Distributed activator for a two-dimensional shape memory alloy

• US 5,941,249 A
• Filed: 11/25/1996
• Issued: 08/24/1999
• Est. Priority Date: 09/05/1996
• Status: Expired due to Fees

• Current Assignee: Ronald S. Maynard
• Original Assignee: Ronald S. Maynard
• Inventors: Maynard, Ronald S.
• Primary Examiner(s): Yu, Mickey
• Assistant Examiner(s): NGUYEN, DINH X
• Application Number:
  US08/756,099
• Time in Patent Office: 1,002 Days
• Field of Search: 128/898, 128/897, 623/1, 623/11, 623/12, 600/36, 606/191, 606/192, 606/194
• US Class Current: 128/898
• CPC Class Codes: A61B 1/0058 using shape-memory elements
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61M 25/0158 with magnetic or electrical means, e.g. by using piezo materials, electroactive polymers, magnetic materials or by heating of shape memory materials
• CPC Class Codes: F03G 7/065 using a shape memory element

Abstract

An aneurism patch apparatus for treating an aneurism formed in a vessel includes a vessel interface side and an opposing non-interface side. A patch is formed of a sufficiently flexible material to provide a patch stowed state when the patch is delivered through the vessel and a patch deployed state when the patch is at least partially positioned over the mouth of the aneurism. The interface side of the patch is configured to form an adherence between the patch and an area of a vessel wall adjacent to the aneurism mouth. The adherence maintains a fixed position of the patch relative to the aneurism mouth.

Claims

1. A method for treating an aneurism, comprising:

providing a patch including a vessel interface side and an opposing non-interface side, the patch being formed of a sufficiently flexible material to provide a patch stowed state when the patch is delivered through the vessel and a patch deployed state when the patch is at least partially positioned over the mouth of the aneurism, the interface side of the patch being configured to form an adherence between the patch and an area of a vessel wall adjacent to the aneurism mouth, and wherein the patch includes an aperture for communication with the aneurism;

introducing the patch through the vessel in the stowed state;

positioning the patch at least partially adjacent to the aneurism so that the aperture is substantially adjacent to the mouth of the aneurism;

deploying the patch from the stowed state to the deployed state; and

forming an adherence between the patch and an area of a vessel wall adjacent to the aneurism mouth.

2. The method of claim 1, wherein the adherence maintains a position of the patch relative to the aneurism.

3. The method of claim 1, further comprising:

applying a low pressure source to the aneurism through the aperture of the patch to evacuate the aneurism.

4. The method of claim 3, further comprising:

at least partially collapsing the aneurism.

5. The method of claim 1, further comprising:

delivering adhesion material to an area between the vessel wall and the interface surface of the patch at least partially after the patch is in the deployed state.

6. The method of claim 2, wherein the patch is passively activated from the stowed state to the deployed shape.

7. The method of claim 2, wherein the patch is actively deployed from the stowed state to the deployed shape.

8. The method of claim 2, wherein at least a portion of the patch is made of a material that provides passive deployment to the deployed state.

9. The method of claim 2, wherein at least a portion of the patch is made of a material that provides active deployment to the deployed state.