US7220271B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Embolic filters having multiple layers and controlled pore size
Assignee: Covidien LP
•
Filing: 2003-01-30
•
Granted: 2007-05-22
•
Expires: 2023-01-30
Abstract
Abstract The invention provides a device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body comprising a filter element. The filter element is expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained. When the filter element is in the expanded configuration, the average pore size is from 30 to 300 microns and the standard deviation of the pore size is less than 20 percent of the average pore size. The filter element has two or more filtering layers, each filtering layer having pores, each filtering layer being adjacent to at least one other filtering layer, and at least one of the filtering layers being made of a self-expanding material.
Inventors
- 👤 Thomas L. Clubb
- 👤 John C. Oslund
- 👤 Richard S. Kusleika
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:10
CPC Classifications
D; D04; D04C; D04C1/00; D04C1/02; A; A61; A61F; A61F2/00; A61F2/01; A61F2/013; A61F2002/015; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0008; A61F2230/0063; A61F2230/0067; A61F2230/0073; A61F2230/008; D10; D10B; D10B2509/00; D10B2509/06
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
128 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein when the filter element is in the expanded configuration, the average pore size is from 30 to 300 microns and the standard deviation of the pore size is less than 20 percent of the average pore size, and wherein the filter element comprises two or more filtering layers, each filtering layer comprising pores, each filtering layer being adjacent to at least one other filtering layer, and at least one of the filtering layers being made of a self-expanding material.
Claim 2
Independent Claim
128 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein when the filter element is in the expanded configuration, the average pore size is from 30 to 300 microns and the standard deviation of the pore size is less than 20 percent of the average pore size, and wherein the filter element comprises two or more filtering layers, each filtering layer comprising pores, each filtering layer being adjacent to at least one other filtering layer, and at least one of the filtering layers being made of a self-expanding material.
Claim 3
Dependent Claim
16 words
A device of claim 1 , wherein each filtering layer is made of a self-expanding material.
Claim 4
Dependent Claim
26 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the average pore size is from 30 to 150 microns.
Claim 5
Dependent Claim
26 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the average pore size is from 100 to 140 microns.
Claim 6
Dependent Claim
26 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the average pore size is from 40 to 70 microns.
Claim 7
Dependent Claim
33 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the standard deviation of the pore size is less than 15 percent of the average pore size.
Claim 8
Dependent Claim
33 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the standard deviation of the pore size is less than 10 percent of the average pore size.
Claim 9
Dependent Claim
33 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the standard deviation of the pore size is less than 5 percent of the average pore size.
Claim 10
Dependent Claim
33 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the standard deviation of the pore size is less than 2 percent of the average pore size.
Claim 11
Dependent Claim
28 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the filter element has a percent open area greater than 50 percent.
Claim 12
Dependent Claim
28 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the filter element has a percent open area greater than 60 percent.
Claim 13
Dependent Claim
28 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the filter element has a percent open area greater than 70 percent.
Claim 14
Dependent Claim
28 words
A device of claim 1 , wherein when the filter element is in the expanded configuration, the filter element has a percent open area greater than 80 percent.
Claim 15
Dependent Claim
18 words
A device of claim 1 , wherein the self-expanding material has a tensile strength greater than 70,000 psi.
Claim 16
Dependent Claim
19 words
A device of claim 1 , wherein the the self-expanding material has a tensile strength greater than 100,000 psi.
Claim 17
Dependent Claim
18 words
A device of claim 1 , wherein the self-expanding material has a tensile strength greater than 200,000 psi.
Claim 18
Dependent Claim
14 words
A device of claim 1 , wherein the self-expanding material is made of metal.
Claim 19
Dependent Claim
14 words
A device of claim 1 , wherein the self-expanding material is made of nitinol.
Claim 20
Dependent Claim
27 words
A device of claim 1 , further comprising an elongate support member and wherein the filter element is carried on a portion of the elongate support member.
Claim 21
Dependent Claim
38 words
A device of claim 1 , wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening.
Claim 22
Dependent Claim
17 words
A device of claim 20 , wherein the self-expanding material comprises wires braided to form diamond-shaped pores.
