A medical device tube having extended retention tabs with notches therein for improved coupling of an inner cannula connector to an outer cannula connector. The medical device tube comprises an outer cannula connector having retention tabs on an outer cannula connector flange attached to the proximal...http://www.google.co.uk/patents/US7600515?utm_source=gb-gplus-sharePatent US7600515 - Tracheostomy tube combination radial snap and bayonet cannula connector
