US20030057156A1 — Atrial filter implants

Claim 1

Independent Claim 91 words

1 . A device for filtering blood flow through a body aperture, comprising: a cover comprising a filter, said cover disposed on a multiplicity of tines extending radially outward from a device axis; an anchoring structure comprising a plurality of anchoring tines, said plurality of tines extending radially outward from said axis; and a connecting structure along said axis joining said cover and said anchoring structure, wherein said device has a substantially H-shaped cross-section, and wherein said cover and said anchoring structure are placed on opposite sides of said body aperture.

Claim 2

Dependent Claim 91 words

1 . A device for filtering blood flow through a body aperture, comprising: a cover comprising a filter, said cover disposed on a multiplicity of tines extending radially outward from a device axis; an anchoring structure comprising a plurality of anchoring tines, said plurality of tines extending radially outward from said axis; and a connecting structure along said axis joining said cover and said anchoring structure, wherein said device has a substantially H-shaped cross-section, and wherein said cover and said anchoring structure are placed on opposite sides of said body aperture.

Claim 3

Dependent Claim 49 words

2 . The device of claim 1 wherein said tines are biased so that said multiplicity of tines press said cover against body tissue surrounding said aperture, and said plurality of anchoring tines are biased to press against body tissue surrounding said aperture from the side opposite said cover.

Claim 4

Dependent Claim 14 words

3 . The device of claim 1 wherein said filter comprises a blood-permeable filter.

Claim 5

Dependent Claim 30 words

4 . The device of claim 3 wherein said blood-permeable filter comprises material selected from the group of fluoropolymers, silicone, urethane, metal fibers, polymer fibers, polyester fabric, and combinations thereof.

Claim 6

Dependent Claim 19 words

5 . The device of claim 1 wherein said tines can be folded substantially parallel to said device axis.

Claim 7

Dependent Claim 28 words

6 . The device of claim 1 wherein said tines comprise elastic material selected from the group of metals, plastics, polymers, metal alloys, shape-memory alloys, and combinations thereof.

Claim 8

Dependent Claim 12 words

7 . The device of claim 6 wherein said tines comprise nitinol.

Claim 9

Dependent Claim 21 words

8 . The device of claim 1 wherein said tines and said connecting structure are fabricated from a solid tubular preform.

Claim 10

Dependent Claim 17 words

9 . The device of claim 8 wherein said solid tubular preform comprises a shape-memory alloy tube.

Claim 11

Dependent Claim 24 words

10 . The device of claim 1 wherein said anchoring structure provides interference fit with a body cavity on one side of said aperture.

Claim 12

Dependent Claim 25 words

11 . The device of claim 10 wherein said anchoring tines are shaped to present substantially flat surfaces for contact with said body cavity walls.

Claim 13

Dependent Claim 101 words

12 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device having a substantially H-shaped cross section, said device comprising a cover disposed on a multiplicity of tines extending radially from a device axis, said cover including a filter; an anchoring structure joined to said cover by a connecting structure that is along said device axis, said anchoring structure comprising a plurality of anchoring tines extending radially from said axis; inserting a portion of said device in said atrial appendage; positioning said cover and said anchoring structure on opposite sides of said ostium.

Claim 14

Dependent Claim 101 words

12 . A method for filtering blood flowing through the ostium of an atrial appendage, comprising: providing a device having a substantially H-shaped cross section, said device comprising a cover disposed on a multiplicity of tines extending radially from a device axis, said cover including a filter; an anchoring structure joined to said cover by a connecting structure that is along said device axis, said anchoring structure comprising a plurality of anchoring tines extending radially from said axis; inserting a portion of said device in said atrial appendage; positioning said cover and said anchoring structure on opposite sides of said ostium.

Claim 15

Dependent Claim 28 words

13 . The method of claim 12 wherein said positioning comprises pinching ostium tissue between said cover and said anchoring structure to direct blood flow through said filter.

