A tracheal T-tube stent is formed from a flexible, resiliently yieldable material and has a hollow, open-ended tubular body portion which is coaxially insertable into the trachea through a suitable neck incision, and a transverse tubular portion which projects outwardly through the incision and has a...http://www.google.fr/patents/US5054484?utm_source=gb-gplus-shareBrevet US5054484 - Tracheostomy device