(2) or in cases
in which the medical control doctor judges ETI to be
required. 3. Patients are ineligible for endotracheal intubation,
because there is: (1) suspected cervical spine injury, (2) head-tilt difficulty, (3) trismus, (4) difficulty
with laryngoscope insertion, (5) difficulty with larynx expansion after laryngoscope insertion, (6) difficulty in
visualizing the vocal chords, (7) prolonged unsuccessful attempts, (8) the ELST on the scene is not certified to
perform endotracheal intubation, and (9) rapid sequence intubation (paralysis and sedation) is not used for ETI
as it is only indicated for cardiac arrest.