Claim 23
Dependent Claim
23 words
A device of claim 1 , wherein the self-expanding material comprises a single mesh rolled back on itself to form two filtering layers.
Claim 24
Dependent Claim
38 words
A device of claim 22 , wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening.
Claim 25
Dependent Claim
23 words
A device of claim 23 , wherein the filter element comprises a drawstring tether at the proximal facing opening of the filter element.
Claim 26
Dependent Claim
17 words
A device of claim 23 , wherein the self-expanding material comprises wires braided to form diamond-shaped pores.
Claim 27
Dependent Claim
15 words
A device of claim 1 , wherein the filter element comprises two separate filtering layers.
Claim 28
Dependent Claim
38 words
A device of claim 26 , wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening.
Claim 29
Dependent Claim
17 words
A device of claim 26 , wherein the self-expanding material comprises wires braided to form diamond-shaped pores.
Claim 30
Dependent Claim
17 words
A device of claim 26 , wherein the two separate filtering layers have different average pore sizes.
Claim 31
Dependent Claim
18 words
A device of claim 26 , wherein the two separate filtering layers are not attached to each other.
Claim 32
Dependent Claim
17 words
A device of claim 26 , wherein the two separate filtering layers are attached to each other.
Claim 33
Dependent Claim
21 words
A device of claim 31 , wherein the two separate filtering layers are attached to each other by a fixed element.
Claim 34
Dependent Claim
21 words
A device of claim 31 , wherein the two separate filtering layers are attached to each other by a sliding element.
Claim 35
Dependent Claim
20 words
A device of claim 31 , wherein the two separate filtering layers are attached to each other by a tether.
Claim 36
Dependent Claim
27 words
A device of claim 26 , wherein a first filtering layer comprises wires braided to from diamond-shaped pores, and the second filtering layer comprises a coiled wire.
Claim 37
Independent Claim
120 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element having pores, said filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein the filter element comprises a single mesh rolled back on itself to form two filtering layers, wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening, and wherein the filter element comprises a drawstring tether at the proximal facing opening of the filter element.
Claim 38
Independent Claim
120 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element having pores, said filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein the filter element comprises a single mesh rolled back on itself to form two filtering layers, wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening, and wherein the filter element comprises a drawstring tether at the proximal facing opening of the filter element.
Claim 39
Dependent Claim
17 words
A device of claim 36 , wherein the filter element comprises wires braided to form diamond-shaped pores.
Claim 40
Dependent Claim
12 words
A device of claim 36 , wherein the filter element is self-expanding.
Claim 41
Independent Claim
121 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element having pores, said filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein the filter element comprises a single mesh rolled back on itself to form two filtering layers, a first one of the filtering layers forming an inner filter portion and a second one of the filtering layers forming an outer filter portion, wherein the inner filter portion is wrapped with a third filtering layer, and wherein the third filtering layer is not contiguous with the outer filter portion.
Claim 42
Independent Claim
121 words
A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body, comprising: a filter element having pores, said filter element being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, wherein the filter element comprises a single mesh rolled back on itself to form two filtering layers, a first one of the filtering layers forming an inner filter portion and a second one of the filtering layers forming an outer filter portion, wherein the inner filter portion is wrapped with a third filtering layer, and wherein the third filtering layer is not contiguous with the outer filter portion.
Claim 43
Dependent Claim
32 words
A device of claim 39 , wherein the third filtering layer is made of a material selected from the group consisting of polymer filaments, braided wire, or a polymer sheet having pores.
Claim 44
Dependent Claim
12 words
A device of claim 39 , wherein the filtering element is self-expanding.
Claim 45
Dependent Claim
38 words
A device of claim 39 , wherein the filter element has proximal and distal portions and a central portion, the filter element having a shape in the expanded configuration which defines a cavity having a proximal facing opening.
Claim 46
Dependent Claim
23 words
A device of claim 42 , wherein the filter element comprises a drawstring tether at the proximal facing opening of the filter element.
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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) | 2010-05-21 | 2010-11-20 | 2011-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2014-05-21 | 2014-11-20 | 2015-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2018-05-21 | 2018-11-20 | 2019-05-22 | $7700.00 | Window Closed / Lapsed |