Methods and devices for anchoring to tissue
The present invention relates to a tissue securement system, device and method for endoscopy or endosonography-guided transluminal interventions through which a ligation is placed and secured into tissue. An objective of this invention is to provide a stable securement platform for the coupling of secondary anchors to the gastrointestinal tract. Specifically, endoscopy is used to insert an anchoring element through the walls of adjacent body cavities. The ends of the anchoring element are coupled together to form a loop. This anchoring element can be used to secure other anchors or devices to the gastrointestinal tract.
1. An apparatus for securing an anchor to adjacent body cavities in the gastrointestinal tract comprising:
a needle with proximal and distal end portions, the needle including a hollow needle body and a detachable needle tip having a sharpened end;
a stylet positioned coaxially inside the hollow needle body, wherein the stylet includes a lumen;
a connecting element coupled to the detachable needle tip at one end, wherein the needle is configured to be inserted through a wall of a first body cavity and through a wall of a second body cavity and the stylet is advanceable to separate the needle tip from the hollow needle body so that the needle is configured to be withdrawn to leave behind a portion of the connecting element and the needle tip in the second body cavity;
an anchoring element having proximal and distal end portions, the distal end portion of the anchoring element attached to the proximal end of the connecting element, the anchoring element capable of being pulled through the first and second body cavity walls by the connecting element, the distal end portion of the anchoring element coupled to the proximal end portion of the anchoring element to form a loop; and
a dilating element positioned between the proximal end of the connecting element and the distal end of the anchoring element, the dilating element sized to dilate a tissue tunnel so that the anchoring element is configured to be drawn through the tunnel by the connecting element.
2. The apparatus of claim 1 wherein the first body cavity is the esophagus and the second body cavity is the stomach.
3. The apparatus of claim 1 wherein the first body cavity is the antrum pyloricum of the stomach and the second body cavity is the duodenum.
4. The apparatus of claim 1 wherein the first body cavity is a first portion of an intestine and the second body cavity is second portion of the intestine.
5. The apparatus of claim 1 wherein the anchoring element comprises at least one element selected from the group consisting of a suture, tie, thread, band, cord, web, strap, belt, elongated piece of mesh, wire, and a biocompatible patch.
6. The anchoring element of claim 5 wherein the anchoring element comprises a suture.
7. The apparatus of claim 1 wherein the anchoring element is initially folded or coiled before deployment and the anchoring element assumes an unfolded or uncoiled configuration after deployment.
8. The apparatus of claim 1 wherein the anchoring element is coated with a coating.
9. The apparatus of claim 8 further comprising a securement element, said securement element coupling the proximal and distal ends of the anchoring element together.
10. The anchoring element of claim 1 further comprising an anchoring portion configured to facilitate the attachment of additional devices.
11. The apparatus of claim 1 wherein the connecting element comprises at least one element selected from the group consisting of a suture, thread, plastic filament or wire.