US6524323B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method of use for revascularizing stenotic bypass grafts and other occluded blood vessels
Assignee: DSM Biomedical Inc
•
Filing: 2000-06-14
•
Granted: 2003-02-25
•
Expires: 2020-06-14
Abstract
Abstract A system and method for opening a lumen in an occluded blood vessel, e.g., a coronary bypass graft, of a living being. The system comprises an atherectomy catheter having a working head, e.g., a rotary impacting impeller, and a debris extraction sub-system. The atherectomy catheter is located within a guide catheter. The working head is arranged to operate on, e.g., impact, the occlusive material in the occluded vessel to open a lumen therein, whereupon some debris may be produced. The debris extraction sub-system introduces an infusate liquid at a first flow rate adjacent the working head and withdraws that liquid and some blood at a second and higher flow rate, through the guide catheter to create a differential flow adjacent the working head, whereupon the debris is withdrawn in the infusate liquid and blood for collection outside the being's body. The introduction of the infusate liquid may also be used to establish an unbalanced flow adjacent the working head to enable the atherectomy catheter to be steered hydrodynamically. A guide wire having an inflatable balloon on its distal end may be used with the atherectomy catheter to block the flow of debris distally, while enabling distal tissues to be perfused with an oxygenating liquid. At least one flow control port may be provided in the guide catheter to prevent collapse of the vessel being revascularized. A cradle is provided to fix the guide catheter and guide wire in position within the body of the being while enabling the atherectomy catheter to be advanced along the guide wire and through the guide catheter.
Inventors
- 👤 John E. Nash
- 👤 William T. Fisher
- 👤 Charles W. Dodson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:47
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/3203; A61B17/32037; A61B17/22; A61B17/3205; A61B17/3207; A61B17/320758; A61B2017/22038; A61B2017/22047; A61B2017/22048; A61B2017/22051; A61B2017/22065; A61B2017/22067; A61B2017/320775; A61B2217/00; A61B2217/002; A61B2217/005; A61B2217/007; A61M; A61M1/00; A61M1/71; A61M1/77; A61M1/84; A61M1/85; A61M25/00; A61M25/10; A61M2025/1043; A61M2025/1095; A61M2205/00; A61M2205/05; A61M5/00; A61M5/14; A61M5/142; A61M5/14212; A61M5/14232
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
106 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said system comprising a stent, an instrument for deploying said stent and a debris extraction system, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, whereupon some debris may be produced, said debris extraction system being arranged for removing debris produced during the deployment of said stent.
Claim 2
Dependent Claim
106 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said system comprising a stent, an instrument for deploying said stent and a debris extraction system, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, whereupon some debris may be produced, said debris extraction system being arranged for removing debris produced during the deployment of said stent.
Claim 3
Dependent Claim
35 words
The intravascular system of claim 1 additionally comprising a catheter through which said instrument extends to form a passageway therebetween, the debris being withdrawn through said passageway for collection remote from the occluded blood vessel.
Claim 4
Dependent Claim
13 words
The intravascular system of claim 2 wherein said catheter comprises a guide catheter.
Claim 5
Dependent Claim
13 words
The intravascular system of claim 3 wherein said catheter comprises an introducer sheath.
Claim 6
Dependent Claim
24 words
The intravascular system of claim 1 wherein said system additionally comprises a working head for removing occlusive material from the occluded blood vessel portion.
Claim 7
Dependent Claim
12 words
The intravascular system of claim 5 wherein said working head is rotatable.
Claim 8
Dependent Claim
38 words
The intravascular system of claim 5 wherein debris may be produced during the operation of said working head, and wherein said debris extraction system is arranged for removing the debris produced by the operation of said working head.
Claim 9
Dependent Claim
160 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said system comprising a stent, an instrument for deploying said stent and a debris extraction system, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, whereupon some debris may be produced, said debris extraction system being arranged for removing the debris during the deployment of said stent, said debris extraction system being arranged for introducing an infusate liquid at a first flow rate adjacent the occlusive material and withdrawing said liquid at a second and higher flow rate to create a differential flow adjacent the occlusive material, whereupon the debris is withdrawn by said differential flow from the occluded vessel portion.
