Apparatus and methods for endoscope assemblies having working channels with reduced bending and stretching resistance are disclosed. In one embodiment, an endoscope assembly includes a sheath having a body portion adapted to at least partially encapsulate an endoscopic insertion tube, and a working channel...http://www.google.ca/patents/US7056284?utm_source=gb-gplus-sharePatent US7056284 - Endoscope assemblies having working channels with reduced bending and stretching resistance
