Apparatus and method for aiding thrombosis through the application of electric potential

• US 6,658,288 B1
• Filed: 05/05/2000
• Issued: 12/02/2003
• Est. Priority Date: 05/05/2000
• Status: Expired due to Fees

• Current Assignee: Lifeshield Sciences LLC (Acacia Research Corporation)
• Original Assignee: EndoVascular Technologies Incorporated (Boston Scientific Corporation)
• Inventors: Hayashi, Reid
• Primary Examiner(s): ROBINSON, DANIEL LEON
• Application Number:
  US09/565,245
• Time in Patent Office: 1,306 Days
• Field of Search: 623/1, 623/1.1, 623/1.35, 623/1.13, 623/11, 623/1.4, 604/20, 604/19, 606/25, 606/57, 606/104
• US Class Current: 604/20
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/077 having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve
• CPC Class Codes: A61N 1/20 continuous direct currents

Abstract

Disclosed are apparatus and methods for aiding thrombosis through the application of electric potential. In one embodiment, a hollow prosthesis is placed within a patient at a treatment site, such as at an aneurysm. The outer surface of a prosthesis is given a positive charge. The positive charge on the outer surface attracts negatively charged components of blood, thus facilitating the repair of perigraft flow. In another embodiment, a conductive wire is used to pierce a graft and enter an aneurysm sac. The wire is positively electrically charged to aid in thrombosis, thus facilitating the repair of perigraft flow.

Claims

1. An apparatus for repairing a blood vessel at a treatment site of a patient, comprising:

an elongate hollow prosthesis for placement within a blood vessel, the prosthesis having an inner surface, an outer surface, a first end, and a second end, wherein an is electric potential difference may be created between the outer surface and the inner surface, the electric potential difference being sufficient to provide thrombosis; and

an electrode attached to the prosthesis, the electrode having a first circumferentially extending portion spaced from a second circumferentially extending portion connected by a narrow longitudinally extending portion to the first circumferentially extending portion.

2. The apparatus of claim 1, wherein the outer surface has an outer electrode and the inner surface has an inner electrode.

3. The apparatus of claim 2, wherein the outer electrode and the inner electrode are each configured in a serpentine pattern.

4. The apparatus of claim 1, wherein an inner coating is applied to the inner surface and an outer coating is applied to the outer surface, and wherein an electric potential difference is created between the outer surface and the inner surface, the outer surface being positively electrically charged and the inner surface being negatively electrically charged.

5. The apparatus of claim 1, wherein the outer surface of the prosthesis includes a conductive material for use as a positive electrode, the apparatus further including an electric potential source for supplying a positive electric potential to the conductive material, the electric potential source having a positive terminal and a negative terminal, the positive terminal connected to the conductive material, the negative terminal connected to a ground, such that the application of a positive electric potential to the conductive material causes negatively charged components of blood to be attracted to the graft, thus aiding in thrombosis.

6. The apparatus of claim 5, further comprising a detachable connection between the conductive material and the positive terminal of the electric potential source.

7. The apparatus of claim 1, wherein the electric potential difference is provided to seal the apparatus within a blood vessel.