An endoscope having a guide tube is described herein. The assembly has an endoscope which is slidably insertable within the lumen of a guide tube. The guide tube is configured to be rigidizable along its entire length from a relaxed configuration. The endoscope has a steerable distal portion to facilitate...http://www.google.ca/patents/US6837846?utm_source=gb-gplus-sharePatent US6837846 - Endoscope having a guide tube
