Airway Management in Patients with Severe Head Injury

Introduction to Airway Management

• The Difficult Airway Society recommends orotracheal intubation as the definitive airway management approach in patients with severe head injury and signs of basilar skull fracture, due to the risk of intracranial passage through a fractured cribriform plate with nasotracheal intubation 1, 2.
• Videolaryngoscopy should be used preferentially for orotracheal intubation, as it reduces cervical spine movement and improves first-pass success rates, with the Difficult Airway Society providing Grade A evidence (moderate recommendation) for its superiority over direct laryngoscopy in patients with suspected cervical spine injury 3, 4, 5.

Technical Considerations for Intubation

• The American Society of Anesthesiologists recommends removing the anterior portion of the cervical collar during intubation attempts while maintaining manual in-line stabilization to minimize cervical spine movement and improve glottic visualization 5, 6.
• Jaw thrust rather than head-tilt/chin-lift should be used for airway positioning, as this reduces cervical spine movement (mean 4.8° vs 14.7° flexion-extension) 1, 2, 5.
• Consider using a bougie or stylet as an adjunct, particularly given the anticipated difficult view with cervical immobilization—studies show 22% of patients have nothing visible beyond the epiglottis with in-line stabilization 5.

Contraindications for Other Airway Management Options

• Nasotracheal intubation is contraindicated in patients with clear signs of basilar skull fracture, due to the documented risk of intracranial passage of the endotracheal tube through fractured skull base 1, 2.
• Cricothyroidotomy and tracheostomy are not first-line procedures but rather rescue techniques for failed orotracheal intubation, and should follow Difficult Airway Society guidelines for emergency front-of-neck airway access in "cannot intubate, cannot oxygenate" scenarios 7, 8.

Critical Pitfalls to Avoid in Airway Management

• High-flow nasal oxygen should not be used for pre-oxygenation in patients with basilar skull fractures, due to case reports of pneumocephalus 1, 2.
• Intubation should not be delayed for awake fiberoptic technique in patients with severe head injury, as they require immediate definitive airway control, and videolaryngoscopy has comparable safety with faster execution 8.
• Excessive cricoid pressure should not be applied if it impairs visualization, as it should be removed if intubation difficulty is encountered 8.