US6602271B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collapsible blood filter with optimal braid geometry
Assignee: Medtronic Vascular Inc
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Filing: 2000-12-12
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Granted: 2003-08-05
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Expires: 2020-12-12
Abstract
Abstract The present invention is a collapsible blood filter for use during a vascular procedure, such as angioplasty or stent deployment. A filter made of braided filaments is located on the distal end of a delivery member, and the filter is deployed downstream of the vascular treatment site to capture emboli released during and immediately after the procedure. Optimal braid geometry of the filter ensures that captured emboli will be retained during collapse and removal of the filter following the procedure.
Inventors
- 👤 Bruce Adams
- 👤 Ahmed Malek
- 👤 Jerry R. Brightbill
- 👤 Nasser Rafiee
- 👤 Nareak Douk
- 👤 David S. Brin
- 👤 Dennis L. Brooks
- 👤 Robert D. Lashinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:42
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/013; A61F2002/015; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067; A61F2230/0073; A61F2230/008
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
103 words
A collapsible blood filter for capturing emboli during an endovascular procedure at a treatment site, the filter comprising a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration.
Claim 2
Dependent Claim
103 words
A collapsible blood filter for capturing emboli during an endovascular procedure at a treatment site, the filter comprising a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration.
Claim 3
Dependent Claim
29 words
The blood filter of claim 1 wherein at least a portion of the filter between the ends is cylindrical in shape when the filter is in the deployed configuration.
Claim 4
Dependent Claim
15 words
The blood filter of claim 1 wherein the shape of the deployed configuration is ovoid.
Claim 5
Dependent Claim
23 words
The blood filter of claim 1 wherein the deployed configuration is sized to fill a selected cross-sectional area distal to the treatment site.
Claim 6
Dependent Claim
20 words
The blood filter of claim 1 wherein at least one of the braid filaments is a wire comprising radiopaque metal.
Claim 7
Dependent Claim
129 words
A distal protection device for capturing emboli during an endovascular procedure at a treatment site, the device comprising: a delivery member having a proximal end and a distal end; and a collapsible filter adjacent the distal end of the delivery member, the filter comprising a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration.
Claim 8
Dependent Claim
129 words
A distal protection device for capturing emboli during an endovascular procedure at a treatment site, the device comprising: a delivery member having a proximal end and a distal end; and a collapsible filter adjacent the distal end of the delivery member, the filter comprising a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration.
Claim 9
Dependent Claim
33 words
The distal protection device of claim 6 further comprising: a sheath being slidingly moveable over at least part of the filter for transforming the filter between the deployed configuration and the collapsed configuration.
Claim 10
Dependent Claim
24 words
The distal protection device of claim 6 wherein the deployed configuration is sized to fill a selected cross-sectional area distal to the treatment site.
Claim 11
Dependent Claim
21 words
The distal protection device of claim 6 wherein at least one of the braid filaments is a wire comprising radiopaque metal.
Claim 12
Independent Claim
132 words
A system for treating a vascular stenosis, comprising: an elongate delivery member having proximal and distal ends; a collapsible filter mounted adjacent the distal end of the delivery member, the filter having a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies a transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration; and a vascular treatment catheter capable of being slidably disposed about the delivery member.
Claim 13
Independent Claim
132 words
A system for treating a vascular stenosis, comprising: an elongate delivery member having proximal and distal ends; a collapsible filter mounted adjacent the distal end of the delivery member, the filter having a tube formed by braided filaments that define pores, the filter having at least one inlet opening that is substantially larger than the pores, the filter having an axis and tapered ends, wherein relative movement of the ends along the axis accompanies a transformation of the filter between a collapsed configuration and a deployed configuration, and wherein the pore-defining filaments of the braided tube form a maximum included angle of about 90 degrees, as measured across the axis when the filter is in the deployed configuration; and a vascular treatment catheter capable of being slidably disposed about the delivery member.
Claim 14
Dependent Claim
38 words
A system according to claim 10 further comprising a sheath capable of being slidably disposed about the delivery member and extendable over at least a proximal portion of the filter when the filter is in the collapsed configuration.
Claim 15
Dependent Claim
17 words
A system according to claim 10 , wherein the vascular treatment catheter is a balloon angioplasty catheter.
Claim 16
Dependent Claim
17 words
A system according to claim 10 , wherein the vascular treatment catheter is a stent delivery catheter.
Claim 17
Independent Claim
90 words
A method of making a collapsible blood filter, the method comprising: braiding wire-like filaments to form a tubular filter having pores therein, the filter having an axis, a deployed diameter and two ends, the filaments intersecting at a maximum angle of about 90 degrees, as measured across the axis when the filter is at the deployed diameter; forming tapered ends on the filter by drawing the ends to a second diameter that is significantly smaller than the deployed diameter; and heat treating the filter to fix a selected shape thereof.
Claim 18
Independent Claim
90 words
A method of making a collapsible blood filter, the method comprising: braiding wire-like filaments to form a tubular filter having pores therein, the filter having an axis, a deployed diameter and two ends, the filaments intersecting at a maximum angle of about 90 degrees, as measured across the axis when the filter is at the deployed diameter; forming tapered ends on the filter by drawing the ends to a second diameter that is significantly smaller than the deployed diameter; and heat treating the filter to fix a selected shape thereof.
Claim 19
Dependent Claim
60 words
The method of making a blood filter according to claim 14 , further comprising: forming at least one inlet opening in a tapered end of the filter, the opening having a selected size and shape that is substantially larger than the pores by forcing a mandrel of the selected size and shape into a pore formed by the braided filaments.
Claim 20
Dependent Claim
34 words
The method of making a blood filter according to claim 14 , wherein the braiding step further includes braiding a distal portion of the filter body more tightly than the remainder of the body.
Claim 21
Dependent Claim
20 words
The method of making a blood filter according to claim 14 , wherein the wire-like filaments comprise shape-memory metal wires.
Claim 22
Dependent Claim
26 words
The method of making a blood filter according to claim 14 , wherein at least one of the wire-like filaments is a wire comprising radiopaque metal.
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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) | 2006-08-04 | 2007-02-03 | 2007-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-08-04 | 2011-02-03 | 2011-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-08-04 | 2015-02-03 | 2015-08-05 | $7700.00 | Window Closed / Lapsed |