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PSA: You *CANNOT* use a "bougie" or Eschmann Intubating Stylet to do an endotracheal tube exchange. I have seen this mistake twice in the past 6 months. You will lose the airway. A simple look at the length of the bougie and an #ETT will make this clear. 
The length of an adult ETT is about 32 cm and the length of the #eschmannstylete is 70 cm. This leaves no room in the center for you to grab it. When you retract the #ETT to the end of the stylet, its distal tip is still in the patient's mouth & entire stylet is covered
To do a tube exchange, you need 2x the length of the ETT and then some additional length to work with, else you risk retracting the exchange device too far and losing the airway. This is why they make an "airway exchange catheter" and its length is 83cm: cookmedical.com/products/cc_ca…
