US6168579B1
Expired / Lapsed
US
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Filter flush system and methods of use
Assignee: Boston Scientific Scimed Inc
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Filing: 1999-08-04
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Granted: 2001-01-02
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Expires: 2019-08-04
Abstract
Abstract A filter flush system for temporary placement of a filter in an artery or vein is disclosed. The system typically includes a guidewire insertable within a guiding catheter, which has an occlusion balloon disposed about its distal end. The guidewire has an expandable filter, which can be collapsed to pass through a lumen and distal port of the guiding catheter. The lumen is adapted to receive a variety of endovascular devices, including angioplasty, atherectomy, and stenting catheters. Fluid medium or blood can be infused through the lumen of the guiding catheter to flush embolic material or mobile plaque generated during the endovascular procedures toward the expanded filter deployed downstream from the region of interest. Methods of using the filter flush system to entrap and remove embolic material from the vessel are also disclosed.
Inventors
- 👤 Ross S. Tsugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:16
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61F; A61F2/00; A61F2/01; A61F2/0108; A61F2/013; A61B17/22; A61F2/82; A61F2/95; A61F2/958; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067; A61F2230/0073; A61F2230/008; A61F2230/0093; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09175; A61M25/10; A61M2025/1043; A61M2025/1052; A61M25/06; A61M25/0662
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
70 words
A vessel filtering system, comprising: a guidewire having a proximal end and a distal end; an expandable filter mounted at the distal end of the guidewire; a guiding catheter having a proximal end, a distal end, and a lumen therebetween, the lumen adapted to receive the guidewire which passes through a distal port on the guiding catheter; and an occlusion balloon disposed about the distal end of the guiding catheter.
Claim 2
Dependent Claim
70 words
A vessel filtering system, comprising: a guidewire having a proximal end and a distal end; an expandable filter mounted at the distal end of the guidewire; a guiding catheter having a proximal end, a distal end, and a lumen therebetween, the lumen adapted to receive the guidewire which passes through a distal port on the guiding catheter; and an occlusion balloon disposed about the distal end of the guiding catheter.
Claim 3
Dependent Claim
39 words
The system of claim 1 , further comprising an angioplasty catheter having a proximal end, a distal end, a lumen which receives the guidewire, and wherein the lumen of the guiding catheter is adapted to receive the angioplasty catheter.
Claim 4
Dependent Claim
21 words
The system of claim 1 , wherein the expandable filter comprises an expansion frame and a mesh disposed over the frame.
Claim 5
Dependent Claim
11 words
The system of claim 3 , wherein the mesh is woven.
Claim 6
Dependent Claim
19 words
The system of claim 3 , wherein the mesh comprises a thin film having holes to allow fluid flow.
Claim 7
Dependent Claim
31 words
The system of claim 3 , wherein the frame comprises a plurality of struts bonded to the guidewire at a first end, and which expands radially outward at a second end.
Claim 8
Dependent Claim
13 words
The system of claim 3 , wherein the frame comprises an inflation seal.
Claim 9
Dependent Claim
26 words
The system of claim 1 , wherein the guiding catheter includes an aspiration port distal the occlusion balloon, the aspiration port communicating with an aspiration lumen.
Claim 10
Dependent Claim
15 words
The system of claim 2 , further comprising a stent disposed about the angioplasty catheter.
Claim 11
Dependent Claim
15 words
The system of claim 1 , wherein the occlusion balloon communicates with an inflation lumen.
Claim 12
Dependent Claim
39 words
The system of claim 1 , further comprising an atherectomy catheter having a proximal end, a distal end, a lumen which receives the guidewire, and wherein the lumen of the guiding catheter is adapted to receive the angioplasty catheter.
Claim 13
Dependent Claim
19 words
The system of claim 1 , wherein the guiding catheter includes an infusion port proximal to the occlusion balloon.
Claim 14
Dependent Claim
18 words
The system of claim 12 , wherein the infusion port communicates with the lumen of the guiding catheter.
Claim 15
Dependent Claim
19 words
The system of claim 2 , wherein the angioplasty catheter includes an infusion port proximal to the angioplasty balloon.
Claim 16
Dependent Claim
19 words
The system of claim 14 , wherein the infusion port communicates with a perfusion port distal the angioplasty balloon.
Claim 17
Independent Claim
108 words
A method for flushing embolic debris into a filter, comprising the steps of: providing a guidewire having an expandable filter at a distal end; providing a guiding catheter having an occlusion balloon at a distal end and a lumen extending to a port at the distal end; inserting the guidewire into a vessel; advancing the expandable filter beyond a region of interest; expanding the filter; inserting the guiding catheter over the guidewire and positioning the occlusion balloon proximal the region of interest; expanding the occlusion balloon to occlude the vessel; and infusing fluid through the lumen of the guiding catheter to flush atheromatous material into the expandable filter.
Claim 18
Independent Claim
108 words
A method for flushing embolic debris into a filter, comprising the steps of: providing a guidewire having an expandable filter at a distal end; providing a guiding catheter having an occlusion balloon at a distal end and a lumen extending to a port at the distal end; inserting the guidewire into a vessel; advancing the expandable filter beyond a region of interest; expanding the filter; inserting the guiding catheter over the guidewire and positioning the occlusion balloon proximal the region of interest; expanding the occlusion balloon to occlude the vessel; and infusing fluid through the lumen of the guiding catheter to flush atheromatous material into the expandable filter.
Claim 19
Dependent Claim
22 words
The method of claim 16 , wherein the guiding catheter is inserted over the guidewire before the step of expanding the filter.
Claim 20
Dependent Claim
28 words
The method of claim 16 , wherein the guiding catheter is inserted over the guidewire before the step of advancing the expandable filter beyond the region of interest.
Claim 21
Dependent Claim
12 words
The method of claim 16 , wherein the vessel is coronary artery.
Claim 22
Dependent Claim
13 words
The method of claim 16 , wherein the vessel is the carotid artery.
References Cited (Backward Citations)
DE3417738A1
Cited
US4873978A
Cited
US5423742A
Cited
US5330484A
Cited
US5053008A
Cited
EP0533511A1
Cited
US5224953A
Cited
US5769816A
Cited
US5749848A
Cited
US5662671A
Cited
WO1998039046A1
Cited
US5910154A
Cited
WO1999022673A1
Cited
US5925060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-01-02 | 2004-07-03 | 2005-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-01-02 | 2008-07-03 | 2009-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-01-02 | 2012-07-03 | 2013-01-02 | $7700.00 | Window Closed / Lapsed |