Failure of the Airway Scope to reach the larynx

Successful tracheal intubation with the McGrath® MAC video laryngoscope after failure with the Pentax-AWS™ in a patient with cervical spine immobilization

“…Then again, the Pentax-AWS may also have some limitations for intubation because failed tracheal intubations using the Pentax-AWS have been reported in patients with a long distance from the mouth to the larynx and with a smaller mouth opening. 4,5 We also failed to intubate this patient's trachea using the Pentax-AWS, probably because of the relatively short interincisor distance (30 mm) and the long thyromental distance (85 mm). …”

Airway management – ‘spinning silk from cocoons’ (抽丝剥茧 – Chinese idiom)

“…Videolaryngoscopes, including the C-MAC [12][13][14] and hypopharyngeal tongues. In these cases, the device's tip fails to reach and elevate the epiglottis, reducing the view.…”

Differences in two new rigid indirect laryngoscopes

“…The Airway Scope therefore requires proximity to the larynx for successful intubation and is intended to be placed under the epiglottis. Failures have been reported when the distance from the mouth to the larynx is longer than the set length of the Airway Scope blade [2]. We have also had two such failures.…”