Single wire intravascular filter

• US 7,794,472 B2
• Filed: 08/11/2004
• Issued: 09/14/2010
• Est. Priority Date: 08/11/2004
• Status: Expired due to Fees

• Current Assignee: Lifescreen Sciences LLC (Acacia Research Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Brooks, Gordon, Eidenschink, Tracee E. J.
• Primary Examiner(s): Erezo; Darwin P
• Assistant Examiner(s): TYSON, MELANIE RUANO
• Application Number:
  US10/916,114
• Publication Number:
  US 20060036279A1
• Time in Patent Office: 2,225 Days
• Field of Search: 606/200, 606/108, 606/198, 128/830, 128/831, 128/833
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical

Abstract

Single-wire intravascular filters for use in filtering blood clots within the body are disclosed. An intravascular filter in accordance with an illustrative embodiment of the present invention can include a single filter wire defining a first end section, a second end section, and one or more filter loops adapted to collect blood clots contained within a blood vessel. Each of the filter loops can be configured to slope outwardly at an angle away from a central longitudinal axis of the filter to form a conical-shaped structure having an apex section and a base section.

Claims

1. An intravascular filter, comprising:

a single filter wire defining a first end section, a second end section, and a plurality of open-ended filter loops adapted to collect blood clots contained within a blood vessel;

each of the plurality of filter loops sloping outwardly at an angle away from a central longitudinal axis of the intravascular filter and forming a conical-shaped structure having an apex section and a base section distal of the apex section, wherein each of the plurality of filter loops include a longitudinal length and a transverse length, wherein the longitudinal length is longer than the transverse length;

further comprising a retrieval member disposed on the first and second end sections of the filter wire;

wherein said retrieval member comprises a rounded bead;

wherein the first end section terminates proximal of the apex section and is oriented in a direction substantially collinear with the central longitudinal axis;

wherein the second end section terminates distal of the base section and is oriented in a direction substantially collinear with the central longitudinal axis.

2. The intravascular filter of claim 1, wherein each of said plurality of filter loops has a wide configuration.

3. The intravascular filter of claim 1, wherein each of said plurality of filter loops has a narrow configuration.

4. The intravascular filter of claim 1, wherein said filter wire is formed of a superelastic material.

5. The intravascular filter of claim 4, wherein said superelastic material comprises nickel-titanium alloy.

6. The intravascular filter of claim 1, further comprising an anchoring member provided on at least one of said plurality of filter loops.

7. The intravascular filter of claim 6, wherein said anchoring member comprises a barb.

8. The intravascular filter of claim 1, wherein said intravascular filter is retrievable via a jugular approach.

9. The intravascular filter of claim 1, wherein said intravascular filter is retrievable via a femoral approach.

10. The intravascular filter of claim 1, wherein said intravascular filter is a vena cava filter.

11. An intravascular filter, comprising:

a single filter wire defining a first end section, a second end section, and a plurality of discontinuos open-ended filter loops adapted to collect blood clots contained within a blood vessel, said first and second end sections being oriented in a direction substantially collinear with a central longitudinal axis of the intravascular filter;

wherein each of the plurality of filter loops slopes outwardly at an angle away from the central longitudinal axis to form a conical-shaped structure having an apex section and a base section, wherein each of the plurality of filter loops include a longitudinal length and a transverse length, wherein the length is longer than the transverse length; and

a rounded bead disposed on the first and second end sections of the filter wire;

wherein the first end section terminates proximal of the apex section and the second end section terminates distal of the base section.