Devices and methods for placement of partitions within a hollow body organ
Devices and methods for tissue acquisition and fixation, or gastroplasty, are described. Generally, the devices of the system may be advanced in a minimally invasive manner within a patient's body, e.g., transorally, endoscopically, percutaneously, etc., to create one or several divisions or plications within the hollow body organ. Such divisions or plications can form restrictive barriers within a organ, or can be placed to form a pouch, or gastric lumen, smaller than the remaining stomach volume to essentially act as the active stomach such as the pouch resulting from a surgical Roux-En-Y gastric bypass procedure. Moreover, the system is configured such that once acquisition of the tissue by the gastroplasty device is accomplished, any manipulation of the acquired tissue is unnecessary as the device is able to automatically configure the acquired tissue into a desired configuration.
1. A method of acquiring tissue from within a hollow body organ, comprising:
positioning a first acquisition member and a second acquisition member coupled to a distal end of an elongate shaft adjacent to a region of tissue within the hollow body organ, the first and second acquisition members each including a tissue adhering cavity;
with the first and second acquisition members positioned adjacent the region of tissue, moving the first and second acquisition members from a closed configuration in which the first and second acquisition members are in apposition to one another along a longitudinal axis of the elongate shaft to an open configuration in which the first and second acquisition members remain in apposition to one another along the longitudinal axis, wherein, as the first and second acquisition members are being moved to the open configuration, tissue from the region is being adhered within each of the first and second acquisition members into the tissue adhering cavities of the first and second tissue acquisition members; and
moving the first and second acquisition members from the open configuration to the closed configuration, thereby compressing the adhered tissue between the first and second acquisition members in the closed configuration while the tissue remains within the tissue adhering cavities.
2. The method of claim 1 , further comprising fastening the adhered tissue between the first and second acquisition members with at least one fastener.
3. The method of claim 2 , further comprising removing the first and second acquisition members from the hollow body organ.
4. The method of claim 1 , further comprising advancing the first and second acquisition members transesophageally into the hollow body organ.
5. The method of claim 1 , wherein moving the first and second acquisition members from the closed configuration to the open configuration comprises pivoting the first and second acquisition members at a pivot longitudinally positioned between the first and second acquisition members.
6. The method of claim 1 , wherein positioning the first acquisition member and the second acquisition member comprises aligning the members adjacent to a lesser curvature.
7. The method of claim 1 , wherein adhering tissue comprises drawing tissue into each of the first and second acquisition members via a vacuum force created in the tissue adhering cavity of each of the members.
8. The method of claim 1 , wherein adhering tissue comprises adhering tissue simultaneously to the first and second acquisition members.