DEVICES AND METHODS FOR STOMACH PARTITIONING
A device and method for remodeling or partitioning a body cavity, hollow organ or tissue tract includes graspers operable to engage two or more sections of tissue within a body cavity and to draw the engaged tissue between a first and second members of a tissue remodeling tool. The two or more pinches of tissue are held in complete or partial alignment with one another as staples or other fasteners are driven t9hrough the pinches, thus forming a four-layer tissue plication. Over time, adhesions formed between the opposed serosal layers create strong bonds that can facilitate retention of the plication over extended durations, despite the forces imparted on them by stomach movement. A cut or cut-out may be formed in the plication during or separate from the stapling step to promote edge-to-edge healing effects that will enhance tissue knitting/adhesion.
1 . An apparatus for forming a tissue fold composed of opposed sections of tissue, comprising:
(a) a staple head comprising (i) a staple member having a tissue-contact surface (ii) an anvil member having a tissue-contact surface that confronts the tissue-contact surface of the first member; and (iii) one or more hinge members coupling the staple and anvil members for movement along an axis toward and away from one another, each of said hinge members having proximal and distal sections that are pivotally mounted on said staple and anvil members, respectively, and pivotally joined together at a central hinge, such that movement of the two members toward one another causes the proximal and distal sections of each hinge member to pivot outwardly away from said axis, thereby expanding a tissue-capture region defined by said hinge members and the confronting tissue-contact surfaces of the staple and anvil members;
(b) a tissue engager adapted to extend into and through the tissue-capture region to engage a pinch of body tissue and to retract to withdraw the pinch of body tissue into the tissue-capture region between the staple and anvil members, where continued movement of the staple and anvil members relatively towards one another is effective to compress such pinch of body tissue between the two members; and
(c) a staple adapted to be advanced from the staple member through such pinch of body tissue against the anvil member, to fasten the pinch of body tissue into a stapled tissue fold.
2 . The system according to claim 1 , for use in forming a four-layer tissue fold composed of two sets of opposed sections of tissue, which further includes a second tissue engager adapted to extend into and through the tissue-capture region to engage a second pinch of body tissue and to retract the second pinch of body tissue into the tissue-capture region between the staple and anvil members, alongside the first-mentioned pinch of body tissue, where continued movement of the staple and anvil members relatively towards one another is effective to compress the two pinches of body tissue between the two members, and where said staple is adapted to be advanced from the staple member through the two pinches of body tissue against the anvil member, to fasten the two pinches of body tissue into a four-layer tissue fold.
3 . The system according to claim 2 , wherein the first-mentioned and second tissue engagers are movable between extended and retracted positions along non-parallel paths.
4 . The system according to claim 19 , wherein the first-mentioned and second tissue engagers are movable between extended and retracted positions along parallel paths.
5 . The system of claim 1 , for forming a tissue fold within a patient's stomach, which further includes a guide tube extendable between the patient's mouth, at the tube proximal end, and the patient's stomach, at the tube's distal end, wherein said tissue engager is slidable within the guide tube.
6 . The system according to claim 1 , wherein the tissue engager includes a grasper.
7 . The system according to claim 6 , wherein the tissue engager includes an Alice-type grasper.
8 . The system according to claim 1 , wherein the tissue engager includes a vacuum element.
9 . The system according to claim 1 , which includes a circular array of staples adapted to be advanced from the staple member through such pinch of body tissue against the anvil member, to fasten the pinch of body tissue into a stapled tissue fold.
10 . The system according to claim 9 , wherein said head further includes a cutter adapted to cut a hole through such pinch of tissue.