The Vortex Approach to Difficult Airway Management: A Practical Framework for Australian Prehospital Clinicians

Airway emergencies are uncommon but can become fatal within minutes. In retrieval, roadside trauma or tactical settings, even experienced clinicians can be pulled into fixation, tunnel vision and repeated attempts at a failing technique. The team must recognise when to stop, communicate the change in plan and restore oxygen delivery before options run out.

Most airway algorithms are primarily teaching or planning aids. The Vortex Approach was deliberately designed as a high-acuity implementation tool: a simple visual and verbal framework for use during the emergency by the whole team. It supports, rather than replaces, local protocols and major difficult-airway algorithms.

This guide explains the three lifelines, the Green Zone, CICO recognition and Neck Rescue, plus equipment that supports preparation and training. For Australian paramedics, HEMS and retrieval clinicians, tactical medics, and emergency providers who need common language in an evolving airway.

What Is the Vortex Approach?

The Vortex Approach was created by Australian anaesthetist Nicholas Chrimes and established in the landmark 2016 British Journal of Anaesthesia special article, “The Vortex: a universal ‘high-acuity implementation tool’ for emergency airway management”. It is a structured, team-based cognitive tool that addresses technical actions and human factors in real time.

Its central premise is deliberately simple: there are only three non-surgical upper-airway lifelines that can establish and confirm alveolar oxygen delivery—face mask, SGA and ETT. The aim is not to follow a rigid device order. The aim is to achieve oxygen delivery efficiently, using whichever lifeline makes sense in the patient, environment and crew context.

The outer Green Zone represents confirmed alveolar oxygen delivery and relative safety. The funnel centre represents diminishing time and options. In training, the visual creates “conceptual imprinting”, helping teams avoid becoming trapped by a failing plan.

The Vortex is not a replacement for DAS, ANZCA, CICM, ambulance service or retrieval protocols. It gives multidisciplinary teams a consistent framework alongside them. The Vortex Approach is copyright Nicholas Chimes and is used with permission. Further information and free resources are available at vortexapproach.org.

The Three Lifelines — and What “Best Effort” Means

A best effort means that viable, clinically appropriate strategies have been applied before a lifeline is declared unsuccessful. It is neither a token first pass nor repeated identical manoeuvres. Official Vortex guidance permits up to three attempts, each adding an untried optimisation; use the minimum number of attempts required. A rare further attempt is reserved for a genuine “gamechanger” expected to make a profound difference without prolonging hypoxia. When best effort fails to restore alveolar oxygen delivery, stop that lifeline.

The five optimisation categories are manipulations, adjuncts, size/type, suction and pharyngeal muscle tone. They are not a checklist to exhaust while the patient deteriorates; they prompt “What meaningful change could make this lifeline work now?” Examples include repositioning, a two-handed seal, an OPA, a different device size, suction or appropriate muscle relaxation.

The tool is circular, so management may start at any lifeline and proceed in any sequence. An SGA may be an immediate bridge in one patient; a well-prepared video laryngoscopy attempt may be appropriate in another. Teams can also use available time to prepare parallel options. What matters is that the group does not confuse a series of unoptimised, repetitive attempts with a best effort.

Lifeline 1 — Face Mask Ventilation

Face mask ventilation is often the fastest route back to oxygen delivery, but it counts as a best effort only when actively optimised. Use positioning appropriate to the patient and injury pattern, jaw thrust where suitable, and OPA or NPA adjuncts in line with local practice. In a difficult mask, a two-person technique—one maintaining a deliberate two-handed seal while another ventilates—can create a usable Green Zone.

Ventilation quality matters as much as a visible seal. Controlled tidal volume and rate discipline reduce hyperventilation, intrathoracic pressure and gastric insufflation. Use waveform capnography and clinical assessment where available; a rising or stable saturation alone is not proof of sustained ventilation.

The Sotair BVM Flow Control Valve is a training device, not a replacement for clinical judgement or local equipment. It limits flow to 55 LPM to help users practise more controlled manual ventilation and reduce hyperventilation errors. Used in simulation alongside two-person BVM practice, it can turn “bagging” into a deliberate, repeatable skill.

The SotairIQ Manual Ventilation Training Package provides live feedback on tidal volume, rate, pressures and mask seal. It makes a crucial question coachable: has the team delivered a best-effort face-mask attempt, or simply applied a mask?

Lifeline 2 — Supraglottic Airway

An SGA can be a first-line oxygenation choice, rescue after failed face-mask ventilation, or bridge while the team reassesses. First- and second-generation devices have a place according to local stock, credentialling and patient factors. The Vortex asks whether the chosen SGA is the most effective route to confirmed alveolar oxygen delivery now.

