Patent US6726701B2 successfully refreshed from Google Patents.
US6726701B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Embolic protection device
Assignee: Salviac Ltd
•
Filing: 2001-11-07
•
Granted: 2004-04-27
•
Expires: 2021-11-07
Abstract
Abstract A collapsible filter element for a transcatheter embolic protection device, the filter element comprises a collapsible filter body of polymeric material which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filer element. A proximal inlet portion of the filter body has one or more inlet openings sized to allow blood and embolic material enter the filter body. A distal outlet portion of the filter body has a plurality of generally circular outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body. The distal outlet portion of the filter body in the region of the outlet openings has means for reducing shear stress on blood passing through the outlet openings. The shear stress reducing means includes lead-in and lead-out radiussed portioins of the filter body leading to the outlet holes. The porosity of the distal portion of the filter body decreases towards the distal end. A blind portion extends for at least 5% of the length of the body. Preferably there are between 200 and 300 outlet opening with an average diameter of approximately 150 microns.
Inventors
- 👤 Paul Gilson
- 👤 Eamon Brady
- 👤 Michael Gilvarry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:40
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067
Claims Analysis
Total Claims: 68
Claim 1
Independent Claim
138 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the distal outlet portion of the filter body in the region of the outlet openings having stress reducing means shear stress on blood passing through the outlet openings.
Claim 2
Dependent Claim
138 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the distal outlet portion of the filter body in the region of the outlet openings having stress reducing means shear stress on blood passing through the outlet openings.
Claim 3
Dependent Claim
21 words
A filter element as claimed in claim 1 wherein the filter body includes lead-in radiussed portions leading to the outlet openings.
Claim 4
Dependent Claim
29 words
A filter element as claimed in claim 2 wherein the filter is of a polymeric material and the radiussed portions are formed by solvent polishing of the polymeric material.
Claim 5
Dependent Claim
25 words
A filter element as claimed in claim 3 wherein the overall porosity of the distal portion of the filter element is from 8% to 21%.
Claim 6
Dependent Claim
21 words
A filter element as claimed in claim 1 wherein the filter body includes lead-out radiussed portions leading from the outlet openings.
Claim 7
Dependent Claim
15 words
A filter element as claimed in claim 1 wherein the outlet openings are generally circular.
Claim 8
Dependent Claim
37 words
A filter element as claimed in claim 1 wherein the proximal inlet portion of the filter body in the region of the inlet openings is configured to reduce shear stress on blood passing through the inlet openings.
Claim 9
Dependent Claim
21 words
A filter element as claimed in claim 7 wherein the filter body includes lead-in radiussed portions leading to the inlet openings.
Claim 10
Dependent Claim
21 words
A filter element as claimed in claim 7 wherein the filter body includes lead-out raduissed portions leading from the inlet openings.
Claim 11
Dependent Claim
16 words
A filter element as claimed in claim 1 wherein the filter is of a polymeric material.
Claim 12
Dependent Claim
17 words
A filter element as claimed in claim 1 wherein the filter body defines a three dimensional matrix.
Claim 13
Dependent Claim
18 words
A filter element as claimed in claim 1 wherein the filter body is of a resilient elastomeric material.
Claim 14
Dependent Claim
17 words
A filter element as claimed in claim 1 wherein the filter body is of a polyurethane elastomer.
Claim 15
Dependent Claim
18 words
A filter element as claimed in claim 1 wherein the filter body is of a polycarbonate urethane material.
Claim 16
Dependent Claim
25 words
A filter element as claimed in claim 1 wherein the filter body is covered with a hydrophilic coating, the openings being provided in the coating.
Claim 17
Dependent Claim
27 words
A filter element as claimed in claim 1 wherein the porosity of the distal portion of the filter body decreases towards the distal end of the filter.
Claim 18
Dependent Claim
25 words
A filter element as claimed in claim 16 wherein the overall porosity of the distal portion of the filter element is from 5% to 40%.
Claim 19
Dependent Claim
26 words
A filter element as claimed in claim 16 wherein the transverse cross sectional areas at longitudinally spaced-apart locations of the distal portion are substantially the same.
Claim 20
Dependent Claim
31 words
A filter element as claimed in claim 16 wherein the distal portion is of generally conical shape having a radial dimension which decreases towards a distal end of the filter element.
Claim 21
Dependent Claim
25 words
A filter element as claimed in claim 16 wherein the distal portion includes a blind section adjacent to the distal end of the filter element.
Claim 22
Dependent Claim
25 words
A filter element as claimed in claim 20 wherein the blind portion extends longitudinally for at least 5% of the length of the distal portion.
