A seal is provided for effectively inhibiting the egress of fluids from the working channel of an endoscope when an elongate device having a region with a non-circular cross-sectional shape is disposed therein. The seal has a body portion with a proximal end adapted for insertion of the elongate device,...http://www.google.es/patents/US7645266?utm_source=gb-gplus-sharePatente US7645266 - Fluid seal for endoscope
