US20020116024A1
Expired / Lapsed
US
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Blood clot filtering system
Assignee: Uresil Corp
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Filing: 2001-02-20
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Granted: —
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Expires: 2021-02-20
Abstract
Abstract A blood clot filtering system including an anchor which is permanently affixed in a blood vessel, and a filter which is removably attached to the anchor.
Inventors
- 👤 Mark Goldberg
- 👤 Ron Mallick
- 👤 Lev Melinyshyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/0105; A61F2/0103; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B2017/1205; A61F2/82; A61F2/848; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0067; A61F2230/0073; A61F2230/008; A61F2230/0086; A61F2230/0089
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
31 words
1 . A blood clot filtering system comprising: an anchor including means for permanently emplacing the anchor in a blood vessel; and a blood clot filter removably attached to the anchor.
Claim 2
Dependent Claim
31 words
1 . A blood clot filtering system comprising: an anchor including means for permanently emplacing the anchor in a blood vessel; and a blood clot filter removably attached to the anchor.
Claim 3
Dependent Claim
17 words
2 . The blood clot filtering system of claim 1 in which the anchor is radially self-expanding.
Claim 4
Dependent Claim
44 words
3 . The blood clot filtering system of claim 2 in which the anchor is made of a metal spring wire material bent into a close zig-zag formation, with alternating zig and zag legs meeting at sharp angles at their distal and proximal vertices.
Claim 5
Dependent Claim
21 words
4 . The blood clot filtering system of claim 3 in which there are 6 - 18 zig and zag legs.
Claim 6
Dependent Claim
23 words
5 . The blood clot filtering system of claim 3 in which the anchor is made of a series of separate wire segments.
Claim 7
Dependent Claim
27 words
6 . The blood clot filtering system of claim 3 in which the wire spring material is chosen from the group consisting of stainless steel and nitiniol.
Claim 8
Dependent Claim
21 words
7 . The blood clot filtering system of claim 3 in which spring hinges are formed at each of the vertices.
Claim 9
Dependent Claim
20 words
8 . The blood clot filtering system of claim 7 in which the spring hinges are offset from each other.
Claim 10
Dependent Claim
35 words
9 . The blood clot filtering system of claim 3 in which at least two hooks are provided respectively at at least two distal vertices space equidistantly on a circle defined by the distal vertices.
Claim 11
Dependent Claim
35 words
10 . The blood clot filtering system of claim 5 in which hooks are provided at at least two distal vertices and the hooks are formed from protruding end portions of the separate wire segments.
Claim 12
Dependent Claim
26 words
11 . The blood clot filtering system of claim 1 in which the blood clot filter includes two stages which cooperate to provide enhanced clot catching.
Claim 13
Dependent Claim
31 words
12 . The blood clot filtering system of claim 11 in which the first stage comprises a series of distally projecting legs evenly spaced about the longitudinal axis of the system.
Claim 14
Dependent Claim
22 words
13 . The blood clot filtering system of claim 12 in which three or more evenly spaced distally projecting legs are provided.
Claim 15
Dependent Claim
38 words
14 . The blood clot filtering system of claim 12 in which the distally projecting legs are made of a spring-like material that gives each leg rigidity along its longitudinal axis while permitting each leg to flex laterally.
Claim 16
Dependent Claim
41 words
15 . The blood clot filtering system of claim 14 in which the distally projecting legs, in their fully open, non-in vivo position, are at an angle ranging from about 2° to about 22° to the longitudinal axis of the system.
Claim 17
Dependent Claim
37 words
16 . The blood clot filtering system of claim 14 in which the distally projecting legs, in their fully open, non-in vivo position, are at an angle of about 120 to the longitudinal axis of the system.
Claim 18
Dependent Claim
32 words
17 . The blood clot filtering system of claim 14 in which the distally projecting legs are made from stainless steel wire having a diameter of about 0.008 inch to 0.012 inch.
Claim 19
Dependent Claim
25 words
18 . The blood clot filtering system of claim 12 in which the first stage is also provided with a series of flexible filamentous tethers.
