US6989019B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and device for filtering body fluid
Assignee: Ev3 Inc
•
Filing: 2002-01-18
•
Granted: 2006-01-24
•
Expires: 2022-01-18
Abstract
Abstract Medical devices for filtering fluids flowing through a lumen and a method of forming medical devices. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site.
Inventors
- 👤 Rudy Mazzocchi
- 👤 Timothy Claude
- 👤 James Segermark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:43
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/0057; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61B17/12168; A61B17/12172; A61B17/12177; A61B17/22; A61B17/221; A61F; A61F2/00; A61F2/01; A61F2/0105; B; B21; B21F; B21F45/00; B21F45/008; A61B2017/00526; A61B2017/00575; A61B2017/00592; A61B2017/00601; A61B2017/0061; A61B2017/00623; A61F2/011; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067; A61F2230/0069; A61F2230/0073; A61F2230/0078; A61F2230/008
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
141 words
A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising: a tubular sheath having a lumen; a guidewire; and a filter element carried on a distal portion of the guidewire such that the filter element is advanced through the lumen of the anatomical structure by advancing the guidewire and is retracted through the lumen of the anatomical structure by retracting the guidewire, the filter element having pores and having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the sheath to an expanded configuration when the filter element is unrestrained, the filter element in the expanded configuration having a proximally facing opening which is larger than the pores, the guidewire extending to at least the distal end of the filter element.
Claim 2
Independent Claim
141 words
A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising: a tubular sheath having a lumen; a guidewire; and a filter element carried on a distal portion of the guidewire such that the filter element is advanced through the lumen of the anatomical structure by advancing the guidewire and is retracted through the lumen of the anatomical structure by retracting the guidewire, the filter element having pores and having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the sheath to an expanded configuration when the filter element is unrestrained, the filter element in the expanded configuration having a proximally facing opening which is larger than the pores, the guidewire extending to at least the distal end of the filter element.
Claim 3
Dependent Claim
11 words
The device of claim 1 wherein the filter element is self-expandable.
Claim 4
Dependent Claim
21 words
The device of claim 1 further comprising means for expanding the filter element from the collapsed configuration to the expanded configuration.
Claim 5
Dependent Claim
18 words
The device of claim 3 wherein the means for expanding comprises the filter element being comprised of nitinol.
Claim 6
Dependent Claim
21 words
The device of claim 1 wherein the filter element is attached to the guidewire at a distal region of the guidewire.
Claim 7
Dependent Claim
23 words
The device of claim 1 wherein the distal end of the filter element is connected to a distal band which encircles the guidewire.
Claim 8
Dependent Claim
18 words
The device of claim 6 wherein the distal band is connected in a fixed position on the guidewire.
Claim 9
Dependent Claim
23 words
The device of claim 6 wherein the proximal end of the filter element is connected to a proximal band which encircles the guidewire.
Claim 10
Dependent Claim
22 words
The device of claim 8 wherein one of the proximal and distal bands is connected in a fixed position on the guidewire.
Claim 11
Dependent Claim
15 words
The device of claim 8 wherein the proximal band is slidably disposed about the guidewire.
Claim 12
Dependent Claim
56 words
The device of claim 8 wherein when the filter element is in the collapsed configuration the distal and proximal bands are spaced apart a first distance and when the filter element is in the expanded configuration the proximal and distal bands are spaced apart a second distance, the first distance being greater than the second distance.
Claim 13
Dependent Claim
35 words
The device of claim 1 wherein when the filter element is in the expanded configuration a proximal portion of the filter element is of sufficient size and shape to engage the wall of the vessel.
Claim 14
Dependent Claim
32 words
The device of claim 12 wherein the filter element has a shape in the expanded configuration which decreases in size from the proximal portion to the distal end of the filter element.
Claim 15
Dependent Claim
13 words
The device of claim 1 wherein the filter element comprises a metal mesh.
Claim 16
Dependent Claim
11 words
The device of claim 14 wherein the filter element comprises nitinol.
Claim 17
Dependent Claim
22 words
The device of claim 1 wherein the guidewire includes a flexible portion extending distally of the distal end of the filter element.
Claim 18
Dependent Claim
12 words
The device of claim 1 wherein the guidewire comprises a solid material.
Claim 19
Dependent Claim
10 words
The device of claim 1 wherein the guidewire comprises metal.
Claim 20
Dependent Claim
12 words
The device of claim 1 wherein the guidewire comprises a tapered portion.
