A deflation device for use in deflating an inflatable or implantable balloon device, comprising, in combination: an endoscope tube, having a distal end, a proximal end, and a lumen a cap disposed at the distal end of the endoscope tube and having walls defining a balloon interface chamber a coring device disposed within the lumen and configured to travel within the lumen such that a distal end of the coring device is extendable beyond the distal end of the cap wherein the cap is configured to provide a normal surface of a balloon relative to the orientation of the coring device as the coring device is disposed near the distal end of the cap.
