Q: Fogging or condensation of the endotracheal tube (ETT) is a reliable sign of tracheal intubation?

A) True
B) False

Answer:  False

Fogging or condensation of the ETT is reported up to 83 percent of esophageal intubations, at least per one study - and should NOT be used as a reliable indicator of proper placement of ETT in trachea.


Reference:

Kelly JJ, Eynon CA, Kaplan JL, et al. Use of tube condensation as an indicator of endotracheal tube placement. Ann Emerg Med 1998; 31:575.