A best effort includes correct size, safe head and neck position, controlled insertion and active leak management. Check depth, cuff status where relevant, ventilation mechanics and capnography. Suction can improve the view and seal in contamination. If the SGA ventilates, the patient is in the Green Zone: reoxygenate, reassess aspiration and transport risks, and decide whether to keep, convert or replace it.

Avoid the trap of treating an SGA as “only a backup”. In a rapidly desaturating prehospital patient, it may be the most reliable bridge to oxygenation while the team resets. Conversely, persistent leak or absent alveolar ventilation after an optimised attempt is a prompt to leave that lifeline rather than repeat the same insertion.

Lifeline 3 — Endotracheal Tube

Endotracheal intubation may be performed by direct laryngoscopy or video laryngoscopy (VL). The Vortex does not make VL mandatory, but it can support a high-quality ETT best effort by improving the view and allowing colleagues to see the same image. Positioning, blade choice, bougie or stylet use, external laryngeal manipulation, suction and sufficient muscle relaxation are all examples of deliberate optimisations rather than “another go”.

The IntuBlade Video Laryngoscope is a single-use VL system that is TGA registered (ARTG 529608). Its Macintosh 3/4 geometry, USB-C connection to a smartphone or tablet and HD shared visualisation mean it does not require a proprietary monitor. In a retrieval, tactical or crowded resuscitation space, a shared screen can improve team situational awareness, coaching and confirmation of the plan.

Contamination is a recurring challenge in trauma and conflict-injury airways. IntuBlade’s patented integrated saline lens-clearing feature is designed to support vision when blood, vomit or secretions obscure the camera. It pairs naturally with SALAD—Suction Assisted Laryngoscopy and Airway Decontamination—using purposeful suction to clear the pharynx while laryngoscopy proceeds. Practise SALAD before using it under pressure.

A clear view is not the same as a successful lifeline. Limit attempts, confirm alveolar oxygen delivery, and escalate early rather than persisting with a failing ETT technique. The safest next action may be returning to a previously effective mask or SGA lifeline, not attempting a fourth version of the same laryngoscopy.

The Green Zone — Pause, Reoxygenate, Plan

The Green Zone is reached whenever alveolar oxygen delivery is established through a face mask, SGA, ETT or Neck Rescue. It does not mean the airway problem is solved permanently; it means the immediate threat of hypoxaemia has been arrested and the team has an opportunity to act deliberately. The official Vortex explanation frames this opportunity as reoxygenate, gather resources and develop a strategy.

In practical terms: optimise oxygenation and haemodynamics, confirm ventilation with waveform capnography where available, reassess, and decide whether to retain, convert or deliberately replace the lifeline. The choice depends on urgency, transport time, aspiration risk, anatomy, team capability and local protocol.

The Green Zone also provides a human-factors reset. Say it aloud: “We are in the Green Zone.” Assign or reconfirm roles, call for additional help early, and verbalise the trigger that will require a transition. Neck Rescue is also shown at the centre of the Vortex because successful emergency front-of-neck access restores alveolar oxygen delivery and creates the same opportunity to stabilise and plan.

Recognising CICO and Initiating Neck Rescue

In the Vortex Approach, CICO means that best efforts at face mask, SGA and ETT have all failed to achieve alveolar oxygen delivery. This is a functional definition, not simply “the tube will not pass”. A patient may be difficult to intubate yet not CICO if effective alveolar oxygen delivery is occurring through a mask or SGA. Conversely, the time for Neck Rescue may arrive before desaturation becomes profound if the team has efficiently exhausted appropriate lifelines and oxygen delivery is not established.

When CICO is recognised, surgical emergency front-of-neck access (FONA) is the definitive rescue. A 2023 systematic review and meta-analysis of 69 studies reported 3,292 prehospital FONA attempts, with 1,229 available for pooled analysis. The pooled overall success rate was 88% (95% CI 85–91%); surgical techniques had a pooled success rate of 92% (95% CI 88–95%), compared with 52% (95% CI 28–76%) for needle techniques. The authors concluded that surgical techniques appeared more successful and supported existing surgical-FONA guidance in the prehospital setting. Read the review.

The ProCric™ Cricothyrotomy Kit by 6:8 Medical is a compact, single-use, sterile, latex-free surgical cricothyrotomy kit for EMS, tactical, military and emergency clinicians. Its patented Popp Obturator™ is a flat-tipped combined introducer intended to remove the separate tracheal-hook step. The patented Rota-Trach™ Tube uses a rotational locking flange designed to help prevent accidental dislodgement during transport. It has a three-year shelf life and is CE certified and FDA listed. MyMedEquip is the Australian distributor, not the manufacturer or ARTG sponsor.

