
- 👤 Thomas Trotta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:18
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/005; A61M25/0053; A61M25/0054; A61M25/0067; A61M25/0068; A61M25/0069; A61M25/008
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
108 words
An intravascular catheter which comprises a proximal portion and a distal portion, said proximal portion having greater torsional stiffness than said distal portion, said distal portion having greater bendability than said proximal portion, the improvement comprising, in combination: said distal portion defining a smooth-walled lumen and carrying a helical wire support member embedded therein, said helical support member being essentially free of cross wires, to provide kink-resistance upon bending to said distal portion, said proximal portion carrying a braided wire tubular support member embedded therein, said catheter defining an inner, lumen-defining tubular plastic layer positioned radially within said helical support member and a braided wire tubular support member.
Claim 2
Dependent Claim
108 words
An intravascular catheter which comprises a proximal portion and a distal portion, said proximal portion having greater torsional stiffness than said distal portion, said distal portion having greater bendability than said proximal portion, the improvement comprising, in combination: said distal portion defining a smooth-walled lumen and carrying a helical wire support member embedded therein, said helical support member being essentially free of cross wires, to provide kink-resistance upon bending to said distal portion, said proximal portion carrying a braided wire tubular support member embedded therein, said catheter defining an inner, lumen-defining tubular plastic layer positioned radially within said helical support member and a braided wire tubular support member.
Claim 3
Dependent Claim
22 words
The catheter of claim 1 in which said distal catheter portion is less than one-tenth the length of said proximal catheter portion.
Claim 4
Dependent Claim
21 words
The catheter of claim 1 in which said distal catheter portion carries a distal tip that is free of supporting strands.
Claim 5
Dependent Claim
20 words
The catheter of claim 1 in which said helical support member defines embedded coils that are spaced from each other.
Claim 6
Dependent Claim
15 words
The catheter of claim 1 in which said distal catheter portion defines a preformed bend.
Claim 7
Dependent Claim
42 words
The catheter of claim 1 in which said distal catheter portion comprises a plastic material that is softer than the plastic material of the proximal catheter portion, said distal catheter portion plastic material having a Shore "D" durometer of 25 to 50.
Claim 8
Dependent Claim
32 words
The catheter of claim 1 in which the wire of said helical support member defines a rectangular cross section, with the width of said wire being greater than the radial depth thereof.
Claim 9
Dependent Claim
96 words
An intravascular catheter which comprises a proximal portion and a distal portion, said proximal portion having greater torsional stiffness than said distal portion and carrying a braided wire tubular support member embedded therein, said distal portion having greater bendability than said proximal portion, the improvement comprising, in combination: said distal portion carrying a helical wire support member completely embedded therein, said helical support member being essentially free of crossing wires, to provide kink-resistance upon being to said distal portion, the length of said distal portion being less than one tenth the length of said proximal portion.
Claim 10
Dependent Claim
96 words
An intravascular catheter which comprises a proximal portion and a distal portion, said proximal portion having greater torsional stiffness than said distal portion and carrying a braided wire tubular support member embedded therein, said distal portion having greater bendability than said proximal portion, the improvement comprising, in combination: said distal portion carrying a helical wire support member completely embedded therein, said helical support member being essentially free of crossing wires, to provide kink-resistance upon being to said distal portion, the length of said distal portion being less than one tenth the length of said proximal portion.
Claim 11
Dependent Claim
20 words
The catheter of claim 8 in which said helical support member defines embedded coils that are spaced from each other.
Claim 12
Dependent Claim
42 words
The catheter of claim 9 in which said distal catheter portion comprises a plastic material that is softer than the plastic material of the proximal catheter proportion, said distal catheter portion plastic material having a Shore D durometer of 35 to 45.
Claim 13
Dependent Claim
15 words
The catheter of claim 10 in which said distal catheter portion defines a preformed bend.
Claim 14
Dependent Claim
21 words
The catheter of claim 11 in which said distal catheter portion carries a distal tip that is free of supporting strands.
Claim 15
Dependent Claim
32 words
The catheter of claim 8 in which the wire of said helical support member defines a rectangular cross section, with the width of said wire being greater than the radial depth thereof.
