Conversation so far:
what is the difference between endotracheal and tracheostomy tube
An endotracheal tube is placed into the trachea through the mouth and vocal cords while a tracheostomy tube is placed by a surgical opening through the neck to the trachea.
what are the tracheal tubes for
Tracheal tubes are commonly used for airway management in the settings of general anesthesia, critical care, mechanical ventilation, and emergency medicine
who developed disposable tracheal tubes
Maeterlinck GmbH developed the disposable endotracheal tube and produced a plethora of design variations

Question: what are the tubes made of
Self-contained rewrite: what are endotracheal tubes made of