Distal protection device and method

• US 6,245,089 B1
• Filed: 09/30/1999
• Issued: 06/12/2001
• Est. Priority Date: 03/06/1997
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Daniel, John M. K., Holtan, David J., Cassell, Robert L., Adams, Daniel O., Broome, Thomas E.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): LEWIS, WILLIAM W
• Application Number:
  US09/409,497
• Time in Patent Office: 621 Days
• Field of Search: 606/1, 606/108, 606/194, 606/198, 606/200
• US Class Current: 606/200
• CPC Class Codes: A61B 17/22031 Gripping instruments, e.g. forceps, for removing or smashing calculi A61B17/221 takes precedence
• 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 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22042 Details of the tip of the guide wire
• 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 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2/014 Retrograde blood flow filters, i.e. device inserted against the blood flow direction
• CPC Class Codes: A61F 2002/015 Stop means therefor
• 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 2230/0021 square
• 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
• CPC Class Codes: A61F 2250/0003 : having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61M 2025/09125 : Device for locking a guide wire in a fixed position with respect to the catheter or the human body
• CPC Class Codes: A61M 2025/09183 : having tools at the distal tip

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. An emboli capturing system for introduction into vasculature to capture emboli in blood flowing in the vasculature, the emboli capturing system comprising:

a guidewire having a longitudinal axis and defining a lumen along at least a portion thereof;

an expandable member coupled to a distal portion of the guidewire and having an interior being in fluid communication with the lumen in the guidewire, the expandable member being configured to receive fluid through the lumen to expand and have fluid removed from the interior thereof to collapse; and

an emboli capturing device operable coupled to the expandable member and configured to deploy radially outwardly relative to the guidewire upon expansion of the expandable member.

2. A dilation system, comprising:

a dilation device configured to fragment a restriction in a blood vessel; and

an emboli capturing system, longitudinally movable within the blood vessel relative to the dilation device, the emboli capturing system comprising;

a guidewire having a longitudinal axis and defining a lumen along at least a portion thereof;

an expandable member coupled to a distal portion of the guidewire and having an interior being in fluid communication with the lumen in the guidewire, the expandable member being configured to receive fluid through the lumen to expand and have fluid removed from the interior thereof to collapse; and

an emboli capturing device operably coupled to the expandable member and configured to deploy radially outwardly relative to the guidewire upon expansion of the expandable member.

3. A method of removing a restriction in a blood vessel comprising:

providing a guidewire defining a lumen longitudinally therethrough with an inflatable member coupled to a distal portion of the guidewire and having an interior thereof in fluid communication with the lumen;

providing an emboli capturing device, operably coupled to the expandable member to deploy radially outwardly relative to the guidewire when the expandable member is inflated, and to retract to a retracted position approximating the outer diameter of the guidewire;

inserting the emboli capturing device in the blood vessel;

advancing the emboli capturing device using the guidewire distally of the restriction;

advancing over the guidewire a dilation device;

expanding the expandable member to deploy the emboli capturing device in an expanded position;

fragmenting at least a portion of the restriction using the dilation device; and

capturing the fragmented portion of the restriction from blood in the blood vessel using the emboli capturing device.

4. An emboli capturing system for capturing emboli in a body lumen, comprising:

a first elongate member having a proximal end and a distal end;

an expandable emboli capturing device mounted proximate the distal end of the first elongate member, the emboli capturing device being movable between a radially expanded position and a radially retracted position, the expandable emboli capturing device forming a basket with a proximally opening mouth when in the radially expanded position; and

a second elongate member having a proximal end and a distal end and a lumen extending between the proximal and distal ends, the lumen being sized to slidably receive a portion of the first elongate member therein.