US4955895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vasodilating catheter
Assignee: Terumo Corp
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Filing: 1987-12-22
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Granted: 1990-09-11
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Expires: 2007-12-22
Abstract
Abstract A vasodilating catheter is disclosed which is characterized by using a triple-flow catheter tube and allowing two of the three flow paths formed by the catheter tube to communicate with a balloon. Owing to this configuration, the air entrapped inside the balloon can be easily removed and, as the result, the otherwise inevitable degradation of the balloon's opacitying property is precluded and the angioplasty is performed with increased safety and ease.
Inventors
- 👤 Yoshiaki Sugiyama
- 👤 Kyuta Sagae
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:55
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M2025/0004; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/0039; A61M25/1006
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
150 words
A vasodilating catheter, comprising: a triple-flow catheter tube having a leading end and a basal end, and comprising an inner tube opening at a leading end thereof and defining a first flow path, a middle tube encircling said inner tube and defining a second flow path jointly with said inner tube, and an outer tube encircling said middle tube and defining a third flow path jointly with said middle tube, an at least partially cylindrical foldable balloon attached to the outer periphery of said triple-flow catheter tube so as to enclose therewith openings of said second flow path and said third flow path in the proximity of the leading end of said triple-flow catheter tube and to form a space communicating with said second flow path and said third flow path, and three ports communicating with said three flow paths, attached to the basal end of said triple-flow catheter tube.
Claim 2
Dependent Claim
150 words
A vasodilating catheter, comprising: a triple-flow catheter tube having a leading end and a basal end, and comprising an inner tube opening at a leading end thereof and defining a first flow path, a middle tube encircling said inner tube and defining a second flow path jointly with said inner tube, and an outer tube encircling said middle tube and defining a third flow path jointly with said middle tube, an at least partially cylindrical foldable balloon attached to the outer periphery of said triple-flow catheter tube so as to enclose therewith openings of said second flow path and said third flow path in the proximity of the leading end of said triple-flow catheter tube and to form a space communicating with said second flow path and said third flow path, and three ports communicating with said three flow paths, attached to the basal end of said triple-flow catheter tube.
Claim 3
Dependent Claim
43 words
A vasodilating catheter according to claim 1, wherein the opening of said second flow path is in the proximity of one end of said balloon, and the opening of said third flow path in the proximity of the other end of said balloon.
Claim 4
Dependent Claim
53 words
A vasodilating catheter according to claim 1, wherein the opening of said second flow path is in the proximity of said catheter tube's leading end side terminal of said balloon, and the opening of said third flow path is in the proximity of said catheter tube's leading end side terminal of said balloon.
Claim 5
Dependent Claim
34 words
A vasodilating catheter according to claim 1, wherein said middle tube is provide on the inner peripheral surface thereof with at least one protuberance contiguous to the outer peripheral surface of said inner tube.
Claim 6
Dependent Claim
70 words
A vasodilating catheter according to claim 1, wherein: the leading end of said middle tube is tapered to a diameter equal to or slightly smaller than the outside diameter of said inner tube and fitted into said inner tube and fastened thereto, and said second flow path communicates with said balloon through the medium of at least one lateral hole formed in said middle tube near the leading end thereof.
Claim 7
Dependent Claim
70 words
A vasodilating catheter according to claim 1, wherein: the leading end of said outer tube is tapered to a diameter equal to or slightly smaller than the outside diameter of said middle tube and fitted into said middle tube and fastened thereto, and said third flow path communicates with said balloon through the medium of at least one lateral hole formed in said outer tube near the leading end thereof.
Claim 8
Dependent Claim
30 words
A vasodilating catheter according to claim 1, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
Claim 9
Dependent Claim
20 words
A vasodilating catheter according to claim 1, wherein said triple-flow catheter tube and said balloon are formed with thermoplastic resin.
Claim 10
Dependent Claim
22 words
A vasodilating catheter according to claim 1, wherein the hardness of said balloon is lower than that of said triple-flow catheter tube.
Claim 11
Dependent Claim
35 words
A vasodilating catheter according to claim 1, wherein the outer surface of said outer tube, the outer surface of said balloon, and the inner surface of said inner tube and treated for impartation of hydrophilicity.
Claim 12
Dependent Claim
25 words
A vasodilating catheter according to claim 5, wherein said leading end of said middle tube is fastened to said inner tube with an adhesive agent.
Claim 13
Dependent Claim
24 words
A vasodilating catheter according to claim 5, wherein said leading end of said middle tube is fastened to said inner tube by thermal fusion.
Claim 14
Dependent Claim
25 words
A vasodilating catheter according to claim 6, wherein said leading end of said outer tube is fastened to said inner tube with an adhesive agent.
Claim 15
Dependent Claim
24 words
A vasodilating catheter according to claim 6, wherein said leading end of said middle tube is fastened to said inner tube by thermal fusion.
Claim 16
Dependent Claim
30 words
A vasodilating catheter according to claim 2, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
Claim 17
Dependent Claim
30 words
A vasodilating catheter according to claim 3, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
Claim 18
Dependent Claim
30 words
A vasodilating catheter according to claim 4, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
Claim 19
Dependent Claim
30 words
A vasodilating catheter according to claim 5, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
Claim 20
Dependent Claim
30 words
A vasodilating catheter according to claim 6, wherein said inner tube, said middle tube, and said outer tube of said triple-flow catheter tube are disposed coaxially relative to one another.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-10 | 1994-03-12 | 1994-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-10 | 1998-03-12 | 1998-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-10 | 2002-03-12 | 2002-09-11 | $7700.00 | Window Closed / Lapsed |