Comparison of Guedel and Wendle tube
The illustration shows two different ways to keep the upper respiratory tract of unconscious patients open in order to ventilate them. The Guedel tube is inserted into the oropharynx, whereas the Wendle tube is a nasopharyngeal tube. They both prevent the tongue from falling back and allow access to the trachea. The Wendle tubus is considered to be more tolerable, as it less freqeuently causes the gag reflex.