Implant including a coil and a stretch-resistant member

摘要

This invention is directed to implantable coils and, more particularly, to a coil implant having a stretch-resistant member internal to the coil. The implant of the invention is able to freely articulate and torque prior to delivery. Once delivered, the implant is no longer stretch resistant and is therefore able to substantially conform to the vascular site.

主权项

1. A coil implant, comprising:
a first coil segment defining a first lumen having a first cross-sectional dimension; a second coil segment, having at least a portion extending within the first lumen, the second segment being connected to the first segment and defining a second lumen having a second cross-sectional dimension, less than the first cross-sectional dimension; a stretch-resistant member disposed within the first lumen; and a rod comprising a proximal portion and a distal portion, the proximal portion having a proximal cross-sectional dimension less than the second cross-sectional dimension, and being configured to extend proximally past the second segment and configured to be received within the second lumen, and the distal portion (i) coupled to the stretch-resistant member, (ii) positioned within the first lumen distal to the second segment, and (iii) having a distal cross-sectional dimension greater than the second cross-sectional dimension; wherein the rod is capable of moving completely into the first lumen distal to the second segment.