@drandrewmackay Here is the issue with watching ETT thru cords. Not necessarily reliable, particular warning in babies. pic.twitter.com/wf7kVkdxLd
— Dr. Laura Duggan (@drlauraduggan) February 3, 2017
Would this anatomy be enough to intubate with confidence? pic.twitter.com/am37hIl1TG
— Dr. Laura Duggan (@drlauraduggan) February 3, 2017
Glottic impersonation in the wild. When you see both, & don't have the glottis under your blade, it's obvious pic.twitter.com/RkQUNbAVD6
— Dr. Laura Duggan (@drlauraduggan) February 3, 2017
Prehospital and Retrieval Medicine - THE PHARM dedicated to the memory of Dr John Hinds 
George Kovacs says “video laryngoscopy, direct laryngoscopy, or even bag-mask ventilation, can distort the esophageal opening (E) causing the esophagus to “impersonate” the glottic (G)”
The answer is: epiglottoscopy before and capnography after to confirm glottic view and tracheal intubation.