Claim 16

Dependent Claim 45 words

14 . The method of claim 13 wherein said inserting further comprises folding said tines substantially parallel to said device axis; delivering said device with folded tines through a catheter tube; and expelling said device from said catheter tube to allow said tines to unfold.

Claim 17

Dependent Claim 87 words

15 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a cover comprising a filter, wherein said cover extends across said ostium; and an anchoring structure comprising a plurality of anchoring tines extending radially from a connecting structure that joins said anchoring structure to said cover, wherein said anchoring structure has a substantially V-shaped cross-section with a vertex pointing away from said cover, and said anchoring structure engages the interior walls of said atrial appendage to retain said device in position.

Claim 18

Dependent Claim 87 words

15 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a cover comprising a filter, wherein said cover extends across said ostium; and an anchoring structure comprising a plurality of anchoring tines extending radially from a connecting structure that joins said anchoring structure to said cover, wherein said anchoring structure has a substantially V-shaped cross-section with a vertex pointing away from said cover, and said anchoring structure engages the interior walls of said atrial appendage to retain said device in position.

Claim 19

Dependent Claim 33 words

16 . The device of claim 15 wherein said anchoring tines are biased so that said anchoring structure engages said interior walls with a hook-like action to resist outward movement of said device.

Claim 20

Dependent Claim 19 words

17 . The device of claim 15 wherein said anchoring tines can be folded substantially along said connecting structure.

Claim 21

Dependent Claim 29 words

18 . The device of claim 15 wherein said anchoring tines comprise elastic material selected from the group of metals, plastics, polymers, metal alloys, shape-memory alloys, and combinations thereof.

Claim 22

Dependent Claim 17 words

19 . The device of claim 18 wherein said anchoring tines comprise the shape memory alloy nitinol.

Claim 23

Dependent Claim 21 words

20 . The device of claim 15 wherein said tines and said connecting structure are fabricated from a solid tubular preform.

Claim 24

Dependent Claim 23 words

21 . The device of claim 15 wherein said cover further comprises a multiplicity of tines extending radially away from said connecting structure.

Claim 25

Dependent Claim 28 words

22 . The device of claim 21 wherein said multiplicity of tines are biased so that said tines press said cover against atrial wall tissue surrounding said ostium.

Claim 26

Dependent Claim 20 words

23 . The device of claim 21 wherein said multiplicity of tines and said anchoring structure comprise a shape-memory alloy.

Claim 27

Dependent Claim 29 words

24 . The device of claim 15 wherein said filter comprises material selected from the group of fluoropolymers, silicone, urethane, metal fibers, polymer fibers, polyester fabric, and combinations thereof.

Claim 28

Dependent Claim 90 words

25 . A device for filtering blood flow through a body aperture, comprising: a cover comprising a filter, an anchoring structure; and a connecting structure joining said cover and said anchoring structure; and a slideable recovery tube disposed on said connecting structure, wherein said cover and said anchoring structure reversibly fold along said connecting structure, and wherein said recovery tube slides to a first position to fold said cover and said anchoring structure and said recovery tube slides to a second position to unfold said cover and said anchoring structure.

Claim 29

Dependent Claim 90 words

25 . A device for filtering blood flow through a body aperture, comprising: a cover comprising a filter, an anchoring structure; and a connecting structure joining said cover and said anchoring structure; and a slideable recovery tube disposed on said connecting structure, wherein said cover and said anchoring structure reversibly fold along said connecting structure, and wherein said recovery tube slides to a first position to fold said cover and said anchoring structure and said recovery tube slides to a second position to unfold said cover and said anchoring structure.

Claim 30

Dependent Claim 34 words

26 . The device of claim 25 wherein said cover and said anchoring structure further comprise tines that radially extend from said connecting structure and that can be folded substantially along said connecting structure.

Claim 31

Dependent Claim 37 words

27 . The device of claim 26 wherein said recovery tube comprises a slot through which a folded tine unfolds and extends radially away from said connecting structure when said recovery tube slides to said second position.

Claim 32

Dependent Claim 37 words

28 . The device of claim 26 wherein said recovery tube comprises ends which press down and slide over said tines to fold them along said connecting structure when said recovery tube slides to said first position.

Claim 33

Dependent Claim 35 words

29 . The device of claim 25 wherein said recovery tube and said connecting structure further comprises detents, wherein said detents can be engaged to lock movement of said recovery tube and said connecting structure.

Claim 34

Dependent Claim 115 words

30 . A delivery system for reversible implantation of the device of claim 29 , comprising: a catheter tube in which said device fits when said recovery tube is at said first position; a first shaft slideable through said catheter tube, said first shaft having a first collet that can engage said detents to lock the movement of said connecting structure to the movement of said first shaft; a second shaft slideable through said catheter tube, said second shaft having a second collet that can engage said detents to couple the movement of said recovery tube to the movement of said second shaft; and a third shaft for moving said device through said catheter tube.

Claim 35

Dependent Claim 121 words

31 . A method for reversibly placing an implant device in a body cavity through a catheter tube, comprising: providing an implant device comprising: a tubular section; structures that can be reversibly folded along said tubular section; and a sliding tube disposed on said tubular section, wherein said sliding tube slides to a first position to fold said structures and slides to a second position to unfold said structures, and wherein said tubular section and said sliding tube further comprise detents that can be engaged to lock their movements; moving said device with said sliding tube at said first position through said catheter tube to said body cavity; and sliding said sliding tube to said second position to unfold said structures.

Claim 36

Dependent Claim 121 words

31 . A method for reversibly placing an implant device in a body cavity through a catheter tube, comprising: providing an implant device comprising: a tubular section; structures that can be reversibly folded along said tubular section; and a sliding tube disposed on said tubular section, wherein said sliding tube slides to a first position to fold said structures and slides to a second position to unfold said structures, and wherein said tubular section and said sliding tube further comprise detents that can be engaged to lock their movements; moving said device with said sliding tube at said first position through said catheter tube to said body cavity; and sliding said sliding tube to said second position to unfold said structures.

Claim 37

Dependent Claim 163 words

32 . The method of claim 31 further comprising: providing a first shaft slideable through said catheter tube, said first shaft having a first collet that can engage said detents to lock the movement of tubular section to the movement of said first shaft; providing a second shaft slideable through said catheter tube, said second shaft having a second collet that can engage said detents to couple the movement of said sliding tube to the movement of said second shaft; and providing a third shaft for moving said device through said catheter tube; using said third shaft to move said device with said tube in said first position through said catheter tube into said body cavity; using said first shaft to lock the movement of said tubular section; using said second shaft to couple the movement of said sliding tube to the movement of said second shaft; and sliding said second shaft to move said sliding tube between said first and second positions.

Claim 38

Dependent Claim 86 words

33 . A method of reversing the placement of an implant device placed in a body cavity by the method of claim 32 comprising; using said first shaft to lock movement of said tubular section; using said second shaft to couple the movement of said sliding tube to the movement of said second shaft; sliding said second shaft to move said tube to said first position; and using said third shaft to move said device with said tube in said first position into said catheter tube.

Claim 39

Dependent Claim 92 words

34 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a proximal portion; a distal portion joined with said proximal portion; and a filter disposed on said proximal portion, wherein said distal portion comprises a cylindrical braided wire structure and said proximal portion comprises a closed end of said cylindrical braided wire structure, wherein said filter is disposed on said proximal portion, and wherein said braided wire structure is shaped for an interference fit in said atrial appendage and said proximal portion extends across said ostium.

Claim 40

Dependent Claim 92 words

34 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a proximal portion; a distal portion joined with said proximal portion; and a filter disposed on said proximal portion, wherein said distal portion comprises a cylindrical braided wire structure and said proximal portion comprises a closed end of said cylindrical braided wire structure, wherein said filter is disposed on said proximal portion, and wherein said braided wire structure is shaped for an interference fit in said atrial appendage and said proximal portion extends across said ostium.

Claim 41

Dependent Claim 27 words

35 . The device of claim 34 wherein said wire braided structure is elastic and said structure can be reversibly compacted for delivery through a catheter tube.

Claim 42

Dependent Claim 24 words

36 . The device of claim 34 wherein said closed end comprises a band closing a tubular end of said cylindrical braided wire structure.

Claim 43

Dependent Claim 21 words

37 . The device of claim 35 wherein said band comprises a fixture for attaching a delivery shaft to said device.

Claim 44

Dependent Claim 35 words

38 . The device of claim 34 wherein said cylindrical braided wire structure comprises wires selected from the group of metal wires, plastic wires, polymer wires, metal alloy wires, shape-memory alloy wires, and combinations thereof.

Claim 45

Dependent Claim 16 words

39 . The device of claim 38 wherein said cylindrical braided wire structure comprises nitinol wires.

Claim 46

Dependent Claim 29 words

40 . The device of claim 34 wherein said filter comprises material selected from the group of fluoropolymers, silicone, urethane, metal fibers, polymer fibers, polyester fabric, and combinations thereof.

Claim 47

Dependent Claim 19 words

41 . The device of claim 34 wherein said filter comprises material interwoven with said cylindrical wire braid structure.

Claim 48

Dependent Claim 27 words

42 . The device of claim 41 wherein said interwoven material comprises material selected from the group of metal wires, plastic wires, polymer wires and combinations thereof.

Claim 49

Dependent Claim 29 words

43 . The device of claim 34 wherein said filter comprises material selected from the group of fluoropolymers, silicone, urethane, metal fibers, polymer fibers, polyester fabric, and combinations thereof.

Claim 50

Dependent Claim 26 words

44 . The device of claim 34 wherein said cylindrical braided wire structure further comprises a braid with interwire hole sizes substantially smaller than harmful-sized emboli.

Claim 51

Dependent Claim 36 words

45 . The device of claim 34 wherein said filter comprises a cover attached to said proximal portion, wherein said cover engages atrial wall tissue surrounding said ostium, and wherein said cover includes a filter element.

Claim 52

Dependent Claim 93 words

46 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a proximal portion; a distal portion joined with said proximal portion; and wherein said distal portion comprises a cylindrical braided wire structure and said proximal portion comprises a closed end of said cylindrical braided wire structure, wherein said braided wire structure is shaped for an interference fit in said atrial appendage and said proximal portion extends across said ostium, and wherein said braided wire structure comprises a braid with interwire hole sizes substantially smaller than harmful-sized emboli.

Claim 53

Dependent Claim 93 words

46 . A device for filtering blood flowing through the ostium of an atrial appendage, comprising: a proximal portion; a distal portion joined with said proximal portion; and wherein said distal portion comprises a cylindrical braided wire structure and said proximal portion comprises a closed end of said cylindrical braided wire structure, wherein said braided wire structure is shaped for an interference fit in said atrial appendage and said proximal portion extends across said ostium, and wherein said braided wire structure comprises a braid with interwire hole sizes substantially smaller than harmful-sized emboli.

Claim 54

Dependent Claim 27 words

47 . The device of claim 46 wherein said wire braided structure is elastic and said structure can be reversibly compacted for delivery through a catheter tube.

Claim 55

Dependent Claim 35 words

48 . The device of claim 46 wherein said cylindrical braided wire structure comprises wires selected from the group of metal wires, plastic wires, polymer wires, metal alloy wires, shape-memory alloy wires, and combinations thereof.

Claim 56

Dependent Claim 16 words

49 . The device of claim 48 wherein said cylindrical braided wire structure comprises nitinol wires.

Claim 57

Dependent Claim 44 words

50 . A method of implanting the device of claim 47 in body cavity to filter blood flow comprising: delivering said device with compacted structures through a catheter tube; and expelling said device from said catheter tube to allow said compacted structures to expand.

Atrial filter implants

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