Claim 21
Independent Claim
225 words
A method of filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising: providing a tubular sheath having distal and proximal ends and a lumen; providing a guidewire including a filter element carried on a distal portion of the guidewire, the filter element having pores and having a distal end and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the sheath to an expanded configuration when the filter element is unrestrained, the filter element having a proximally facing opening which is larger than the pores when the filter element is in the expanded configuration, the guidewire extending to at least the distal end of the filter element; introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration within the lumen of the tubular sheath; advancing the guidewire through the lumen of the anatomical structure until the filter element is positioned at a desired location; removing restraint on the filter element to expand the filter element to its expanded configuration; filtering fluid flowing through the lumen of the anatomical structure into the proximally facing opening with the filter element; substantially closing the proximally facing opening to the filter element; and removing the guidewire and filter element from the lumen of the anatomical structure.
Claim 22
Independent Claim
225 words
A method of filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising: providing a tubular sheath having distal and proximal ends and a lumen; providing a guidewire including a filter element carried on a distal portion of the guidewire, the filter element having pores and having a distal end and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the sheath to an expanded configuration when the filter element is unrestrained, the filter element having a proximally facing opening which is larger than the pores when the filter element is in the expanded configuration, the guidewire extending to at least the distal end of the filter element; introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration within the lumen of the tubular sheath; advancing the guidewire through the lumen of the anatomical structure until the filter element is positioned at a desired location; removing restraint on the filter element to expand the filter element to its expanded configuration; filtering fluid flowing through the lumen of the anatomical structure into the proximally facing opening with the filter element; substantially closing the proximally facing opening to the filter element; and removing the guidewire and filter element from the lumen of the anatomical structure.
Claim 23
Dependent Claim
19 words
The method of claim 20 wherein in the step of providing a guidewire the guidewire comprises a solid material.
Claim 24
Dependent Claim
17 words
The method of claim 20 wherein in the step of providing a guidewire the guidewire comprises metal.
Claim 25
Dependent Claim
19 words
The method of claim 20 wherein in the step of providing a guidewire the guidewire comprises a tapered portion.
Claim 26
Dependent Claim
18 words
The method of claim 20 wherein in the step of providing a guidewire the filter element is self-expandable.
Claim 27
Independent Claim
229 words
A method of filtering emboli from fluid flowing through a lumen defined by the wall of an anatomical structure comprising: providing a tubular sheath having distal and proximal ends and a lumen; providing a guidewire including a filter element carried on a distal portion of the guidewire, the filter element having pores and having a distal end and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the tubular sheath to an expanded configuration when the filter element is unrestrained, the filter element having a proximally facing opening in the expanded configuration which is larger than the pores, the guidewire extending to at least the distal end of the filter element; introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration in the lumen of the tubular sheath; advancing the guidewire through the lumen of the anatomical structure until the filter element is positioned at a desired location; removing restraint on the filter element to expand the filter element to its expanded configuration; filtering emboli from fluid flowing through the lumen of the anatomical structure with the filter element; at least partially closing the proximally facing opening; and removing the guidewire and filter element from the lumen of the anatomical structure after the proximally facing opening has been at least partially closed.
Claim 28
Independent Claim
229 words
A method of filtering emboli from fluid flowing through a lumen defined by the wall of an anatomical structure comprising: providing a tubular sheath having distal and proximal ends and a lumen; providing a guidewire including a filter element carried on a distal portion of the guidewire, the filter element having pores and having a distal end and being expandable from a collapsed configuration when the filter element is restrained in the lumen of the tubular sheath to an expanded configuration when the filter element is unrestrained, the filter element having a proximally facing opening in the expanded configuration which is larger than the pores, the guidewire extending to at least the distal end of the filter element; introducing the guidewire into the lumen of the anatomical structure while the filter element is restrained in the collapsed configuration in the lumen of the tubular sheath; advancing the guidewire through the lumen of the anatomical structure until the filter element is positioned at a desired location; removing restraint on the filter element to expand the filter element to its expanded configuration; filtering emboli from fluid flowing through the lumen of the anatomical structure with the filter element; at least partially closing the proximally facing opening; and removing the guidewire and filter element from the lumen of the anatomical structure after the proximally facing opening has been at least partially closed.
Claim 29
Dependent Claim
19 words
The method of claim 25 wherein in the step of providing a guidewire the guidewire comprises a solid material.
Claim 30
Dependent Claim
17 words
The method of claim 25 wherein in the step of providing a guidewire the guidewire comprises metal.
Claim 31
Dependent Claim
19 words
The method of claim 25 wherein in the step of providing a guidewire the guidewire comprises a tapered portion.
Claim 32
Dependent Claim
18 words
The method of claim 25 wherein in the step of providing a guidewire the filter element is self-expandable.
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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) | 2009-01-23 | 2009-07-25 | 2010-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-01-23 | 2013-07-25 | 2014-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-01-23 | 2017-07-25 | 2018-01-24 | $7700.00 | Window Closed / Lapsed |