Claim 20
Dependent Claim
27 words
19 . The blood clot filtering system of claim 18 in which the flexible filamentous tethers cooperate with the distally projecting legs to aid in catching clots.
Claim 21
Dependent Claim
23 words
20 . The blood clot filtering system of claim 18 in which the tethers are located between adjacent pairs of distally extending legs.
Claim 22
Dependent Claim
32 words
21 . The blood clot filtering system of claim 18 in which the tethers are made of a material chosen from the group consisting of nitinol, stainless steel, and synthetic filamentous materials.
Claim 23
Dependent Claim
28 words
22 . The blood clot filtering system of claim 18 in which the tethers are flat are made from nitinol, and have a width of about 0.005 inch.
Claim 24
Dependent Claim
29 words
23 . The blood clot filtering system of claim 18 in which the tethers extend between the filter and the anchor to removably attach the filter to the anchor.
Claim 25
Dependent Claim
33 words
24 . The blood clot filtering system of claim 11 in which the second stage comprises a series of generally radially projecting legs generally evenly spaced about the longitudinal axis of the system.
Claim 26
Dependent Claim
43 words
25 . The blood clot filtering system of claim 24 in which each of the second stage legs is positioned so that, in the deployed filter, it will generally bisect the space between each of the distally projecting legs and its adjacent tether.
Claim 27
Dependent Claim
23 words
26 . The blood clot filtering system of claim 24 in which about 6 to 12 radially projecting second stage legs are provided.
Claim 28
Dependent Claim
38 words
27 . The blood clot filtering system of claim 24 in which the radially projecting legs are made of a spring-like material that gives each leg rigidity along its longitudinal axis while permitting each leg to flex laterally.
Claim 29
Dependent Claim
41 words
28 . The blood clot filtering system of claim 24 in which the radially projecting legs, in their fully open, non-in vivo position, are at an angle ranging from about 50° to about 90° to the longitudinal axis of the filter.
Claim 30
Dependent Claim
37 words
29 . The blood clot filtering system of claim 24 in which the radially projecting legs, in their fully open, non-in vivo position, are at an angle of about 700 to the longitudinal axis of the filter.
Claim 31
Dependent Claim
32 words
30 . The blood clot filtering system of claim 24 in which the radially projecting legs are made from stainless steel wire having a diameter of about 0.008 inch to 0.012 inch.
Claim 32
Dependent Claim
21 words
31 . The blood clot filtering system of claim 24 in which the radially projecting legs are made from round wire.
Claim 33
Dependent Claim
28 words
32 . The blood clot filtering system of claim 1 in which the surfaces of the anchor are coated with a surface modifier for reducing or preventing endothelializtion.
Claim 34
Dependent Claim
25 words
33 . The blood clot filtering system of claim 32 in which the surface modifier is chosen from the group consisting of rapamycin and paclitaxil.
Claim 35
Dependent Claim
30 words
34 . The blood clot filtering system of claim 18 in which the filter includes means for removably retaining at least one end of each of the flexible filamentous tethers.
Claim 36
Dependent Claim
19 words
35 . The blood clot filtering system of claim 34 in which the retaining means comprises a spring-loaded jaw.
Claim 37
Dependent Claim
63 words
36 . The blood clot filtering system of claim 35 in which one end of each tether is fixed to the jaw, and the opposite end passes through a proximal vertex of the anchor and back to the jaw where it is removably held so that, when the tether end is released from the jaw, the filter may be detached from the anchor.
Claim 38
Dependent Claim
91 words
37 . The blood clot filtering system of claim 35 in which the spring-loaded jaw includes a conical cavity and a conical member shaped and sized to seat displaceably therein under a spring force provided by the jaw, with at least a portion of the outer surface of the conical member abutting at least a portion of the inner surface of the conical cavity, whereby at least one end of each of the flexible filamentous tethers is removably retained between the abutting surfaces of the conical cavity and the conical member.
Claim 39
Dependent Claim
52 words
38 . The blood clot filtering system of claim 37 in which one end of each of the flexible filamentous tethers is removably retained between the abutting surfaces of the conical cavity and the conical member and the other end of each of the flexible filamentous tethers is fixed to the jaw.
