Recoilable thrombosis filtering device and method

• US 6,540,767 B1
• Filed: 02/08/2000
• Issued: 04/01/2003
• Est. Priority Date: 02/08/2000
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: DiMatteo, Kristian, Walak, Steven E., DeVries, Robert B., Proskoczilo, Bernedette
• Primary Examiner(s): Milano, Michael J.
• Assistant Examiner(s): HO, TAN-UYEN THI
• Application Number:
  US09/500,209
• Time in Patent Office: 1,148 Days
• Field of Search: 606/200, 606/108, 606/127, 606/113, 606/159, 606/158, 606/191, 606/194, 128/898, 623/1.24
• 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 2/0108 Both ends closed, i.e. legs gathered at both ends
• 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 2210/0028 cooled
• CPC Class Codes: A61F 2210/0038 electromagnetically
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal

Abstract

A thrombosis filter which can be securely affixed at a selected location in the vascular system of a patient and removed when no longer required, and method for removing the thrombosis filter. An embodiment of the thrombosis filter includes a plurality of struts made from a shape memory alloy which changes shape at a temperature other than body temperature, thereby allowing removal of the filter.

Claims

1. A thrombus filter element for placement within a blood vessel lumen defined by a blood vessel wall comprising:

a plurality of struts comprising a shape memory material;

a plurality of anchoring elements disposed on a plurality of struts, wherein said anchoring elements engage said blood vessel wall;

wherein the shape memory material has a selected temperature at which the struts change shape;

wherein the struts are divided into a first grouping and a second grouping;

wherein said first grouping and second grouping of said plurality of struts attach to a body portion;

wherein said body portion includes at least one aperture, said second grouping of said struts radiate from within said aperture, said body portion further including a hooking means, wherein said hooking means comprises of a conducting material; and

wherein said second grouping of said plurality of struts retract within said aperture when the temperature of said shape-memory material is generally lower than body temperature.

2. A thrombus filter element for placement within a blood vessel lumen defined by a blood vessel wall comprising:

a plurality of struts comprising a shape memory material;

a plurality of anchoring elements disposed on a plurality of struts, wherein said anchoring elements engage said blood vessel wall;

wherein the shape memory material has a selected temperature at which the struts change shape;

wherein the struts are divided into a first grouping and a second grouping;

wherein said first grouping and second grouping of said plurality of struts attach to a body portion;

wherein said body portion includes at least one aperture, said second grouping of said struts radiate from within said aperture, said body portion further including a hooking means, wherein said hooking means comprises of a conducting material; and

wherein said second grouping of said plurality of struts retract within said aperture when the temperature of said shape-memory material is generally higher than body temperature.