Claim 10
Dependent Claim
160 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material, said system comprising a stent, an instrument for deploying said stent and a debris extraction system, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, whereupon some debris may be produced, said debris extraction system being arranged for removing the debris during the deployment of said stent, said debris extraction system being arranged for introducing an infusate liquid at a first flow rate adjacent the occlusive material and withdrawing said liquid at a second and higher flow rate to create a differential flow adjacent the occlusive material, whereupon the debris is withdrawn by said differential flow from the occluded vessel portion.
Claim 11
Dependent Claim
35 words
The intravascular system of claim 8 additionally comprising a catheter through which said instrument extends to form a passageway therebetween, the debris being withdrawn through said passageway for collection remote from the occluded blood vessel.
Claim 12
Dependent Claim
22 words
The intravascular system of claim 9 additionally comprising a debris blocking member for preventing the debris from flowing into downstream blood vessels.
Claim 13
Dependent Claim
14 words
The intravascular system of claim 10 wherein said debris blocking member comprises a balloon.
Claim 14
Dependent Claim
15 words
The intravascular system of claim 8 wherein the first and second flow rates are adjustable.
Claim 15
Dependent Claim
24 words
The intravascular system of claim 8 wherein said system additionally comprises a working head for removing occlusive material from the occluded blood vessel portion.
Claim 16
Dependent Claim
130 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material whereupon some debris may be produced from the occlusive material, said system comprising a stent, an instrument for deploying said stent, a debris extraction system, and a debris blocking member, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, said debris extraction system being arranged for removing the debris, said debris blocking member being arranged for preventing the debris from flowing into a downstream blood vessel during deployment of said stent.
Claim 17
Dependent Claim
130 words
An intravascular system for opening a lumen in an occluded blood vessel portion of a living being's vascular system, the occluded blood vessel portion being occluded by an occlusive material whereupon some debris may be produced from the occlusive material, said system comprising a stent, an instrument for deploying said stent, a debris extraction system, and a debris blocking member, said instrument being arranged to be extended into the lumen to deploy said stent to the occlusive material in the interior of the occluded blood vessel portion to open a lumen therein for the flow of blood therethrough, said debris extraction system being arranged for removing the debris, said debris blocking member being arranged for preventing the debris from flowing into a downstream blood vessel during deployment of said stent.
Claim 18
Dependent Claim
14 words
The intravascular system of claim 14 wherein said debris blocking member comprises a balloon.
Claim 19
Dependent Claim
24 words
The intravascular system of claim 14 wherein said system additionally comprises a working head for removing occlusive material from the occluded blood vessel portion.
References Cited (Backward Citations)
US4445509A
Cited
US4589412A
Cited
US4631052A
Cited
US4842579B1
Cited
US4842579A
Cited
US4762129A
Cited
US4762129B1
Cited
US4790813A
Cited
US4686982A
Cited
US4679558A
Cited
US4700705A
Cited
US4696667A
Cited
US4747821A
Cited
US4749376A
Cited
US5314407A
Cited
US4883458A
Cited
US4857045A
Cited
US4898575A
Cited
US5195956A
Cited
EP0353087A2
Cited
US4957482A
Cited
US5087265A
Cited
US5042984A
Cited
US5097849A
Cited
US5282484A
Cited
US5423742A
Cited
US5009659A
Cited
US5030201A
Cited
US5074841A
Cited
US5366463A
Cited
US5267955A
Cited
US5395311A
Cited
US5402790A
Cited
US5368603A
Cited
US5370609A
Cited
US5114399A
Cited
US5496267A
Cited
US5409454A
Cited
US5273526A
Cited
WO1993000119A1
Cited
US5284468A
Cited
US5224945A
Cited
US5358472A
Cited
US5632755A
Cited
US5665098A
Cited
US5429136A
Cited
WO1995021576A1
Cited
US5868767A
Cited
US5681336A
Cited
US5882329A
Cited
US6135991A
Cited
US5954745A
Cited
US5947985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2006-02-24 | 2006-08-26 | 2007-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-02-24 | 2010-08-26 | 2011-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-02-24 | 2014-08-26 | 2015-02-25 | $7700.00 | Window Closed / Lapsed |