Tracheostomy tubes have an outer cannula that is inserted into the trachea and a flange that rests against the neck and allows the tube to be secured in place with tape or ties. Tracheostomy tubes also have an obturator whichi s used to insert the outer cannula which is then removed afterwards. The obturator is kept at the client’s bedside in case the tube becomes dislodge and needs to be reinserted.