US4846791A
Expired / Lapsed
US
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Multi-lumen catheter
Assignee: Advanced Medical Technology and Development Corp
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Filing: 1988-09-02
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Granted: 1989-07-11
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Expires: 2008-09-02
Abstract
Abstract A multi-lumen catheter is formed by first introducing one end of an expandable tube into the blood vessel. A divider is then inserted into the distal end of the tube and extends the length of the tube, thereby dividing the tube into a plurality of the separate lumens. Insertion of the divider causes radial expansion of the tube which substantially seals the opening in the wall of the vessel. In one embodiment, the divider has a hollow triangular cross-section which creates four separate lumens. A series of raised protrusions extending outwardly from the sides of the divider prevent collapse of the tube against the divider.
Inventors
- 👤 Brack G. Hattler
- 👤 Irvin Furman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:25
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/0034; A61M2025/0036; A61M2025/004; A61M25/0043
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
88 words
A multi-lumen catheter comprising: (a) a tube, said tube being radially expandable from a first state with a first inner radius, to a radially expanded second state with a second larger inner radius; (b) means for selectively expanding said tube from said first state to said radially expanded second state, said expanding means including an insertable divider having a radius greater than said first inner radius and substantially equal to said second inner radius, insertion of said divider thereby dividing said tube into a plurality of separate lumens.
Claim 2
Dependent Claim
88 words
A multi-lumen catheter comprising: (a) a tube, said tube being radially expandable from a first state with a first inner radius, to a radially expanded second state with a second larger inner radius; (b) means for selectively expanding said tube from said first state to said radially expanded second state, said expanding means including an insertable divider having a radius greater than said first inner radius and substantially equal to said second inner radius, insertion of said divider thereby dividing said tube into a plurality of separate lumens.
Claim 3
Dependent Claim
31 words
The multi-lumen catheter of claim 1, further comprising a number of grooves extending along the interior of the tube to guide insertion of the divider through the length of the tube.
Claim 4
Dependent Claim
27 words
The multi-lumen catheter of claim 1 further comprising a number of grooves extending longitudinally along the exterior of the tube to facilitate radial expansion of the tube.
Claim 5
Dependent Claim
13 words
The multi-lumen catheter of claim 1 wherein the divider has a polygonal cross-section.
Claim 6
Dependent Claim
27 words
The multi-lumen catheter of claim 4 wherein the divider has a hollow triangular cross-section, with the area within the divider defining an additional lumen for the catheter.
Claim 7
Dependent Claim
30 words
The multi-lumen catheter of claim 1 further comprising a series of raised protrusions extending outward along the sides of the divider to prevent collapse of the tube against the divider.
Claim 8
Independent Claim
86 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising: (a) inserting one end of an expandable tube through an opening in the wall of the blood vessel; and (b) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens and causing the tube to radially expand and substantially seal the opening between the outside of the tube and the opening in the wall of the blood vessel.
Claim 9
Independent Claim
86 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising: (a) inserting one end of an expandable tube through an opening in the wall of the blood vessel; and (b) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens and causing the tube to radially expand and substantially seal the opening between the outside of the tube and the opening in the wall of the blood vessel.
Claim 10
Dependent Claim
42 words
The method of claim 7, wherein the tube is inserted into the blood vessel by means of a hollow needle into which one end of the tube is inserted, and which is subsequently used to puncture the wall of the blood vessel.
Claim 11
Dependent Claim
12 words
The method of claim 7 wherein the divider has a polygonal cross-section.
Claim 12
Dependent Claim
29 words
The method of claim 7 wherein the divider has a cross-sectional configuration from the group consisting of a Y-shape, a cross, or a star having at least five points.
Claim 13
Dependent Claim
11 words
The method of claim 7 wherein divider has a triangular cross-section.
Claim 14
Dependent Claim
17 words
The method of claim 7 wherein the divider has a formed lumen extending axially within the divider.
Claim 15
Independent Claim
86 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising: (a) inserting one end of an expandable tube through an opening in the wall of the blood vessel by means of a hollow needle into which one end of the tube is inserted, and which is subsequently used to puncture the wall of the blood vessel; and (b) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens.
Claim 16
Independent Claim
86 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising: (a) inserting one end of an expandable tube through an opening in the wall of the blood vessel by means of a hollow needle into which one end of the tube is inserted, and which is subsequently used to puncture the wall of the blood vessel; and (b) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens.
Claim 17
Independent Claim
106 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising in the order of: (a) inserting one end of an expandable tube into a hollow needle; (b) inserting the needle through the wall of a blood vessel, so that the end of the tube inside the needle enters the blood vessel; (c) retracting the needle from the blood vessel and removing the needle from the tube, thereby leaving the end of the tube inside the blood vessel; (d) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens.
Claim 18
Independent Claim
106 words
A method of inserting a multi-lumen catheter into a blood vessel, comprising in the order of: (a) inserting one end of an expandable tube into a hollow needle; (b) inserting the needle through the wall of a blood vessel, so that the end of the tube inside the needle enters the blood vessel; (c) retracting the needle from the blood vessel and removing the needle from the tube, thereby leaving the end of the tube inside the blood vessel; (d) inserting a divider from the distal end of the tube through the length of the tube, thereby dividing the tube into a plurality of separate lumens.
Claim 19
Dependent Claim
37 words
The method of claim 14 wherein insertion of the divider into the tube causes the tube to radially expand, thereby substantially sealing the opening between the outside of the tube and the wall of the blood vessel.
Claim 20
Dependent Claim
11 words
The method of claim 14 wherein divider has a triangular cross-section.
Claim 21
Dependent Claim
23 words
The method of claim 16 wherein the divider has a hollow triangular cross-section, with the area within the divider defining a separate lumen.
Claim 22
Dependent Claim
25 words
The method of claim 14 wherein the needle has a slit extending its length through which the tube can be removed from inside the needle.
Claim 23
Dependent Claim
12 words
The method of claim 14 wherein the divider has a polygonal cross-section.
Claim 24
Dependent Claim
29 words
The method of claim 14 wherein the divider has a cross-sectional configuration from the group consisting of a Y-shape, a cross, or a star having at least five points.
Claim 25
Dependent Claim
17 words
The method of claim 14 wherein the divider has a formed lumen extending longitudinally with the divider.
Claim 26
Dependent Claim
28 words
The method of claim 14 wherein a number of grooves extending along the interior of the tube guide insertion of the divider through the length of the tube.
Claim 27
Dependent Claim
30 words
The method of claim 14 wherein a number of grooves extend longitudinally along the exterior of the tube to facilitate radial expansion of said tube as the divider is inserted.
Claim 28
Dependent Claim
25 words
The method of claim 14 wherein a series of raised protrusions extend outward from the divider to prevent collapse of the tube against the divider.
References Cited (Backward Citations)
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Cited
US3598118A
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US3584624A
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US4203436A
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Cited
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Cited
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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) | 1992-07-10 | 1993-01-09 | 1993-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-10 | 1997-01-09 | 1997-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-10 | 2001-01-09 | 2001-07-11 | $7700.00 | Window Closed / Lapsed |