Methods and apparatus for anchoring within the gastrointestinal tract

摘要

The present invention relates to an anchor configured for minimally-invasive implantation and sized to remain securely positioned within at least a portion of the gastrointestinal tract of an animal. The anchor includes a radial spring formed from an elongated resilient member shaped into an annular wave pattern about a central axis. The anchor defines a central lumen and provides an outward radial force, while allowing for substantial flexure about its perimeter. The anchor is generally removable, but can include fasteners, such as barbs, to further secure it to the surrounding anatomy. In some embodiments, the anchor includes a connector coupling a fixed portion to a removable portion. Further, the anchor can be used to secure a medical device within the body, such as a flexible sleeve within the intestine.

主权项

1. A gastrointestinal implant device comprising:
a flexible sleeve configured to carry chyme from a proximal end of the sleeve to a distal end of the sleeve and adapted to extend into the intestine, the distal end of the sleeve being unsupported; and a wave anchor coupled to a proximal portion of the sleeve, the wave anchor formed of an elongated resilient member and being adapted for attachment within an animal body, the wave anchor defining a central lumen diameter that is variable between a relaxed state and a compressed state, the wave anchor comprising ends separated by an axial length, wherein the axial length is within a range of about 1 inch to about 2 inches; a terminal proximal end of the flexible sleeve being matched in shape to a shape of a terminal proximal end of the wave anchor at a terminal proximal end of the implant device.