Evidence‑Based Indications and Management of Endotracheal Intubation

Indications for Intubation

Endotracheal intubation is recommended for airway protection, airway control, and respiratory failure requiring mechanical ventilation; key clinical scenarios include acute respiratory failure, shock, coma, airway obstruction, and cardiopulmonary arrest. [1][2]
Patients who cannot protect their airway because of a markedly reduced level of consciousness (e.g., coma with Glasgow Coma Scale ≤ 8) should be intubated. 1
Any cause of airway obstruction—such as trauma, thermal injury, or anatomical abnormality—constitutes an indication for immediate intubation. 1
Individuals with a high risk of aspiration (e.g., full stomach, intestinal obstruction, gastro‑esophageal reflux disease, or elevated intra‑abdominal pressure) merit early airway protection via intubation. 2
Burn patients who develop dyspnea, oxygen desaturation, or stridor require prompt intubation to secure the airway. 1

In patients with cervical spine injury, urgent intubation is indicated to protect the airway while minimizing further neuraxial damage. 1
Early intubation in cervical spine injury has been shown to reduce secondary neurological injury. 1
Normal findings on nasendoscopy are reassuring, but clinical signs alone are not sufficiently sensitive to predict the need for intubation in burn victims. 1

When severe hypoxemia persists after one or more intubation attempts, clinicians should transition without delay to a front‑of‑neck airway (FONA). 1
To prevent hypoxemia during induction, pre‑oxygenate patients in a head‑up position using CPAP/NIV or high‑flow nasal oxygen. 1
Succinylcholine should be avoided after 24 hours post‑burn injury because of the risk of hyperkalemia. 1
In cervical spine injury, only the anterior portion of the cervical collar should be removed while maintaining manual in‑line stabilization to facilitate mouth opening. 1
Videolaryngoscopy is recommended for intubating patients with cervical spine injury, as it improves first‑pass success while limiting cervical movement. 1
A bougie should be employed during direct laryngoscopy when manual in‑line stabilization degrades the glottic view. 1
In burn patients, an uncut (uncuffed) tracheal tube should be placed initially to accommodate anticipated facial swelling. 1

The Society of Critical Care Medicine recommends rapid sequence intubation as the preferred technique for patients at high risk of aspiration (e.g., full stomach, gastrointestinal obstruction, reflux disease, increased intra‑abdominal pressure) to minimize aspiration risk and provide optimal intubating conditions. 3

When severe hypoxemia persists after one or more intubation attempts, clinicians should promptly proceed to a front‑of‑neck airway rather than continue repeated attempts. 4
Emergency front‑of‑neck airway is indicated after failed intubation when both supraglottic airway devices and facemask ventilation are unable to provide adequate oxygenation. 4
Delaying the transition to a front‑of‑neck airway because of procedural hesitation is associated with greater morbidity than the complications inherent to the procedure itself. 4
No specific oxygen saturation threshold is mandated for initiating a front‑of‑neck airway; however, establishing an emergency airway before profound hypoxemia develops is recommended to improve outcomes. 4