Claim 23
Dependent Claim
25 words
A filter element as claimed in claim 20 wherein the blind portion extends longitudinally for less than 30% of the length of the distal portion.
Claim 24
Dependent Claim
28 words
A filter element as claimed in claim 16 wherein the number of outlet openings increases towards an outer edge of the distal outlet portion of the filter body.
Claim 25
Dependent Claim
27 words
A filter element as claimed in claim 1 wherein there are between 200 and 1000 outlet openings with an average diameter of between 50 and 200 microns.
Claim 26
Dependent Claim
25 words
A filter element as claimed in claim 24 wherein there are between 200 and 300 outlet openings with an average diameter of approximately 150 microns.
Claim 27
Dependent Claim
26 words
A filter element as claimed in claim 24 wherein there are at least 200 outlet openings with an average diameter of no more than 200 microns.
Claim 28
Dependent Claim
24 words
A filter element as claimed in claim 24 wherein there are less than 1000 openings with an average diameter of at least 50 microns.
Claim 29
Dependent Claim
33 words
A filter element as claimed in claim 1 wherein the openings are sized such that shear stress imparted to blood flowing through the filter body at physiological flow rates is less than 800Pa.
Claim 30
Dependent Claim
30 words
A filter element as claimed in claim 28 wherein the shear stress imparted to blood moving through the filter body at physiological flow rates is less than about 400 Pa.
Claim 31
Dependent Claim
30 words
A filter element as claimed in claim 29 wherein the shear stress imported to blood moving through the filter body at physiological flow rates is less than about 200 Pa.
Claim 32
Dependent Claim
15 words
A filter element as claimed in claim 1 wherein the openings are generally circular openings.
Claim 33
Dependent Claim
29 words
A filter element as claimed in claim 1 wherein said filter body, when in a deployed configuration includes a generally cylindrical intermediate section between said proximal and distal portions.
Claim 34
Dependent Claim
24 words
A filter element as claimed in claim 32 wherein the distal section of the filter body is generally tapered when in a deployed configuration.
Claim 35
Dependent Claim
25 words
A filter element as claimed in claim 33 wherein said distal section of said filter body comprises at least a portion of the filter element.
Claim 36
Dependent Claim
25 words
A filter element as claimed in claim 32 wherein said intermediate section of said filter body comprises at least a portion of the filter element.
Claim 37
Dependent Claim
20 words
A filter element as claimed in claim 32 wherein the intermediate section of said filter body includes a circumferential groove.
Claim 38
Dependent Claim
50 words
A filter element as claimed in claim 1 wherein said filter body, when in a deployed configuration is defined by a generally elongated shape, having an intermediate section with an axial dimension and a transverse dimension, the ratio of the axial dimension to the transverse dimension being at least 0.5.
Claim 39
Dependent Claim
23 words
A filter element as claimed in claim 37 wherein the ratio of the axial dimension to the transverse dimension is at least 1.0.
Claim 40
Dependent Claim
26 words
A filter element as claimed in claim 1 wherein the filter body includes a guidewire lumen extending co-axially of a longitudinal axis of the filter body.
Claim 41
Dependent Claim
138 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body comprising a membrane of polymeric material; wherein there are between 200 and 1000 outlet openings with an average diameter of between 50 and 200 microns.
Claim 42
Dependent Claim
138 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body comprising a membrane of polymeric material; wherein there are between 200 and 1000 outlet openings with an average diameter of between 50 and 200 microns.
Claim 43
Dependent Claim
25 words
A filter element as claimed in claim 40 wherein there are between 200 and 300 outlet openings with an average diameter of approximately 150 microns.
Claim 44
Dependent Claim
26 words
A filter element as claimed in claim 40 wherein there are at least 200 outlet openings with an average diameter of no more than 200 microns.
Claim 45
Dependent Claim
24 words
A filter element as claimed in claim 40 wherein there are less than 1000 openings with an average diameter of at least 50 microns.
Claim 46
Dependent Claim
15 words
A filter element as claimed in claim 40 wherein the openings are generally circular openings.
Claim 47
Dependent Claim
145 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body comprising a membrane of polymeric material; wherein the openings are sized such that shear stress imparted to blood flowing through the filter body at physiological flow rates is less than 800 Pa.
Claim 48
Dependent Claim
145 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body comprising a membrane of polymeric material; wherein the openings are sized such that shear stress imparted to blood flowing through the filter body at physiological flow rates is less than 800 Pa.
Claim 49
Dependent Claim
30 words
A filter element as claimed in claim 45 wherein the shear stress imparted to blood moving through the filter body at physiological flow rates is less than about 400 Pa.
