Embolic filter

• US 20030195554A1
• Filed: 04/16/2003
• Published: 10/16/2003
• Est. Priority Date: 08/24/2001
• Status: Active Grant

• Current Assignee: Christopher T. Shen, Olin Palmer
• Original Assignee: Christopher T. Shen, Olin Palmer
• Inventors: Shen, Christopher T., Palmer, Olin
• Granted Patent: US 7,004,955 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0097 Harpoon-shaped

Abstract

An intravascular filter device for use in capturing debris which may occur as a result of an intravascular procedure. The filter device includes a proximal section, a distal section and a mid-section. The mid-section includes three rings configured in a sixteen apices alternating V-pattern. The filter device specifically embodies structure that provides enhanced radial opening and angular resistance to collapse in its expanded state. While, in its compressed state the filter device provides an extremely small compressed profile giving it the desired ability to be delivered into very small vessels of the human vasculature.

Claims

1. A filter device, comprising:

an elongate member having a first end and a second end, the second end extending exterior of the vasculature;

a body including a first section defining a first end portion, a second section defining a mid-portion, a third section defining a second end portion, the first section, the second section and the third section form a conically tapering filter, the body includes an open first end and a substantially closed second end;

the body having a longitudinal axis defined by a sidewall, the body being attached to the second end of the elongate member, the elongate member extending from the open first end in a parallel relationship with the longitudinal axis; and

the mid-portion further comprising three ring members adjacently configured end to end, each ring member having a plurality of first members in an alternating V-pattern to form sixteen apices defining each a ring proximal end and a ring distal end.

2. The device of claim 1, wherein the body has a compressed configuration and an expanded configuration.

3. The device of claim 1, the first end portion of the body further comprising at least one member section having a plurality of second members, the second members each having a proximal end and a distal end, the second members are pair-wise in a V-shape having converging vertices defining a proximal end and open-ended branch ends defining a distal end of the member section.

4. The device of claim 3, the first end portion further comprising a pair of undulate members, each of the undulate members having a first end and a second end, the first end of the undulate members converge to form a tab, the tab being affixed to the second end of the elongate member, the second end of the undulate members being affixed to the vertices of the member section proximal end.

5. The device of claim 1, the second end portion of the body further comprising at least one member section having a plurality of straight members, the straight members each having a proximal end and a distal end, the straight members are pair-wise in a V-shape having open-ended branches defining a proximal end and converging vertices defining a distal end of the member section.

6. The device of claim 5, the second end portion of the body further comprising a plurality of distally extending members, the distally extending members are proximally joined with the converging vertices of the distal end of the member section.

7. The device of claim 6, the distal tip further comprising a coil coaxially arranged about the extending members.

8. The device of claim 6, the distal tip portion further comprising a blunt terminal end formed from a soldered joint.

9. The device of claim 1, the mid-portion further comprising at least one ring member.

10. The device of claim 1, the device further comprising a generally tubular delivery catheter, the delivery catheter including an internal lumen sized to slidably receive the elongate member and the body.

11. The device of claim 1, wherein the device is fabricated from a tubular element using a laser.

12. The device of claim 1, wherein the device is made from self-expanding, superelastic, or shape memory material.

13. A medical device for treating an interior of a patient, comprising:

a body, the body including a first portion having first and second ends, a mid-portion having a ring member, the ring member having a first and second end, the first end of the ring member joined the second end of the first portion and a second portion having a first and second end, the first end of the body second portion with the second end of the ring member, the second end of the body second portion defining a closed terminal end of the body;

the ring member having a plurality of first members in an alternating V-pattern forming sixteen apices at each of the ring first end and second end; and

an elongate member having a first end portion and a second end portion, the second end portion being affixed to the first end of the body first portion and the elongate member first end portion extending exterior of the patient.

14. The device of claim 13, wherein the body first portion provides an opening to an interior of the body.

15. The device of claim 14, the body first portion further comprising two undulate members, each having a first and second end, the undulate members first end converge into a single tab member, the tab member projecting from a sidewall defining the opening and is connected to the elongate member second end portion.

16. The device of claim 15, the body first portion further comprising first, second and third straight member sections, each member section having a plurality of straight members having a first end and a second end and pairs of straight members in a V-shape such that at a proximal end of each straight member section, a pair of straight members converge at their first end to form a vertex and at a distal end of each straight member section, the second end of the straight members form open-ended branch ends.

17. The device of claim 16, wherein the first straight member section includes four straight members forming two proximal vertices and four distal open-ended branch ends, the second member section includes eight straight members forming four proximal vertices and eight distal open-ended branch ends and the third member section includes sixteen straight members forming eight proximal vertices and sixteen distal open-ended branch ends, the two proximal vertices of the first straight member section are joined with the second ends of the undulate members, the four distal open-ended branch ends of the first straight member section are joined with the four proximal vertices of the second straight member section, the eight distal open-ended branch ends of the second straight member section are joined with the eight proximal vertices of the third straight member section, the sixteen distal open-ended branch ends of the third straight member section are joined with the body mid-portion.

18. The device of claim 17, wherein the ring member is self-expanding and operates to provide a consistent opening to an interior to the body.

19. The device of claim 17, wherein each of the straight elements of the ring member have an approximate equal first length.

20. The device of claim 17, the mid-portion further comprising second and third ring members, each of the second and third ring members having a plurality of straight members in an alternating V-pattern forming sixteen apices at the first and second ends of each ring, the first, second and third ring members consecutively merge with the apices to form the mid-portion such that the apices of the first ring member mate with the apices of the second ring member proximal end and the apices of the second ring member mate with the apices of the third ring member.

21. The device of claim 18, wherein the straight members of the first ring member, the second ring member and the third ring member have an equal first length.

22. The device of claim 18, wherein the straight members of the first ring member have a first length, the straight members of the second ring member have a second length and the straight members of the third ring member have a third length, the first length being longer than the second length and the second length being longer than the third length.

23. The device of claim 17, the body second portion further comprising first and second straight member sections, each member section having a plurality of straight members having a first end and a second end and pairs of the straight members in a V-shape such that at a proximal end of each straight member section, the straight members form open-ended branch ends and at a distal end of each straight member section, a pair of straight members converge to form a vertex.

24. The device of claim 23, wherein the first straight member section includes sixteen straight members forming sixteen proximal open-ended branch ends and eight distal vertices, the second member section includes eight straight members forming eight proximal open-ended branch ends and four distal vertices, the sixteen proximal open-ended branch ends of the first straight member section merge into the body mid-portion second end, the eight distal vertices of the first straight member section merge into the eight proximal open-ended branch ends of the second straight member section.

25. The device of claim 24, the body second portion further comprising four distally extending members merged to the four distal vertices of the second straight member section, the four distally extending members have an approximately equal length.

26. The device of claim 23, wherein the second straight member section include four straight members having a first length and four straight members having a second length, the first length being longer than the second length.

27. The device of claim 26, wherein the eight straight members of the second straight member section are in a V-shape to form eight proximal open-ended branch ends and four distal vertices, two distal vertices formed from the straight members having the first length will be longer than the two distal vertices formed from the straight members having the second length, the eight proximal open-ended branch ends of the second straight member section merge with the eight distal vertices of the first straight member section.

28. The device of claim 27, the body second portion further comprising four distally extending members merged with the four distal vertices of the second straight member section, the two distally extending members joined with the two shorter vertices of the second straight member section are tucked within the longer vertices of the second straight member section, the distally extending members joined with the longer vertices are connected to form a distal tip.

29. The device of claim 28, the distal tip further comprising a coil coaxially arranged about the extending members having the first length.

30. The device of claim 13, wherein the body is cut from a tube.