Emergency Airway Management

Emergency airway management addresses situations in which oxygenation is failing and routine techniques cannot secure the airway, culminating in the 'cannot intubate, cannot oxygenate' scenario. It centres on a rapid, oxygenation-first escalation that ends, when necessary, in front-of-neck access such as cricothyrotomy.

Definition

Emergency airway management is the rapid rescue of a failing airway, escalating through ventilation attempts to front-of-neck access (such as cricothyrotomy) when oxygenation cannot otherwise be restored.

Scope

This topic covers the recognition of the failing airway, the stepwise rescue sequence when mask ventilation, supraglottic devices, and intubation have failed, the role of front-of-neck access, and the importance of pre-oxygenation. It is a reference description of the emergency pathway and does not provide procedural or dosing instructions.

Core questions

• How is a 'cannot intubate, cannot oxygenate' situation recognised and declared?
• What is the escalation sequence when standard techniques fail?
• What is the role of front-of-neck access in airway rescue?

Key concepts

• Cannot intubate, cannot oxygenate (CICO)
• Front-of-neck access
• Cricothyrotomy
• Oxygenation-first escalation
• Pre-oxygenation and apnoeic oxygenation
• Declaring failure and calling for help
• Human factors in a crisis

Mechanisms

When successive techniques fail, hypoxaemia develops within minutes, so the emergency pathway is built to prioritise oxygenation and to escalate without delay. Guidelines define an ordered sequence: optimise mask ventilation, attempt a supraglottic airway, and, if oxygenation still cannot be achieved, declare a 'cannot intubate, cannot oxygenate' situation and proceed to front-of-neck access such as cricothyrotomy to restore gas exchange below the obstruction (Frerk, 2015). Pre-oxygenation and apnoeic oxygenation extend the safe apnoea time and buy time during these manoeuvres (Patel, 2015).

Clinical relevance

The emergency airway pathway is a core safety competency in anaesthesia, and audit evidence links delayed recognition and reluctance to perform front-of-neck access with poor outcomes (Cook, 2011; Frerk, 2015). This entry is a conceptual reference and not a basis for individualised management.

Epidemiology

True 'cannot intubate, cannot oxygenate' events are rare but carry high risk of harm; the NAP4 audit characterised such events and the factors associated with adverse outcomes (Cook, 2011).

Evidence & guidelines

The Difficult Airway Society and ASA difficult-airway guidelines define the emergency escalation pathway and the place of front-of-neck access, while physiological work on apnoeic oxygenation informs how oxygenation is preserved during rescue (Frerk, 2015; Apfelbaum, 2022; Patel, 2015).

History

Standardised emergency-airway pathways were strengthened after audits such as NAP4 exposed failures in recognising and rescuing the failing airway; the 2015 DAS guidelines formalised the escalation to front-of-neck access, and apnoeic-oxygenation techniques were later described to extend safe apnoea time (Cook, 2011; Frerk, 2015; Patel, 2015).

Debates

Which front-of-neck access technique should be the default?

The choice between a scalpel-based surgical cricothyrotomy and cannula techniques, and how best to train for them, remains debated, with guidelines emphasising a reliable, practised technique that restores oxygenation.

Seminal works

• frerk-2015
• cook-2011-nap4

Frequently asked questions

What does 'cannot intubate, cannot oxygenate' mean?

It is the emergency in which neither tracheal intubation nor other ventilation methods can maintain oxygenation, triggering escalation to front-of-neck access such as cricothyrotomy (Frerk, 2015).

Why is pre-oxygenation emphasised before airway management?

Pre-oxygenation, and techniques that prolong apnoeic oxygenation, extend the time available before hypoxaemia develops, providing a safety margin during difficult or emergency airway management (Patel, 2015).