Devices and methods for the treatment of vascular defects

• US 9,855,051 B2
• Filed: 03/18/2015
• Issued: 01/02/2018
• Est. Priority Date: 09/10/2010
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Aboytes, Maria G., Rosqueta, Arturo S.
• Primary Examiner(s): LYNCH, ROBERT A
• Application Number:
  US14/661,233
• Publication Number:
  US 20150272590A1
• Time in Patent Office: 1,021 Days
• CPC Class Codes: A61B 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12163 having a string of elements connected to each other
• CPC Class Codes: A61B 17/12168 having a mesh structure A61B17/1214 takes precedence
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61M 29/00 Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00
• CPC Class Codes: H05K 999/99 dummy group

Abstract

Devices and methods for treating vascular defects, such as, for example, balloon-type aneurysms, are described herein. In one embodiment, an apparatus includes an insertion portion and an expandable implant. The expandable implant is configured to be deployed in an aneurysm and is coupled to the insertion portion. The expandable implant has a first portion and a second portion coupled to the first portion. The expandable implant is movable between a first configuration in which the first portion and the second portion are substantially linearly aligned and a second configuration in which the second portion at least partially overlaps the first portion.

Claims

1. An expandable implant configured to be positioned within an aneurysm, the implant comprising:

a first braid having a collapsed configuration and an expanded configuration, wherein in the collapsed configuration the first braid is configured to be contained in a delivery device and in the expanded configuration the first braid has a plurality of petal-shaped portions;

a second braid having a collapsed configuration and an expanded configuration, wherein, in the collapsed configuration, the second braid is configured to be contained in a delivery device and the second braid is positioned along a central longitudinal axis of the implant at a location that is proximate the first braids,

wherein at least one of the first braid and the second braid is a flattened tubular braid, and

wherein, in the expanded configuration—

the petal-shaped portions of the first braid are configured to contact and conform to an inner surface of the aneurysm thereby forming a spherical layer; and

the second braid is positioned within an interior volume defined by the spherical layer.

2. The implant of claim 1 wherein the spherical layer is a first spherical layer and wherein the second braid forms a second spherical layer in the expanded configuration and an average width of the first spherical layer is greater than an average width of the second spherical layer.

3. The implant of claim 1 wherein an average stiffness of the first braid is greater than an average stiffness of the second braid.

4. The implant of claim 1 wherein the petal-shaped portions are first petal-shaped portions, and wherein the second braid includes a plurality of second petal-shaped portions in the expanded configuration.

5. The implant of claim 4 wherein an average width of the first petal-shaped portions is greater than an average width of the second petal-shaped portions.

6. The implant of claim 4 wherein the first braid has more first petal-shaped portions than the second braid has second petal-shaped portions.

7. The implant of claim 4 wherein an average length of the first petal-shaped portions is greater than an average length of the second petal-shaped portions.

8. The implant of claim 4 wherein an average stiffness of the petal-shaped portions of the first braid is greater than an average stiffness of the petal-shaped portions of the second braid.

9. The implant of claim 1 wherein the first braid and the second braid are discrete, separate braids, and wherein the implant further includes a coupler positioned between and coupled to the first and second braids.

10. The implant of claim 1 wherein the first braid and the second braid are discrete, separate braids, and wherein the implant further includes a flexible elongated member extending through the first braid and the second braid, thereby mechanically coupling the first braid to the second braid.

11. The implant of claim 1 wherein a proximal portion of the second braid is configured to be releasably coupled to a delivery device.

12. The implant of claim 1, further including a flexible member configured to extend distally from the distal portion of the first braid and configured to have a curved shape in a non-constrained configuration.

13. The implant of claim 1 wherein the petal-shaped portions are first petal-shaped portions, the second braid includes a plurality of second petal-shaped portions in the expanded configuration, and the spherical layer is a first spherical layer, and wherein the implant further comprises a third braid having a collapsed configuration and an expanded configuration, wherein—

the third braid is positioned along the central longitudinal axis of the implant at a location that is proximate the second braid; and

wherein, in the expanded configuration—

the second petal-shaped portions are configured to contact and conform to an inner surface of the first spherical layer thereby forming a second spherical layer within the first spherical layer; and

the third braid is positioned within an interior volume defined by the second spherical layer.

14. The implant of claim 1 wherein the second braid is a tubular braid configured to form a three-dimensional structure in the expanded configuration.