Segmented embolic system

• US 10,722,687 B2
• Filed: 07/28/2017
• Issued: 07/28/2020
• Est. Priority Date: 12/20/2013
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Bowman, Heath, Tsukashima, Ross
• Primary Examiner(s): Scherbel, Todd J
• Application Number:
  US15/662,685
• Publication Number:
  US 20170333678A1
• Time in Patent Office: 1,096 Days
• 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 2017/00115 with audible or visual output
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• CPC Class Codes: A61B 2017/12068 detachable by heat
• CPC Class Codes: A61B 2017/1209 detachable by electrical current or potential, e.g. electroactive polymer
• CPC Class Codes: A61M 25/0138 having flexible regions as a result of weakened outer material, e.g. slots, slits, cuts, joints or coils
• 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: A61M 25/09041 Mechanisms for insertion of guide wires

Abstract

A catheter system utilizing one or more sensors is described. The catheter can be used as part of an embolic coil system, guidewire system, or combined embolic coil/guidewire system where the devices interact with the catheter system. A variable detachment embolic coil system and guidewire system are also described.

Claims

1. An embolic chain, comprising:

an elongated tether member; and

,

at least two embolic chain members, each of which being fixed to said tether member;

said at least two chain members being composed of an electrically conductive material configured to make contact with powered electrical contacts positioned within a lumen of a catheter to generate heat sufficient to break said elongated tether member;

wherein said tether member is plated with an electrically conductive material.

2. The embolic chain of claim 1, wherein each of said at least two embolic chain members are spheres.

3. The embolic chain of claim 2, wherein each of said at least two embolic chain members have a tether passage therethrough in which said elongated tether member is fixed.

4. The embolic chain of claim 3, wherein each of said at least two embolic chain members have an adhesive passage open to an exterior of said at least two embolic chain members and in communication with said tether passage;

and wherein adhesives are located within said tether passage, having been injected through said adhesive passage.

5. The embolic chain of claim 4, wherein each of said at least two embolic chain members have an internal cavity having an aperture that is open to said exterior of said at least two embolic chain members.

6. The embolic chain of claim 5, wherein said internal cavity contains hydrogels, foams, drugs, or any combination thereof.

7. The embolic chain of claim 6, wherein said aperture is sealed by a bio-absorbable or biodegradable plug.

8. The embolic chain of claim 3, wherein said at least two embolic chain members are composed of platinum, palladium, Nitinol, tantalum, or stainless steel.

9. The embolic chain of claim 3, wherein said at least two embolic chain members comprise a plurality of chain members that are each physically in contact with adjacent embolic chain members.

10. The embolic chain of claim 1, wherein said at least two embolic chain members each comprise a microcoil segment;

and wherein said at least two embolic chain members are connected to each other via a joint member comprising said tether member.

11. The embolic chain of claim 10, wherein said joint member comprises a first conductive band fixed to an end of a first embolic chain member, and a second conductive band fixed to an end of a second embolic chain member, said first conductive band and said second conductive band being further connected to said tether member.

12. The embolic chain of claim 11, wherein said tether member is positioned through a first aperture in said first conductive band, forming a first knot, and through a second aperture in said second conductive band, forming a second knot.