Embolic coil implant system and implantation method

Patent metadata

Field	Value
Publication number	US-9775621-B2
Application number	US-201615383241-A
Country	US
Kind code	B2
Filing date	Dec 19, 2016
Priority date	Jul 15, 2008
Publication date	Oct 3, 2017
Grant date	Oct 3, 2017

Abstract

Embolic coil implant systems and methods whereby coils are mechanically detachable are disclosed. The coils include a retention element that may be releasably retained within the distal end of an implant tool. The implant tool may include a fulcrum configured to engage a first filament and prevent the release of the coil when the first filament is engaged. Alternatively, an urging means and aperture may be disposed within the sidewall of the implant tool, and a first filament may, in conjunction with the aperture and sidewall, releasably retain the coil until the first filament is withdrawn. The implant tool may also include an alignment member for aligning the first filament.

First claim

What is claimed is:

1. An embolic coil deployment system for release of an embolic coil in a subject, the system comprising:
an elongate shaft having a proximal portion and a distal end and a lumen configured to receive and releasably retain an embolic coil therein, the shaft further comprising a sidewall, and an aperture in the sidewall;
a handle secured on the proximal portion of the shaft;
a paddle formed in the sidewall, the paddle disposed at least partially within the aperture, the paddle having a proximal end attached to the sidewall and a free distal end;
a shoulder defined by an edge of the aperture; and
a filament disposed within the lumen, wherein the filament, the sidewall and the shoulder are configured to releasably retain the embolic implant, and the paddle is configured to urge release of the implant upon withdrawal of the filament.

2. The system according to claim 1 , wherein said paddle is formed to define an elongate segment and a broadened segment.

3. The system according to claim 1 , wherein said sidewall lies in a curved plane, said paddle is flexible beyond said curved plane, and is biased into the lumen of the shaft.

4. The system according to claim 3 , wherein said paddle is flexed beyond said curved plane by said embolic coil and said filament.

Assignees

• Penumbra Inc

Inventors

• Tompkins Ben
• Bose Arani
• Hui Delilah
• Barry David
• Pons Stephen
• Leynov Aleksander

Classifications

• A61B17/12154 Primary

  having stretch limiting means · CPC title

• A61B17/1214

  Coils or wires · CPC title

• A61B17/12113

  within an aneurysm · CPC title

• A61B2017/12054

  Details concerning the detachment of the occluding device from the introduction device · CPC title

• A61B17/12181

  formed by fluidized, gelatinous or cellular remodelable materials, e.g. embolic liquids, foams or extracellular matrices · CPC title