Claim 50
Dependent Claim
30 words
A filter element as claimed in claim 46 wherein the shear stress imparted to blood moving through the filter body at physiological flow rates is less than about 200 Pa.
Claim 51
Dependent Claim
15 words
A filter element as claimed in claim 44 wherein the openings are generally circular openings.
Claim 52
Dependent Claim
183 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; the filter body having a longitudinal axis a proximal inlet portion, a distal outlet portion and an intermediate section extending between the proximal portion and the distal portion; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body having a guidewire lumen co-axial with the longitudinal axis; wherein in a deployed configuration the intermediate section is generally cylindrical with an axial dimension and a transverse dimension, the ratio of the axial dimension to the transverse dimension being at least 0.5.
Claim 53
Dependent Claim
183 words
A collapsible filter element for a transcatheter embolic protection device, the filter element comprising: a collapsible filter body which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element; the filter body having a longitudinal axis a proximal inlet portion, a distal outlet portion and an intermediate section extending between the proximal portion and the distal portion; a proximal inlet portion of the filter body having one or more inlet openings sized to allow blood and embolic material enter the filter body; a distal outlet portion of the filter body having a plurality of outlet openings sized to allow through-passage of blood, but to retain embolic material within the filter body; the filter body having a guidewire lumen co-axial with the longitudinal axis; wherein in a deployed configuration the intermediate section is generally cylindrical with an axial dimension and a transverse dimension, the ratio of the axial dimension to the transverse dimension being at least 0.5.
Claim 54
Dependent Claim
15 words
A filter element as claimed in claim 49 wherein the ratio is at least 1.0.
Claim 55
Dependent Claim
152 words
A transcatheter embolic protection device including: a delivery system comprising: a tubular member having a longitudinal axis, distal and proximal portions, said distal portion of the tubular member being removably advanceable into the vasculature of a patient; a medical guidewire longitudinally axially movable in said tubular member and having distal and proximal portions; and a filter element as claimed in claim 45 , the filter body having; a first collapsed, insertion and withdrawal configuration and a second expanded, deployed configuration; a proximal inlet section and a distal outlet section, said proximal inlet section including inlet openings which are operable to admit body fluid when the filter body is in the second expanded configuration; a plurality of outlet openings disposed on at least a portion of the filter element adjacent to the distal outlet section; wherein said filter body is moved between said first and second configurations by displacement of said delivery system.
Claim 56
Dependent Claim
16 words
A device of claim 51 wherein the filter body has collapsible filter frame operably coupled thereto.
Claim 57
Dependent Claim
21 words
A device as claimed in claim 52 wherein said frame comprises a plurality of support arms having proximal and distal ends.
Claim 58
Dependent Claim
16 words
A device of claim 53 wherein the arms are formed of an elastic shape memory material.
Claim 59
Dependent Claim
21 words
A device of claim 52 wherein said frame is constructed such that filter body is biased toward said second, deployed configuration.
Claim 60
Dependent Claim
17 words
A device of claim 53 wherein said inlet openings are defined at least partially by said arms.
Claim 61
Dependent Claim
29 words
A device of claim 53 wherein proximal portions of said arms extend generally outwardly and distally from said guidewire when said filter body is in said second, deployed configuration.
Claim 62
Dependent Claim
29 words
A device of claim 57 wherein distal portions of said arms extend generally outwardly and proximally from said guidewire when said filter body is in said second, deployed configuration.
Claim 63
Dependent Claim
29 words
A device of claim 51 wherein the distal portion of the tubular member further includes a pod for receiving therein the filter body when in said first, collapsed configuration.
Claim 64
Dependent Claim
25 words
A device of claim 59 wherein said filter body is urged into said first, collapsed configuration by said pod when the guidewire is moved proximally.
Claim 65
Dependent Claim
10 words
A device of claim 51 wherein said guidewire is solid.
Claim 66
Dependent Claim
17 words
A device of claim 51 wherein said filter body comprises a sleeve slidably disposed on said guidewire.
Claim 67
Dependent Claim
21 words
A device of claim 54 further comprising stops for limiting the range of longitudinal movement of the sleeve on said guidewire.
Claim 68
Dependent Claim
20 words
A device of claim 55 wherein the sleeve further comprises a guidewire member distal to the filter body tapering distally.
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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) | 2007-04-27 | 2007-10-27 | 2008-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-04-27 | 2011-10-27 | 2012-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-04-27 | 2015-10-27 | 2016-04-27 | $7700.00 | Window Closed / Lapsed |