Methods and devices for treating obesity and GERD by intussuscepting a portion of stomach tissue
Described here are devices and methods for intussuscepting a portion of stomach tissue. Typically the intussusception is created at a position near, but distal to the gastroesophageal junction, and a pouch capable of storing a volume (from about 0 cc up to about 100 cc) is created proximal the intussuscepted tissue. In this way, the amount of food that may be ingested is reduced, helping to ameliorate GERD symptoms, and aiding in weight loss efforts. Some of the devices described here include an expandable member and at least one suction inlet. In these devices, the expandable member is expanded to create a proximal cavity into which the stomach tissue is pulled (e.g., using suction), thereby creating the intussusception.
1. A device for creating an intussusception in a portion of stomach tissue comprising:
an expandable member having a proximal end, distal end, inner surface, outer surface, and defining a cavity therein to receive tissue, and wherein when the expandable member is expanded to an expanded configuration, the proximal end defines a proximal end of the cavity;
a suction inlet distal to the proximal end of the expandable member to draw tissue into the cavity through the proximal end of the cavity to telescope a first region of stomach tissue into a second region of stomach tissue, thereby forming the intussusception;
at least one retaining material;
one or more anchors for deploying at least partially through the intussusception; and
one or more anchor introducers for deploying the one or more anchors, wherein the one or more anchor introducers is configured to radially expand to advance the one or more anchors.
2. The device of claim 1 wherein the expandable member comprises one or more prongs.
3. The device of claim 1 wherein the expandable member can be reduced to a low profile configuration, wherein the expandable member is configured to pass through the intussusception when in its low profile configuration.
4. The device of claim 1 wherein the at least one retaining material is biodegradable.
5. The device of claim 1 wherein the at least one retaining material is releasably attached to the expandable member.
6. The device of claim 1 wherein the at least one retaining material is discontinuous.
7. The device of claim 1 wherein the at least one retaining material is adjustable.
8. The device of claim 1 wherein the at least one retaining material is porous, mesh like, or woven.
9. The device of claim 1 wherein the at least one retaining material is a continuous band.
10. The device of claim 1 wherein the at least one retaining material has a uniform thickness.
11. The device of claim 1 wherein the one or more anchors are biodegradable.
12. The device of claim 1 wherein the one or more anchors are T-tags.
13. The device of claim 1 further comprising a holding for housing the one or more anchor introducers therein.
14. The device of claim 1 further comprising a sizing component for device positioning.
15. The device of claim 1 further comprising markings for device positioning.
16. The device of claim 1 further comprising a protecting portion to limit movement of anchor introducers.
17. The device of claim 1 further comprising a retractable sheath that covers a distal portion of the device.
18. The device of claim 1 further comprising a balloon for radially expanding the anchor introducers.
19. The device of claim 1 wherein the at least one retaining material comprises a first retaining material and a second retaining material.
20. The device of claim 19 wherein the first retaining material is configured for apposition against a distal mucosal surface of the intussuscepted tissue.
21. The device of claim 19 wherein the second retaining material is configured for apposition against a proximal mucosal surface of the intussuscepted tissue
22. The device of claim 21 wherein the second retaining material is approximately cylindrical in shape.