Patent US4968307A successfully refreshed from Google Patents.
US4968307A
Expired / Lapsed
US
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Catheter for uniform distribution of therapeutic fluids
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1989-04-10
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Granted: 1990-11-06
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Expires: 2009-04-10
Abstract
Abstract A vascular catheter for delivering a uniform flow of therapeutic fluid over a length of the catheter. The catheter is particularly suitable for delivering thrombolytic agents to a thrombus or clot in a patient's arterial system. In a preferred embodiment, the catheter has a relatively thick-walled tubular body with a central lumen for advancement over a guidewire and a plurality of fluid delivering lumens disposed within the relatively thick wall. Each of the smaller lumens has a single flow passageway to discharge therapeutic fluid to the exterior of the catheter.
Inventors
- 👤 Michael D. Dake
- 👤 Mark A. Maguire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:07
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
127 words
A multilumen vascular catheter for the uniform delivery of fluid containing drugs, therapeutic agents and the like comprising an elongated tubular body having a wall defining a first lumen for receiving a guidewire to facilitate the advancement of the catheter through a patient's vasculature and a plurality of second lumens disposed longitudinally within the wall, each of said second lumens having a flow passageway in a distal portion of the catheter extending from the second lumen through the wall of the tubular body to the exterior thereof with the flow passageways having a minimum crosssectional area of about 1×10 -6 to about 5×10 -4 and being longitudinally spaced from each other so that a uniform flow of fluid is discharged over the distal portion of the catheter.
Claim 2
Dependent Claim
127 words
A multilumen vascular catheter for the uniform delivery of fluid containing drugs, therapeutic agents and the like comprising an elongated tubular body having a wall defining a first lumen for receiving a guidewire to facilitate the advancement of the catheter through a patient's vasculature and a plurality of second lumens disposed longitudinally within the wall, each of said second lumens having a flow passageway in a distal portion of the catheter extending from the second lumen through the wall of the tubular body to the exterior thereof with the flow passageways having a minimum crosssectional area of about 1×10 -6 to about 5×10 -4 and being longitudinally spaced from each other so that a uniform flow of fluid is discharged over the distal portion of the catheter.
Claim 3
Dependent Claim
26 words
The vascular catheter of claim 1 wherein the first lumen is defined by a cylindrically shaped wall and is centrally disposed along the longitudinal axis thereof.
Claim 4
Dependent Claim
18 words
The vascular catheter of claim 2 wherein the plurality of second lumens are disposed about the first lumen.
Claim 5
Dependent Claim
24 words
The vascular catheter of claim 1 including means at the proximal end of the catheter for directing fluid into the plurality of second lumens.
Claim 6
Dependent Claim
27 words
The vascular catheter of claim 1 wherein the minimum cross-sectional areas of each of the flow passageways through the wall of the catheter are essentially the same.
Claim 7
Dependent Claim
25 words
The vascular catheter of claim 1 wherein the flow passageways are spaced longitudinally from one another a distance of about 0.5 to about 5 cm.
Claim 8
Dependent Claim
14 words
The vascular catheter of claim 1 wherein at least four second lumens are provided.
Claim 9
Dependent Claim
31 words
The catheter of claim 1 wherein the flow passageways are radially spaced about the longitudinal axis of the tubular body from each other so as to be in a spiral orientation.
Claim 10
Independent Claim
84 words
The method of treating a thrombus within a patient's vascular system comprising: (a) advancing a guidewire through the patient's vasculature and passing the distal tip thereof through the thrombus to be treated; (b) advancing a vascular catheter over the guidewire and urging the distal portion of the catheter into the thrombus; and (c) uniformly discharging fluid containing thrombolytic agents through passageways provided in the distal portion of the catheter into the thrombus at a rate of about 0.1 to about 2 cc per minute.
Claim 11
Independent Claim
84 words
The method of treating a thrombus within a patient's vascular system comprising: (a) advancing a guidewire through the patient's vasculature and passing the distal tip thereof through the thrombus to be treated; (b) advancing a vascular catheter over the guidewire and urging the distal portion of the catheter into the thrombus; and (c) uniformly discharging fluid containing thrombolytic agents through passageways provided in the distal portion of the catheter into the thrombus at a rate of about 0.1 to about 2 cc per minute.
Claim 12
Dependent Claim
22 words
The method of claim 9 wherein the thrombolytic agents are selected from the group consisting of urokinase, streptokinase, and tissue plasminogen activator.
Claim 13
Dependent Claim
16 words
The method of claim 9 wherein the treatment is followed by balloon angioplasty or atherectomy procedures.
References Cited (Backward Citations)
US4795439A
Cited
US4769005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |