US20020022860A1
Expired / Lapsed
US
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Expandable implant devices for filtering blood flow from atrial appendages
Assignee: Atritech Inc
•
Filing: 2001-08-17
•
Granted: —
•
Expires: 2021-08-17
Abstract
Abstract Implant devices for filtering blood flowing through the ostium of an atrial appendage have component structures one or more of which are expandable. Devices with component structures in their unexpanded state have a compact size suitable for intra-cutaneous delivery to an atrial appendage situs. The expandable component structures are expanded in situ to deploy the devices. A device may have sufficiently short axial length so that most or almost all of the device length may fit within the ostium region. An expandable component structure in the device may include a blood-permeable filter element. The device may be deployed so that this component structure covers the ostium so as to direct the blood flow to pass through the filter element. The filter elements used in the devices may have hole size distributions selected to filter out harmful-size emboli. The filter elements may be embedded in elastic material so that hole-size distributions remain substantially unaffected by expansion of the device structures. Anchors attached to a component structure engage tissue surrounding the device and maintain the devices in position. The anchors may include inflatable anchors which engage interior walls of the atrial appendage.
Inventors
- 👤 Thomas Borillo
- 👤 Dean Peterson
- 👤 Gregg Sutton
- 👤 Jeffrey Welch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:46
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/013; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12122; A61B17/12131; A61B17/12136; A61B17/12159; A61B17/12168; A61B17/12172; A61B17/0057; A61B2017/00575; A61F2002/015; A61F2002/016; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0069; A61F2230/0073; A61F2230/008
Claims Analysis
Total Claims: 59
Claim 1
Independent Claim
112 words
1 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a membrane tube having at least a first closed end wherein said first closed end comprises a blood-permeable filter; and an expandable structure disposed in said tube, said structure having a collapsed configuration and an expanded configuration, wherein said device is insertable in said appendage while said expandable structure is in said collapsed configuration, and wherein when said expandable structure is in said expanded configuration said closed end covers the ostium of said atrial appendage and portions of said membrane tube are pressed outwards against the interior walls of said atrial appendage anchoring said device therein.
Claim 2
Dependent Claim
112 words
1 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a membrane tube having at least a first closed end wherein said first closed end comprises a blood-permeable filter; and an expandable structure disposed in said tube, said structure having a collapsed configuration and an expanded configuration, wherein said device is insertable in said appendage while said expandable structure is in said collapsed configuration, and wherein when said expandable structure is in said expanded configuration said closed end covers the ostium of said atrial appendage and portions of said membrane tube are pressed outwards against the interior walls of said atrial appendage anchoring said device therein.
Claim 3
Dependent Claim
16 words
2 . The device of claim 1 wherein said membrane tube has a substantially cylindrical shape.
Claim 4
Dependent Claim
16 words
3 . The device of claim 1 wherein said membrane tube has a second closed end.
Claim 5
Dependent Claim
16 words
4 . The device of claim 3 wherein said second closed end comprises a blood-permeable filter.
Claim 6
Dependent Claim
13 words
5 . The device of claim 1 wherein said expandable structure is self-expanding.
Claim 7
Dependent Claim
26 words
6 . The device of claim 1 wherein said expandable structure expands from said collapsed configuration to said expanded configuration by means of an inflatable balloon.
Claim 8
Dependent Claim
22 words
7 . The device of claim 6 wherein said first closed end further comprises a self-sealing opening for withdrawing said inflatable balloon.
Claim 9
Dependent Claim
15 words
8 . The device of claim 7 wherein said self-sealing opening comprises an elastic ring.
Claim 10
Dependent Claim
15 words
9 . The device of claim 7 wherein said self-sealing opening comprises overlapping membrane flaps.
Claim 11
Dependent Claim
14 words
10 . The device of claim 1 wherein said membrane tube comprises elastomeric material.
Claim 12
Dependent Claim
14 words
11 . The device of claim 1 wherein said membrane tube comprises braided material.
Claim 13
Dependent Claim
14 words
12 . The device of claim 1 wherein said membrane tube comprises woven material.
Claim 14
Dependent Claim
61 words
13 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device comprising a membrane tube having at least a first closed end wherein said first closed end comprises a blood-permeable filter; inserting said device in said appendage; positioning said closed end to cover said ostium; and anchoring said device in said atrial appendage.
Claim 15
Dependent Claim
61 words
13 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device comprising a membrane tube having at least a first closed end wherein said first closed end comprises a blood-permeable filter; inserting said device in said appendage; positioning said closed end to cover said ostium; and anchoring said device in said atrial appendage.
Claim 16
Dependent Claim
25 words
14 . The method of claim 13 wherein said anchoring comprises pressing sides of said tube outward against the interior walls of said atrial appendage.
Claim 17
Dependent Claim
59 words
15 . The method of claim 13 wherein said providing a device further comprises disposing an expandable structure in said membrane tube, wherein said inserting further comprises placing said device in said atrial appendage while said expandable structure is in a collapsed configuration, and wherein said positioning and said anchoring comprise expanding said expandable structure to an expanded configuration.
Claim 18
Dependent Claim
15 words
16 . The method of claim 15 wherein said expanding comprises using an inflatable balloon.
Claim 19
Dependent Claim
27 words
17 . The method of claim 16 further comprising deflating and withdrawing said balloon from said atrial appendage after said device is anchored in said atrial appendage.
Claim 20
Dependent Claim
62 words
18 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a cover comprising: a filter element having a predetermined size; and an expandable membrane attached to said filter element; and an expandable structure for deploying said cover, wherein said expandable membrane stretches as said cover is deployed and allows said predetermined size to remain substantially unchanged.
Claim 21
Dependent Claim
62 words
18 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a cover comprising: a filter element having a predetermined size; and an expandable membrane attached to said filter element; and an expandable structure for deploying said cover, wherein said expandable membrane stretches as said cover is deployed and allows said predetermined size to remain substantially unchanged.
Claim 22
Dependent Claim
18 words
19 . The device of claim 18 wherein said filter element comprises holes substantially impervious to harmful-size emboli.
Claim 23
Dependent Claim
23 words
20 . The filter of claim 18 wherein said filter element is made of material which is less elastic than said expandable membrane
Claim 24
Dependent Claim
70 words
21 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a cover comprising an expandable membrane attached to a filter element having a predetermined size; providing an expandable structure to deploy said cover across said ostium; and positioning said cover across said ostium using said expandable structure, wherein said positioning comprises stretching said expandable membrane such that said predetermined size is substantially unchanged.
Claim 25
Dependent Claim
70 words
21 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a cover comprising an expandable membrane attached to a filter element having a predetermined size; providing an expandable structure to deploy said cover across said ostium; and positioning said cover across said ostium using said expandable structure, wherein said positioning comprises stretching said expandable membrane such that said predetermined size is substantially unchanged.
Claim 26
Dependent Claim
78 words
22 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: an expandable structure for covering said ostium; and anchors disposed on the outer periphery of said expandable, wherein expandable structure has an axial length less than about the combined lengths of said ostium and a neck region of said atrial appendage leading to said ostium, wherein said expandable structure comprises a blood-permeable filter, and wherein said anchors engage surrounding ostium wall tissue.
Claim 27
Dependent Claim
78 words
22 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: an expandable structure for covering said ostium; and anchors disposed on the outer periphery of said expandable, wherein expandable structure has an axial length less than about the combined lengths of said ostium and a neck region of said atrial appendage leading to said ostium, wherein said expandable structure comprises a blood-permeable filter, and wherein said anchors engage surrounding ostium wall tissue.
Claim 28
Dependent Claim
13 words
23 . The device of claim 22 wherein said expandable structure is self-expanding.
Claim 29
Dependent Claim
17 words
24 . The device of claim 22 wherein said expandable structure expands in response to externally-initiated means.
Claim 30
Dependent Claim
15 words
25 . The device of claim 24 wherein said externally-initiated means comprises an inflatable balloon.
Claim 31
Dependent Claim
20 words
26 . The device of claim 22 wherein said blood-permeable filter comprises holes that are substantially impervious to harmful-size emboli.
Claim 32
Dependent Claim
75 words
27 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing an expandable structure comprising a blood-permeable filter, said expandable structure having an axial length less than about the length of an ostium; providing anchors attached to said expandable structure; disposing said expandable structure within said ostium; positioning said expandable structure to cover said ostium; and expanding said expandable structure so that said anchors engage surrounding ostium wall tissue.
Claim 33
Dependent Claim
75 words
27 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing an expandable structure comprising a blood-permeable filter, said expandable structure having an axial length less than about the length of an ostium; providing anchors attached to said expandable structure; disposing said expandable structure within said ostium; positioning said expandable structure to cover said ostium; and expanding said expandable structure so that said anchors engage surrounding ostium wall tissue.
Claim 34
Dependent Claim
18 words
28 . The method of claim 27 wherein said providing an expandable structure comprises providing a self-expanding structure.
Claim 35
Dependent Claim
31 words
29 . The method of claim 27 wherein said providing an expandable structure further comprises providing externally-initiated means to expand said expandable structure, and wherein said expanding comprises initiating said means.
Claim 36
Dependent Claim
26 words
30 . The method of claim 29 wherein said providing externally-initiated means comprises providing an inflatable balloon, and wherein said initiating comprises inflating said inflatable balloon.
Claim 37
Dependent Claim
23 words
31 . The method of claim 30 further comprising deflating and withdrawing said inflatable balloon after said anchors engage surrounding ostium wall tissue.
Claim 38
Dependent Claim
36 words
32 . The method of claim 27 wherein said positioning said expandable structure to cover said ostium comprises positioning said expandable structure to direct substantially all blood flow through said ostium to pass through said filter.
Claim 39
Dependent Claim
76 words
33 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a first structure comprising a blood-permeable filter element; and a second structure attached to said first structure, said rear structure comprising at least one inflatable anchor set, wherein said first structure is deployed across said ostium, and wherein said inflatable anchor set when inflated engages interior wall tissue of said atrial appendage to secure said device in its deployed position.
Claim 40
Dependent Claim
76 words
33 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a first structure comprising a blood-permeable filter element; and a second structure attached to said first structure, said rear structure comprising at least one inflatable anchor set, wherein said first structure is deployed across said ostium, and wherein said inflatable anchor set when inflated engages interior wall tissue of said atrial appendage to secure said device in its deployed position.
Claim 41
Dependent Claim
35 words
34 . The device of claim 33 wherein said second structure comprises an axial portion, wherein said at least one inflatable anchor set comprises anchors attached to said axial portion along a radial circumference thereof.
Claim 42
Dependent Claim
35 words
35 . The device of claim 33 wherein said second structure comprises an axial portion, wherein said at least one inflatable anchor set comprises anchors attached to said axial portion along an axial length thereof.
Claim 43
Dependent Claim
15 words
36 . The device of claim 33 wherein said first structure comprises an inflatable structure.
Claim 44
Dependent Claim
18 words
37 . The device of claim 33 wherein said filter element comprises holes substantially impervious to harmful-size emboli.
Claim 45
Dependent Claim
80 words
38 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device comprising: a first structure comprising a blood-permeable filter element; and a second structure attached to said first structure, said second structure comprising at least one inflatable anchor set; positioning said first structure to cover said ostium; disposing said second structure interior to said atrial appendage; and inflating said anchor set expanding so that said anchors engage surrounding atrial appendage wall tissue.
Claim 46
Dependent Claim
80 words
38 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device comprising: a first structure comprising a blood-permeable filter element; and a second structure attached to said first structure, said second structure comprising at least one inflatable anchor set; positioning said first structure to cover said ostium; disposing said second structure interior to said atrial appendage; and inflating said anchor set expanding so that said anchors engage surrounding atrial appendage wall tissue.
Claim 47
Dependent Claim
22 words
39 . The method of claim 38 wherein providing an implant device further comprises providing said first structure comprising an inflatable structure.
Claim 48
Dependent Claim
91 words
40 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: an expandable structure comprising: a first portion having a blood-permeable filter element; and a second portion having a cylindrical shape; and anchors disposed on at least part of the exterior surface of said second portion, wherein when said device is deployed in about the vicinity of said ostium by expanding said expandable structure said first portion covers said ostium to direct said blood flow through said filter element and said anchors engage surrounding wall tissue.
Claim 49
Dependent Claim
91 words
40 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: an expandable structure comprising: a first portion having a blood-permeable filter element; and a second portion having a cylindrical shape; and anchors disposed on at least part of the exterior surface of said second portion, wherein when said device is deployed in about the vicinity of said ostium by expanding said expandable structure said first portion covers said ostium to direct said blood flow through said filter element and said anchors engage surrounding wall tissue.
Claim 50
Dependent Claim
19 words
41 . The device of claim 40 wherein said filter element comprises holes substantially impervious to filter harmful-size emboli.
Claim 51
Dependent Claim
19 words
42 . The device of claim 40 wherein said second portion further comprises a substantially constant diameter cylindrical structure.
Claim 52
Dependent Claim
17 words
43 . The device of claim 40 wherein said second portion further comprises a flared-diameter cylindrical structure.
Claim 53
Dependent Claim
13 words
44 . The device of claim 40 wherein said expandable structure is self-expanding.
Claim 54
Dependent Claim
13 words
45 . The device of claim 40 wherein said expandable structure is balloon-expandable.
Claim 55
Dependent Claim
27 words
46 . The device of claim 40 wherein said expandable structure has elastic deformation properties causing said expandable structure to recoil in size from its expanded size.
Claim 56
Dependent Claim
32 words
47 . The device of claim 46 wherein said recoil in size causes said anchors that have engaged surrounding wall tissue to pull back and draw said walls closer to said device.
Claim 57
Dependent Claim
94 words
48 . A method for filtering blood flow through the ostium of an atrial appendage, comprising: providing a device comprising: an expandable structure, said expandable structure comprising: a first portion having a blood-permeable filter element; and a second portion having a cylindrical shape; and anchors disposed on at least part of the exterior surface of said second portion; and deploying said device in about the vicinity of said ostium wherein said deploying comprises: positioning said first portion to cover said ostium; and expanding said expandable structure so that said anchors engage surrounding wall tissue.
Claim 58
Dependent Claim
94 words
48 . A method for filtering blood flow through the ostium of an atrial appendage, comprising: providing a device comprising: an expandable structure, said expandable structure comprising: a first portion having a blood-permeable filter element; and a second portion having a cylindrical shape; and anchors disposed on at least part of the exterior surface of said second portion; and deploying said device in about the vicinity of said ostium wherein said deploying comprises: positioning said first portion to cover said ostium; and expanding said expandable structure so that said anchors engage surrounding wall tissue.
Claim 59
Dependent Claim
55 words
49 . The method of claim 48 wherein said providing a device further comprises providing said expandable structure which recoils in size from its expanded size, and wherein said expanding further comprises expanding and recoiling said expandable structure so that said anchors engage surrounding wall tissue and pull back drawing said walls toward said device.
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