Vascular and bodily duct treatment devices and methods

• US 8,795,345 B2
• Filed: 10/05/2009
• Issued: 08/05/2014
• Est. Priority Date: 07/08/2009
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Concentric Medical, Inc. (Stryker Corporation)
• Inventors: Grandfield, Ryan M., Wilson, Scott D., Miller, John H., Vu, Emily, Pedersen, Kirk L., Bonsignore, Craig L., Sanders, Elliot H.
• Primary Examiner(s): Snow, Bruce E
• Assistant Examiner(s): DUKERT, BRIAN AINSLEY
• Application Number:
  US12/573,676
• Publication Number:
  US 20110009940A1
• Time in Patent Office: 1,765 Days
• Field of Search: 606/200
• US Class Current: 623/1.1
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2230/0008 elliptical or oval

Abstract

A device including a self-expandable member having a proximal end portion, a main body portion and a distal end portion. Each of the self-expandable portions consists of a plurality of cell structures formed by intersecting strut members. In one implementation, at least one proximal cell structure in the proximal end portion has one or more struts that have a width and/or thickness greater than the width and/or thickness of the majority of strut members in the main body and distal end portions of the expandable member. Attached to at least one of the proximal-most cell structures in the proximal end portion is a proximally extending flexible wire having sufficient length and flexibility to navigate the tortuous vasculature of a patient. In another implementation, the device is delivered to the treatment site through the lumen of a delivery catheter.

Claims

1. A device comprising:

an elongate self-expandable member expandable from a first delivery position to a second position, in the first delivery position the self-expandable member being in an unexpanded position and having a first nominal diameter and in the second position the self-expandable member being in a radially expanded position and having a second nominal diameter greater than the first nominal diameter for deployment within a vessel or duct of a patient, the self-expandable member comprising a plurality of cell structures, the self-expandable member having a proximal end portion with a proximal end and an elongate cylindrical main body portion, the proximal end portion located adjacent and proximal to the elongate cylindrical main body portion, the cell structures in the elongate cylindrical main body portion extending circumferentially around a longitudinal axis of the self-expandable member, the cell structures in the proximal end portion extending less than circumferentially around the longitudinal axis of the self-expandable member, the cell structures in the proximal end portion comprising a first set of outer-most cell structures and a second set of outer-most cell structures, each of the first and second set of outer-most cell structures having in common a proximal-most cell structure located at a proximal end of the proximal end portion, the first set of outer-most cell structures include first outer-most wall segments, the second set of outer-most cell structures include second outer-most wall segments, each of the first and second outer-most wall segments forming first and second rail segments, respectively, that each extend from a position at or near a proximal-most end of the self-expandable member to a position at or near the elongate cylindrical main body portion, the proximal-most cell structure of the proximal end portion having first and second outer-most wall segments that extend distally from a proximal antenna, each of the first and second outer-most wall segments of the proximal-most cell structure having a width and/or thickness dimension greater than the width and/or thickness dimension, respectively, of the wall segments that form the remainder of the cell structures in the proximal end portion, the proximal-most cell structure being a closed four-sided structure when the self-expandable member is cut and laid flat on a surface, the closed four-sided structure comprising the first outer-most wall segment, the second outer-most wall segment, a first inner wall segment and a second inner wall segment, the first inner wall segment extending distally from the first outer-most wall segment, the second inner wall segment extending distally from the second outer-most wall segment, other than the first and second outer-most wall segments of the proximal-most cell structure each of the first and second inner wall segments of the proximal-most cell structure having a width and/or thickness dimension greater than the width and/or thickness dimension, respectively, of the wall segments that form the remainder of the cell structures in the proximal end portion.

2. The device of claim 1 wherein the self-expandable member comprises a plurality of generally longitudinal undulating elements with adjacent undulating elements being interconnected in a manner to form the plurality of cell structures.

3. The device of claim 2 wherein the plurality of adjacent undulating elements are interconnected in a manner to cause the plurality of cell structures to be diagonally disposed in relation to one another.

4. The device of claim 1 further comprising a proximally extending elongate flexible wire connected to the proximal antenna of the self-expandable member.

5. The device of claim 1, wherein at least a portion of the expandable member is coated with a radiopaque material.

6. The device of claim 1, wherein the length of the cylindrical main body portion is between about 2.5 and about 3.5 times greater than the length of either the first or second end portions.

7. The device of claim 1, wherein the plurality of cell structures are arranged to induce twisting of the self-expandable as the self-expandable member transitions between the unexpanded position and the expanded position.

8. The device of claim 1, wherein in the radially expanded position the cylindrical main body portion comprises a first region and a second region, the second region having a diameter greater than the first region.

9. The device of claim 8, wherein the diameter of the second region is between about 25.0 to about 35.0 percent greater than the diameter of the first region.

10. The device of claim 8, wherein the second region is located distal to the first region.

11. The device of claim 8, wherein the second region is located at a distal end of the cylindrical body portion.

12. The device of claim 1, wherein each of the first and second outer-most wall segments of the proximal-most cell structure that extend distally from the proximal antenna are straight when the self-expandable member is bisected lengthwise along the longitudinal axis and laid flat on a surface.

13. The device of claim 12, wherein the first and second outer-most wall segments of the proximal-most cell structure are of the same length.

14. The device of claim 12, wherein the first and second outer-most wall segments of the proximal-most cell structure are of a different length.