Overtube introducer for use in endoscopic bariatric surgery

摘要

This application describes an overtube device that gives diagnostic and/or therapeutic access to body cavities using natural orifices of the body. The overtube includes an elongate flexible body having a distal portion deflectable in response to activation of a control cable. Proximal features of the overtube include an insufflations port and seals for minimizing loss of insufflations pressure around the shafts of instruments passed through the tube. In some embodiments, retractor elements are including on the distal portion of the overtube.

主权项

1. An endogastric overtube, comprising:
a flexible elongate tube extending along a longitudinal axis; at least one lumen extending along a length of the elongate tube; and a retractor assembly proximate a distal end of the elongate tube, the retractor assembly including:
a plurality of control elements extending disposed about the longitudinal axis, the plurality of control elements including at least a first control element and a second control element; anda plurality of expandable elements coupled to the plurality of control elements, each expandable element of the plurality of expandable elements being configured to deflect at a hinge and transform from a retracted configuration to an expanded configuration in response to a change in position of at least one control element of the plurality of control elements,wherein each expandable element includes a first end and a second end, and for each expandable element, the first end is coupled to the first control element, and a connection location between the first end and the second end is coupled to the second control element through the hinge, such that in the expanded configuration, the second end is positioned radially outwards of the first end.