Apparatus and methods are provided for cleaning a patient's colon in preparation for colonoscopy. A rigidizable overtube is described, as well as several variations of a colon-cleaning element configured for use with the overtube to clean the patient's colon. In one variation, the colon-cleaning element...http://www.google.co.uk/patents/US20070015965?utm_source=gb-gplus-sharePatent US20070015965 - METHODS AND APPARATUS FOR COLONIC CLEANING
