US6991641B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low profile vascular filter system
Assignee: Cordis US Corp
•
Filing: 2002-03-12
•
Granted: 2006-01-31
•
Expires: 2022-03-12
Abstract
Abstract A removable, low profile, vascular filter system for capture and retrieval of emboli while allowing continuous perfusion of blood, comprising a guidewire having proximal and distal markers, a filter delivery and deployment system, having an outer member and an inner member, and a filter removably attached near the distal end of the inner member. The filter comprises proximal and distal basket sleeves which position the filter between the proximal and distal markers on the guidewire, after the guidewire is in position past the vessel occlusion. The guidewire placement prior to filter delivery may facilitate access to the interventional site, especially through tortuous anatomy. Also, retrievability of the filter from the wire may avoid loss of guidewire position, which may occur following removal of filters permanently attached to guidewires.
Inventors
- 👤 Pedro Diaz
- 👤 Jay S. Yadav
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:30
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/0108; A61F2/011; A61F2/013; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0073; A61F2230/008; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09125
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
330 words
A vascular filter system comprising: a) a guidewire having a predetermined diameter, a proximal end, a distal end, a proximal marker having a first diameter and a distal marker having a second diameter, the proximal and distal markers being attached to the distal end of the guidewire; b) a filter deployment and delivery system including an inner member having a proximal end, a distal end, an inner diameter and an outer diameter, and an outer member having a proximal end, a distal end, an inner diameter and an outer diameter, the inner member being coaxially disposable around the guidewire and the outer member being coaxially disposable around the inner member; c) a filter removably attached to the distal end of the inner member, the filter including a filter membrane support structure having a proximal portion and a distal portion, a permeable filter membrane attached to the distal portion of the filter membrane support structure, a proximal basket sleeve connected to the proximal portion of the filter membrane support structure, the proximal basket sleeve having a diameter less than or equal to the first diameter of the proximal marker, and a distal basket sleeve connected to the distal portion of the filter membrane support structure having a diameter greater than the first diameter of the proximal marker and less than or equal to the second diameter of the distal marker such that the distal basket sleeve passes over the proximal marker and is stopped at the distal marker, the proximal basket sleeve further comprising a tapered end having a circumferentially oriented indentation and the proximal marker comprising a tapered section and a protruding ridge operatively associated with the indentation thereby allowing rotational movement and limiting longitudinal movement therebetween, the filter having a diameter for insertion and a diameter for deployment; and d) a retrieval catheter having a proximal end, a distal end, an inner diameter and an outer diameter, the retrieval catheter being coaxially disposable around the guidewire and the filter.
Claim 2
Dependent Claim
330 words
A vascular filter system comprising: a) a guidewire having a predetermined diameter, a proximal end, a distal end, a proximal marker having a first diameter and a distal marker having a second diameter, the proximal and distal markers being attached to the distal end of the guidewire; b) a filter deployment and delivery system including an inner member having a proximal end, a distal end, an inner diameter and an outer diameter, and an outer member having a proximal end, a distal end, an inner diameter and an outer diameter, the inner member being coaxially disposable around the guidewire and the outer member being coaxially disposable around the inner member; c) a filter removably attached to the distal end of the inner member, the filter including a filter membrane support structure having a proximal portion and a distal portion, a permeable filter membrane attached to the distal portion of the filter membrane support structure, a proximal basket sleeve connected to the proximal portion of the filter membrane support structure, the proximal basket sleeve having a diameter less than or equal to the first diameter of the proximal marker, and a distal basket sleeve connected to the distal portion of the filter membrane support structure having a diameter greater than the first diameter of the proximal marker and less than or equal to the second diameter of the distal marker such that the distal basket sleeve passes over the proximal marker and is stopped at the distal marker, the proximal basket sleeve further comprising a tapered end having a circumferentially oriented indentation and the proximal marker comprising a tapered section and a protruding ridge operatively associated with the indentation thereby allowing rotational movement and limiting longitudinal movement therebetween, the filter having a diameter for insertion and a diameter for deployment; and d) a retrieval catheter having a proximal end, a distal end, an inner diameter and an outer diameter, the retrieval catheter being coaxially disposable around the guidewire and the filter.
Claim 3
Dependent Claim
16 words
The vascular filter system according to claim 1 , wherein the guidewire comprises a Nickel-Titanium alloy.
Claim 4
Dependent Claim
25 words
The vascular filter system according to claim 1 , wherein the guidewire further comprises a floppy tip connected to the distal end of the guidewire.
Claim 5
Dependent Claim
18 words
The vascular filter system according to claim 1 , wherein the proximal and distal markers comprise radiopaque material.
Claim 6
Dependent Claim
36 words
The vascular filter system according to claim 1 , wherein the inner and outer diameter of the outer member of the filter deployment and delivery system is larger at its distal end to accommodate the filter.
Claim 7
Dependent Claim
28 words
The vascular filter system according to claim 1 , wherein the filter membrane support structure comprises a plurality of struts connected to the proximal and distal basket sleeves.
Claim 8
Dependent Claim
17 words
The vascular filter system according to claim 6 , wherein the plurality of struts comprise Nickel-Titanium alloy.
Claim 9
Dependent Claim
25 words
The vascular filter system according to claim 6 , wherein the filter further comprises at least one marker band attached to at least one strut.
Claim 10
Dependent Claim
19 words
The vascular filter system according to claim 8 , wherein the at least one marker band comprises radiopaque material.
Claim 11
Dependent Claim
19 words
The vascular filter system according to claim 1 , wherein the permeable filter membrane comprises a flexible polymeric material.
Claim 12
Dependent Claim
24 words
The vascular filter system according to claim 10 , wherein the permeable filter membrane comprises openings with diameters ranging-from twenty to three hundred microns.
Claim 13
Dependent Claim
19 words
The vascular filter system according to claim 1 , wherein the proximal and distal basket sleeves comprise radiopaque material.
Claim 14
Dependent Claim
23 words
The vascular filter system according to claim 1 , wherein the filter delivery and deployment system and the retrieval catheter are over-the-wire systems.
Claim 15
Dependent Claim
24 words
The vascular filter system according to claim 1 , wherein the filter deployment and delivery system and the retrieval catheter are rapid exchange systems.
Claim 16
Dependent Claim
23 words
The vascular filter system according to claim 1 , wherein the outer diameter of the retrieval catheter is larger at its distal end.
Claim 17
Dependent Claim
32 words
The vascular filter system according to claim 1 , wherein the retrieval catheter further comprises means to retrieve the filter from the guidewire while the guidewire remains in position within the vasculature.
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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) | 2009-01-30 | 2009-08-01 | 2010-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-30 | 2013-08-01 | 2014-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-30 | 2017-08-01 | 2018-01-31 | $7700.00 | Window Closed / Lapsed |