Multi-lumen-catheter retractor system for a minimally invasive, operative gastrointestinal treatment

A surgical device, comprising:

• a flexible catheter having a proximal portion, a distal portion, a longitudinal axis and a first lumen formed therein, the first lumen having a distal opening at a distal portion thereof;
• and
• a chamber positioned at the distal portion of the catheter, the distal opening of the first lumen communicating with the chamber, the chamber including first and second movable elements, wherein a proximal portion of the first and second movable elements include a first cross-sectional diameter and a distal portion of the first and second movable elements include a second cross-sectional diameter greater than the first cross-sectional diameter, the elements movable from a reduced profile position to an expanded position to form an asymmetric expanded cage about the longitudinal axis, whereby in the expanded position the chamber is configured to atraumatically contact a wall of a body lumen to provide a reshaped working space within the body lumen, the first and second movable elements connected to the device at respective proximal and distal portions thereof so that an intermediate portion of the elements expands outwardly in the expanded position with respect to the longitudinal axis of the flexible catheter.