• Patients who cannot be adequately oxygenated
or ventilated using bag-mask ventilation.
• Patients in whom it is impossible to establish an airway via
oral or nasal endotracheal intubation due to any of the following:
• Bleeding from upper airway structures.
• Massive emesis.
• Masseter spasm.
• Spasm of the larynx or pharynx.
• Laryngeal stenosis.
• Structural deformities of the upper airway.
• To avoid delay in airway control in patients with upper airway
obstruction, thus preventing or shortening periods of anoxia.
• Patients with maxillofacial trauma, laryngeal trauma (except
for tracheal transection), and unstable cervical spine fractures
to minimize movement of the neck.
• An elective situation when a patient is undergoing surgery of
the head, face, or neck.