Claim 40
Dependent Claim
55 words
39 . The blood clot filtering system of claim 36 in which the anchor is made of a metal spring wire material bent into a close zig-zag formation, with alternating zig and zag legs meeting at sharp angles at their distal and proximal vertices and the tethers pass through selected ones of the proximal vertices.
Claim 41
Dependent Claim
31 words
40 . The blood clot filtering system of claim 39 in which spring hinges are formed at the vertices and the tethers pass through the spring hinges at the proximal vertices.
Claim 42
Dependent Claim
26 words
41 . The blood clot filtering system of claim 35 in which movable abutting surfaces of the jaw are coated with a material which minimizes sticking.
Claim 43
Dependent Claim
24 words
42 . The blood clot filtering system of claim 40 in which the tethers each pass through more than one of the spring hinges.
Claim 44
Dependent Claim
25 words
43 . The blood clot filtering system of claim 41 in which the coating is chosen from the group consisting of silicone grease and polytetrafluoroethylene.
Claim 45
Dependent Claim
48 words
44 . A blood clot filter emplacement system comprising a blood clot filter system having an anchor with means for permanently emplacing the anchor in a blood vessel and a blood clot filter removably attached to the anchor, and means for emplacing the system in a blood vessel.
Claim 46
Dependent Claim
48 words
44 . A blood clot filter emplacement system comprising a blood clot filter system having an anchor with means for permanently emplacing the anchor in a blood vessel and a blood clot filter removably attached to the anchor, and means for emplacing the system in a blood vessel.
Claim 47
Dependent Claim
61 words
45 . The blood clot emplacement system of claim 44 in which the emplacing means includes a flexible receiving catheter for retaining the filtering system in a radially collapsed pre-loaded configuration prior to emplacement and for positioning the catheter in the desired location in a blood vessel, and means for deploying the filter system from the catheter into the blood vessel.
Claim 48
Dependent Claim
70 words
46 . A blood clot filter removal system for use with a blood clot filtering system, as in claim 36 , which has previously been emplaced in a blood vessel, comprising means for first unseating the conical member from the conical cavity of the jaw, thereby permitting at least one end of each of the tethers to be released from the jaw, and then withdrawing the filter from the vessel.
Claim 49
Dependent Claim
49 words
47 . The blood clot filtering system of claim 46 in which the means for unseating comprises a hook associated with the conical member of the jaw, means for snaring the hook and means for restraining the jaw while the hook is pulled upwardly to unseat the conical member.
Claim 50
Dependent Claim
32 words
48 . The blood clot filter removal system of claim 46 including umbrella means for deploying during removal of the filter to capture any clots that are freed during the removal process.
Claim 51
Dependent Claim
128 words
49 . A method for emplacing a radially compressible blood clot filter in a blood vessel to provide either permanent or temporary protection from emboli comprising: providing a blood clot filtering system including an anchor with means for permanently emplacing the anchor in the blood vessel and a blood clot filter removably attached to the anchor by flexible tethers; radially collapsing the blood clot filtering system, deploying the system in the vessel at the desire location with the anchor permanently emplaced, and permitting the system to expand radially in the vessel; and if and when it is desired to remove the filter, detaching the filter from the anchor and removing the filter from the anchor by passing it up through the blood vessel and out of the body.
Claim 52
Dependent Claim
128 words
49 . A method for emplacing a radially compressible blood clot filter in a blood vessel to provide either permanent or temporary protection from emboli comprising: providing a blood clot filtering system including an anchor with means for permanently emplacing the anchor in the blood vessel and a blood clot filter removably attached to the anchor by flexible tethers; radially collapsing the blood clot filtering system, deploying the system in the vessel at the desire location with the anchor permanently emplaced, and permitting the system to expand radially in the vessel; and if and when it is desired to remove the filter, detaching the filter from the anchor and removing the filter from the anchor by passing it up through the blood vessel and out of the body.
References Cited (Backward Citations)
No citation records indexed.
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