Medical device

• US 7,452,496 B2
• Filed: 03/31/2003
• Issued: 11/18/2008
• Est. Priority Date: 06/23/2000
• Status: Expired due to Fees

• Current Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Original Assignee: Salviac Ltd. (Abbott Laboratories Incorporated)
• Inventors: Brady, Eamon, Kelly, Ronald
• Primary Examiner(s): McDowell; Suzanne E.
• Application Number:
  US10/402,320
• Publication Number:
  US 20040093013A1
• Time in Patent Office: 2,059 Days
• Field of Search: 264/573, 264/156
• US Class Current: 264/573
• 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 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical

Abstract

A collapsible filter element (40) for a transcatheter embolic protection device (1). The filter element (40) comprises a collapsible filter body (41) which is movable between a collapsed stored position for movement through a vascular system and an expanded position for extension across a blood vessel such that blood passing through the blood vessel is delivered through the filter element (40). A proximal inlet portion of the filter body (41) has two inlet openings (50) sized to allow blood and embolic material enter the filter body (41), and a distal outlet portion of the filter body (41) has a plurality of small outlet openings (51) to allow through-passage of blood, but to retain embolic material within the filter body (41). The filter body (41) is of an oriented polymeric material.

Claims

1. A method for manufacturing a filter body for a transcatheter embolic protection device comprising forming a filter body of oriented polymeric material and the step of conditioning the formed filter body, wherein the conditioning is carried out at a temperature in the region of the crystallisation temperature of the material.

2. A method as claimed in claim 1, wherein the filter body is formed by applying an axial stretching force to a hollow body of polymeric material.

3. A method as claimed in claim 1, wherein the filter body is formed by applying a circumferential force to a hollow body of polymeric material.

4. A method as claimed in claim 1 comprising stretch blow moulding a polymeric material.

5. A method as claimed in claim 1, wherein the polymeric material is oriented at a temperature above the glass transition temperature of the material or one of its phases, and below the melting temperature of the material.

6. A method as claimed in claim 1 comprising providing inlet and outlet holes in the body of the oriented material.

7. A method as claimed in claim 6 wherein the holes are provided by

filling the formed body with a filler material;

machining holes in the filled body; and

removing the filler material.

8. A method as claimed in claim 7 wherein the filler material is a soluble material, such as polyethyleneglycol.