An apparatus for moving an endoscope along a canal-shaped cavity includes an endoscope having a movable distal end for entry into the cavity and a stationary operating end which remains outside of the cavity. A first portion of the endoscope is contained in a turnout tube which has a turnout area for...http://www.google.com.au/patents/US5586968?utm_source=gb-gplus-sharePatent US5586968 - Method and apparatus for moving an endoscope along a canal-shaped cavity
