US4834709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preformable catheter
Assignee: Covidien AG
•
Filing: 1988-01-19
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Granted: 1989-05-30
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Expires: 2008-01-19
Abstract
Abstract A catheter and stylet assembly is provided which includes a silicone rubber catheter for insertion into the left ventricle of the heart. A stylet of malleable metal covered by a plastic cover is inserted into the catheter to permit the catheter and stylet to be manually shaped into a desired form before insertion into the patient. The stylet is removable from the catheter after the catheter is in the patient.
Inventors
- 👤 Robert D. Banning
- 👤 Ronald Crouther
- 👤 Thomas W. Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:49
CPC Classifications
A; A61; A61M; A61M39/00; A61M25/00; A61M25/0021; A61M25/0041; A61M25/01; A61M25/09; A61M25/09016; A61M25/09025
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
113 words
A catheter and stylet assembly comprising a tube of flexible material adapted for insertion into a patient and having a lumen extending therein, and a stylet assembly removalby insertable into said lumen including only one malleable metal wire, tubular cover means surrounding and covering at least a major portion of said wire including a portion adjacent the distal end of said wire, and a handle connected to proximal end portions of said wire and said tubular cover means, said tubular cover means having an inner diameter sufficiently greater than the outer diameter of said wire so as to allow insertion of said wire into said tubular cover means during assembly of said stylet.
Claim 2
Dependent Claim
113 words
A catheter and stylet assembly comprising a tube of flexible material adapted for insertion into a patient and having a lumen extending therein, and a stylet assembly removalby insertable into said lumen including only one malleable metal wire, tubular cover means surrounding and covering at least a major portion of said wire including a portion adjacent the distal end of said wire, and a handle connected to proximal end portions of said wire and said tubular cover means, said tubular cover means having an inner diameter sufficiently greater than the outer diameter of said wire so as to allow insertion of said wire into said tubular cover means during assembly of said stylet.
Claim 3
Dependent Claim
35 words
The assembly of claim 1 wherein said tube is of an elastomeric material, and said cover means is of a plastic material which is slidable relative to said tube while in contact with said tube.
Claim 4
Dependent Claim
11 words
The assembly of claim 1 wherein said material is silicone rubber.
Claim 5
Dependent Claim
12 words
The assembly of claim 3 wherein said cover means if of polypropylene.
Claim 6
Dependent Claim
12 words
The assembly of claim 1 wherein said wire is of malleable aluminum.
Claim 7
Dependent Claim
35 words
The assembly of claim 1 wherein said cover means includes a sleeve extending distally beyond the distal end of said wire and closed at its distal end to cover the distal end of said wire.
Claim 8
Dependent Claim
32 words
The assembly of claim 1 wherein the proximal ends of said wire and said cover means are sealingly fixed within said handle with said handle and cover together completely enclosing said wire.
Claim 9
Dependent Claim
67 words
The assembly of claim 7 wherein said lumen is closed at the distal end of said tube, and said tube has a plurality of openings extending through the sidewalls of said tube adjacent to but spaced from the distal end of said tube, said tube is formed of silicone rubber, and said cover means includes a plastic layer slidable relative to said tube while in contact therewith.
Claim 10
Dependent Claim
46 words
The assembly of claim 7 wherein a proximal end portion of said cover means extends into said handle and said cover means is tubing receiving said wire and completely covering the entire free surface of said wire from the distal end thereof to to said handle.
Claim 11
Dependent Claim
18 words
The assembly of claim 9 wherein said wire is of aluminum and solid in cross-section and substantially straight.
Claim 12
Dependent Claim
20 words
The assembly of claim 1 wherein the cross-sectional area of said cover means is greater than that of said wire.
Claim 13
Dependent Claim
23 words
The assembly of claim 1 wherein the outer diameter of said stylet is at least 60% of the diameter of said catheter lumen.
Claim 14
Dependent Claim
22 words
The assembly of claim 12 wherein the outer diameter of said stylet is about 80% of the diameter of said catheter lumen.
Claim 15
Dependent Claim
30 words
The assembly of claim 1 wherein said cover means is a portion of a tubular plastic extrudate and wherein said wire and said cover means are generally straight and bendable.
Claim 16
Dependent Claim
32 words
The assembly of claim 1 wherein said handle includes releasable latching means for releasably securing said handle to the proximal end portion of said tube with said stylet extending in said tube.
Claim 17
Dependent Claim
131 words
A cardiopulmonary bypass vascular catheter comprising a catheter of silicone rubber having a lumen closed at the distal end, said catheter having a plurality of openings adjacent the distal end extending through the sidewall thereof, and a stylet removably insertable into said lumen and extending substantially to the distal end of said lumen when fully inserted therein, said stylet including only one malleable metal wire, a tubular sleeve of a plastic material covering substantially the entire outer surface of said wire, and a handle connected to the proximal end portions of said sleeve and said wire, said tubular sleeve means having an inner diameter sufficiently greater than the outer diameter of said wire so as to allow insertion of said wire into said tubular sleeve means during assembly of said stylet.
Claim 18
Dependent Claim
131 words
A cardiopulmonary bypass vascular catheter comprising a catheter of silicone rubber having a lumen closed at the distal end, said catheter having a plurality of openings adjacent the distal end extending through the sidewall thereof, and a stylet removably insertable into said lumen and extending substantially to the distal end of said lumen when fully inserted therein, said stylet including only one malleable metal wire, a tubular sleeve of a plastic material covering substantially the entire outer surface of said wire, and a handle connected to the proximal end portions of said sleeve and said wire, said tubular sleeve means having an inner diameter sufficiently greater than the outer diameter of said wire so as to allow insertion of said wire into said tubular sleeve means during assembly of said stylet.
Claim 19
Dependent Claim
23 words
The catheter of claim 16 wherein said sleeve is of a plastic which is slidable without sticking while in contact with said catheter.
Claim 20
Dependent Claim
14 words
The catheter of claim 17 wherein said plastic of said sleeve is a polypropylene.
Claim 21
Dependent Claim
21 words
The catheter of claim 1 wherein said cover means is a tubular extrudate and said wire is insertable into said extrudate.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |