Distal protection device and method

• US 7,780,696 B2
• Filed: 12/21/2005
• Issued: 08/24/2010
• Est. Priority Date: 03/06/1997
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Daniel, John M. K., Broome, Thomas E., Holtan, David J., Cassell, Robert L., Adams, Daniel O.
• Primary Examiner(s): Milano; Michael J
• Assistant Examiner(s): NGUYEN, VI X
• Application Number:
  US11/314,775
• Publication Number:
  US 20060100662A1
• Time in Patent Office: 1,707 Days
• Field of Search: 606/159, 606/198, 606/200, 606/127
• US Class Current: 606/200
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 2017/00539 hydraulically
• CPC Class Codes: A61B 2017/22049 Means for locking the guide wire in the catheter
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• 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 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0086 Pyramidal, tetrahedral, or wedge-shaped

Abstract

An emboli capturing system captures emboli in a body lumen. A first elongate member has a proximal end and a distal end. An expandable emboli capturing device is mounted proximate the distal end of the first elongate member, and is movable between a radially expanded position and a radially contracted position. When in the expanded position, the emboli capturing device forms a basket with a proximally opening mouth. A second elongate member has a proximal and a distal end with a lumen extending therebetween. The lumen is sized to slidably receive a portion of the first elongate member. An expandable delivery device is mounted to the distal end of the second elongate member and is movable from a radially retracted position to a radially expanded position. The delivery device has a receiving end configured to receive the emboli capturing device, and retains at least the mouth of the emboli capturing device in a radially retracted position.

Claims

1. A distal protection filter assembly, comprising:

an inner wire having a proximal end and a distal end and a longitudinal axis;

a hollow tubular member disposed over the inner wire, the tubular member having a proximal end and a distal end; and

a filter disposed over the hollow tubular member having a proximal end and a distal end,

wherein the filter proximal end is attached to the hollow tubular member,

wherein the filter distal end is fixed on the inner wire such that relative movement between the filter distal end and the inner wire along the longitudinal axis is prevented, and

wherein relative movement between the proximal portion of the tubular member and the inner wire moves the filter from a collapsed insertion position to an expanded position and wherein further relative movement in the same direction between the proximal portion of the tubular member and the inner wire moves the filter to a retrieval position in which the filter is at least partially everted about the proximal portion of the tubular member.

2. The assembly of claim 1 wherein the distal end of the inner wire extends distally of the distal end of the tubular member.

3. The assembly of claim 1 wherein the filter comprises an expandable mesh.

4. The assembly of claim 1 wherein when the filter is in the expanded position, a cavity having a proximally facing opening is formed.

5. The assembly of claim 1 further comprising a spring tip on the distal end of the inner wire.

6. The assembly of claim 1 wherein the filter includes a distal portion and a proximal portion and wherein the proximal portion includes a first expandable mesh and the distal portion includes a second expandable mesh that is tighter than the expandable mesh of the proximal portion.

7. The assembly of claim 1 wherein the filter has a first length in the collapsed insertion position and has a second length in the expanded position that is shorter than the first length.