Devices and methods for gastrointestinal bypass
View Patent ↗Devices and methods for gastrointestinal bypass are described. A gastrointestinal bypass device includes a gastrointestinal cuff and a gastrointestinal sleeve. The cuff may be configured to be attached in the esophagus, and may be sufficiently flexible to expand and collapse to conform with the inside of the esophagus to allow the esophagus to function substantially normally. The sleeve is configured to be coupled to the cuff, and may be made of a material that is floppy or flaccid but does not substantially expand radially.
1. A gastrointestinal cuff device configured to be attached in a gastrointestinal lumen, the device comprising:
a liner having a proximal portion, a distal portion, and a longitudinal axis; and
a plurality of struts coupled to the liner at an acute angle with respect to the longitudinal axis of the liner, wherein the struts are configured to twist the liner about the longitudinal axis to prevent the liner from inverting when a retrograde force is applied to the distal portion of the liner.
2. The device of claim 1 , wherein the struts are coupled to an inner surface of the liner.
3. The device of claim 1 , wherein the liner includes an inner layer and an outer layer, and wherein the struts are coupled to the liner between the inner layer and the outer layer.
4. The device of claim 1 , wherein the angle is between 1 and 30 degrees.
5. The device of claim 1 , wherein one or more of the struts includes a first eyelet at a proximal portion of the strut, the first eyelet configured to receive a tissue anchor.
6. The device of claim 5 , wherein the proximal portion of the liner includes an anchor hole, and wherein the first eyelet is aligned with the anchor hole.
7. The device of claim 1 , wherein one or more of the struts includes a second eyelet at a distal portion of the strut, the second eyelet configured to be coupled to the liner.
8. The device of claim 1 , wherein one or more of the struts includes a proximal portion that is more flexible than a central portion of the strut.
9. The device of claim 1 , wherein one or more of the struts includes a distal portion that is more flexible than a central portion of the strut.
10. The device of claim 1 , wherein the liner is made of a first material, and the struts are made of a second, different material.
11. The device of claim 1 , wherein the liner includes a lumen which at least partially closes when the struts twist the liner about the longitudinal axis.
12. The device of claim 1 , wherein the distal portion of the liner is substantially cylindrical.