Devices and methods for gastrointestinal bypass
Gastrointestinal bypass devices are described. In one embodiment, a gastrointestinal bypass device may include an anchoring membrane configured to be attached to a wall of an esophagus with a tissue anchor placed through the anchoring membrane. The anchoring membrane may be configured to be pierced to allow the tissue anchor to be placed through the anchoring membrane. Methods for attaching a device to a tissue wall are described. In one embodiment, a method may include forming a bulge in an anchoring membrane of the device and the tissue wall, piercing the bulge from a first side of the anchoring membrane and a first side of the tissue wall, placing a second retention element of a tissue anchor on a second side of the tissue wall, and, placing a tension element of the tissue anchor through the anchoring membrane and the tissue wall. The tension element may be coupled to the second retention element. The method may further include placing a first retention element on the first side of the anchoring membrane. The first retention element may be coupled to the tension element.
1. A method for attaching a device to a tissue wall, the method comprising:
forming a bulge in an anchoring membrane of the device and the tissue wall;
piercing the bulge from a first side of the anchoring membrane and a first side of the tissue wall to make a hole in the anchoring membrane and the tissue wall;
placing a distal retention element of a tissue anchor on a second side of the tissue wall; and
placing a tension element of the tissue anchor through the hole in the anchoring membrane and the tissue wall, the tension element coupled to the distal retention element.
2. The method of claim 1 , wherein forming a bulge includes drawing the anchoring membrane and the tissue wall with a vacuum.
3. The method of claim 1 , wherein forming a bulge includes pulling the anchoring membrane and the tissue wall with a grasper.
4. The method of claim 1 , wherein piercing the bulge includes advancing a delivery needle through the bulge to position a tip of the delivery needle on a second side of the tissue wall.
5. The method of claim 4 , wherein advancing a delivery needle includes advancing a delivery needle in a direction between 0 degrees and 10 degrees from parallel to the tissue wall other than the bulge.
6. The method of claim 1 , wherein placing a distal retention element includes pushing the distal retention element out of a lumen of the delivery needle.
7. The method of claim 6 , wherein placing a tension element includes pulling the delivery needle back through the bulge.
8. The method of claim 1 , further comprising:
placing a proximal retention element on the first side of the anchoring membrane, the proximal retention element coupled to the tension element.