Claim 16
Dependent Claim
136 words
An intravascular catheter which comprises: an elongated tube having a proximal portion and a distal portion; said proximal portion extending most of the length of the catheter and having a greater torsional stiffness than said distal portion; said distal portion defining a smooth-walled lumen and having a greater bendability than said proximal portion, and comprising a softer plastic material than the material from which the proximal portion is formed; a helical wire support member carried by said distal portion only, to provide kink-resistance upon bending of said distal portion and to aid in providing greater bendability than said proximal portion, the helical wire support member defining coils, said proximal portion carrying a tubular braid, said braid being completely embedded within said proximal portion and said helical wire support member being completely embedded within said distal portion.
Claim 17
Dependent Claim
136 words
An intravascular catheter which comprises: an elongated tube having a proximal portion and a distal portion; said proximal portion extending most of the length of the catheter and having a greater torsional stiffness than said distal portion; said distal portion defining a smooth-walled lumen and having a greater bendability than said proximal portion, and comprising a softer plastic material than the material from which the proximal portion is formed; a helical wire support member carried by said distal portion only, to provide kink-resistance upon bending of said distal portion and to aid in providing greater bendability than said proximal portion, the helical wire support member defining coils, said proximal portion carrying a tubular braid, said braid being completely embedded within said proximal portion and said helical wire support member being completely embedded within said distal portion.
Claim 18
Dependent Claim
49 words
An intravascular catheter as defined by claim 14, in which said helical wire support member is free of wire extending inside of the helix, whereby a clear, open volume is provided within the helix to facilitate passage of PTCA catheters or the like within said helical wire support member.
Claim 19
Dependent Claim
50 words
An intravascular catheter as defined by claim 14, in which said distal portion comprises an inner tubular member, said helical wire support member being carried by said inner tubular member and positioned outside of said inner tubular member, and an outer tubular section embedding said helical wire support member therein.
Claim 20
Dependent Claim
15 words
The intravascular catheter of claim 14 in which said coils are spaced from each other.
Claim 21
Dependent Claim
110 words
An intravascular catheter which comprises: an elongated tube having a proximal portion and a distal portion; said proximal portion extending most of the length of the catheter and having a greater torsional stiffness than said distal portion; said distal portion having a greater bendability than said proximal portion; a helical wire support member completely embedded within said distal portion only to provide kink-resistance upon bending of said distal portion and to aid in providing greater bendability than said proximal portion, said distal portion, in its natural, unstressed configuration, being curved where said helical wire support member is carried; said proximal portion carrying a braided wire tubular support member embedded therein.
Claim 22
Dependent Claim
110 words
An intravascular catheter which comprises: an elongated tube having a proximal portion and a distal portion; said proximal portion extending most of the length of the catheter and having a greater torsional stiffness than said distal portion; said distal portion having a greater bendability than said proximal portion; a helical wire support member completely embedded within said distal portion only to provide kink-resistance upon bending of said distal portion and to aid in providing greater bendability than said proximal portion, said distal portion, in its natural, unstressed configuration, being curved where said helical wire support member is carried; said proximal portion carrying a braided wire tubular support member embedded therein.
Claim 23
Dependent Claim
22 words
The intravascular catheter of claim 18 in which said distal portion is less than one tenth the length of said proximal portion.
Claim 24
Dependent Claim
19 words
The intravascular catheter of claim 18 in which said helical wire support member has coils spaced from each other.
Claim 25
Dependent Claim
32 words
The catheter of claim 18 in which said distal portion comprises a plastic material having a shore "D" durometer of 25 to 50, while said proximal portion comprises a stiffer plastic material.
Claim 26
Dependent Claim
32 words
The catheter of claim 14 in which the wire of said helical support member defines a rectangular cross section, with the width of said wire being greater than the radial depth thereof.
Claim 27
Dependent Claim
21 words
The catheter of claim 22 in which said distal catheter portion carries a distal tip that is free of supporting strands.
Claim 28
Dependent Claim
15 words
The catheter of claim 23 in which said distal catheter portion defines a preformed bend.
References Cited (Backward Citations)
US3426744A
Cited
US3618613A
Cited
US3890976A
Cited
US3924632A
Cited
US4044765A
Cited
US4430083A
Cited
US4899787A
Cited
US4516972A
Cited
US4665604A
Cited
US4498473A
Cited
US4531943A
Cited
US4577543A
Cited
US4842590A
Cited
US4610674A
Cited
US4705511A
Cited
US4634432A
Cited
US4737153A
Cited
US4886506A
Cited
US4817613A
Cited
US4955862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-17 | 1997-07-19 | 1998-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-17 | 2001-07-19 | 2002-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-17 | 2005-07-19 | 2006-01-18 | $7700.00 | Window Closed / Lapsed |