A kit does not remove the need for a rehearsed technique, trained operator, clear role allocation or compliance with local scope and protocol. Time-critical CICO recognition is the core message. Prime the neck-rescue equipment and team as the Vortex deepens; do not wait until the final failed attempt to decide who will act.

Human Factors — Why the Vortex Matters Beyond the Technique

Airway catastrophes are rarely caused by a single missing device. They commonly involve fixation error, loss of situational awareness, delayed escalation and unclear leadership. The 2005 Elaine Bromiley case remains a seminal teaching example internationally: prolonged failure to establish oxygenation was compounded by a team’s difficulty recognising the need to transition away from repeated unsuccessful efforts. It is a reminder that technical excellence alone does not guarantee an effective crisis response.

The Vortex makes transition explicit. A clinician can say, “Best effort complete—spiralling to the next lifeline,” rather than imply another similar attempt. That language makes the plan visible, invites structured suggestions and gives junior members a framework for speaking up.

Shared visualisation matters too. An IntuBlade screen can show contamination, laryngeal view and device progress rather than rely on one operator’s description. It does not replace leadership, but can improve coaching and collective situational awareness. The same applies to capnography, simulation BVM feedback, visible CICO preparation and clear declarations.

Training the Vortex Approach — Simulation Before the Real Event

You cannot learn the Vortex Approach for the first time in a crisis. It relies on automaticity under simulated stress: recognising oxygenation failure, disciplined best efforts, transition language, CICO priming and confidence to pause in the Green Zone. Include everyone managing ventilation, suction, medications, monitoring, equipment and communications.

Our workshops including the ATMC Difficult Airway Workshop provide a practical, simulation-based opportunity built around the Vortex Approach. Verify current availability, prerequisites and logistics with the organiser. Practise difficult BVM, SGA rescue, contaminated VL/SALAD, and surgical-airway decisions within local credentialling.

Use SotairIQ to make BVM performance measurable; use IntuBlade for VL and contamination-management practice; and use appropriately approved simulation equipment to rehearse the ProCric workflow. Debrief not only whether the tube went in, but whether the team recognised the Green Zone, stated the next transition and prepared CICO rescue early enough.

Frequently Asked Questions

What is the Vortex Approach to airway management?

The Vortex Approach is a team-based tool for real-time airway emergencies. It uses face mask, SGA and ETT lifelines, and directs Neck Rescue when best efforts at all three fail to establish alveolar oxygen delivery. Nicholas Chrimes designed it to complement, not replace, major airway algorithms.

What are the three lifelines in the Vortex Approach?

The three lifelines are face mask ventilation, supraglottic airway and endotracheal tube. A team can start at any and move through the others in the sequence that suits the situation.

What does CICO mean in airway management?

CICO means can’t intubate, can’t oxygenate. In the Vortex framework, it exists when face-mask, SGA and ETT best efforts have all failed to achieve alveolar oxygen delivery. Initiate Neck Rescue under local protocol, credentialling and equipment.

What is the Green Zone in the Vortex Approach?

The Green Zone is reached when any lifeline, including Neck Rescue, establishes alveolar oxygen delivery. Reoxygenate, reassess, gather resources and develop the next strategy. It does not necessarily mean a definitive airway is achieved.

When should you move to Neck Rescue in the Vortex Approach?

Move to Neck Rescue when all three upper-airway lifeline best efforts have failed to restore alveolar oxygen delivery. Recognise it early; do not wait for a particular saturation threshold. Prime the CICO response as the emergency evolves.

What is the best technique for emergency front-of-neck access?

A 2023 prehospital FONA review found surgical techniques had a higher pooled success rate than needle techniques: 92% versus 52%. The appropriate technique remains the one endorsed by your protocol, training, scope and patient context.

How does video laryngoscopy fit into the Vortex Approach?

Video laryngoscopy can optimise an ETT attempt and improve team visualisation, particularly with a shared screen. It is not a licence for repeated attempts. If a genuine best effort fails, transition to another lifeline or Neck Rescue as indicated.

How can teams train the Vortex Approach effectively?

Train as the real team with degraded conditions, contaminated airways, difficult BVM, SGA rescue and CICO decisions. Practise declaring a Green Zone, best effort and transition. Objective ventilation feedback, shared VL views and rehearsed FONA setup improve debriefing.