Stridor at rest and laryngeal tumor: this airway cannot wait
A 68-year-old male with progressive dyspnea, stridor at rest, and a laryngeal tumor. SpO₂ 93% on room air. The airway is already critically narrowed.
Clinical scenario
68-year-old male. Urgent airway evaluation. History of laryngeal tumor. Progressive dyspnea over 3 days. Stridor audible at rest. SpO₂ 93% on room air.
He is sitting upright, visibly working to breathe. Voice is muffled. No external neck swelling. Mouth opening appears adequate. Anxiety is evident.
First impression
This is not a difficult airway. It is already a dangerous one. The stridor tells you the lumen is critically narrowed — right now, while the patient is awake and maintaining tone.
LEMON assessment
| Factor | Finding | Concern |
|---|---|---|
| Look externally | No obvious external abnormality | External appearance is misleading here |
| Evaluate 3-3-2 | Appears adequate | Not the limiting factor in this case |
| Mallampati | Difficult to assess reliably | Tumor location is the issue, not oropharyngeal view |
| Obstruction | Stridor at rest, laryngeal tumor | Critical narrowing already present — dominant finding |
| Neck mobility | Unknown | Not the primary concern |
One factor is enough
Most LEMON factors appear acceptable. But obstruction alone — when it produces stridor at rest — is sufficient to make this the highest-risk airway category. The other factors are irrelevant.
Why induction is dangerous
- Stridor at rest means the residual lumen is already critically narrow
- Induction agents and muscle relaxants remove airway tone — the last thing keeping the lumen open
- Complete obstruction can occur within seconds of induction
- Mask ventilation cannot overcome a completely obstructed airway
- Failed laryngoscopy + failed mask ventilation = no oxygen delivery = cardiac arrest
If induction is attempted
Loss of airway tone leads to complete obstruction. You cannot ventilate. You cannot intubate. Emergency surgical airway may be the only option — in a patient who was breathing moments before.
You are about to secure the airway. What is your strategy?
- 1.Standard induction with direct laryngoscopy⚠ Not recommended
Induction removes airway tone — complete obstruction may follow within seconds
- 2.Induction with video laryngoscope prepared⚠ Not recommended
Equipment does not address the obstruction itself — if the lumen closes, no device will help
- 3.Awake intubation strategy✓ Recommended
The only approach that preserves the airway while allowing controlled assessment and intubation
Teaching points
- Stridor is a warning, not a symptom. It means the airway is already critically narrowed.
- Induction agents remove airway tone — the last thing keeping the lumen open. Complete obstruction can follow within seconds.
- In active airway obstruction, awake intubation is not a preference. It is a requirement.
- Most LEMON factors may appear normal. Obstruction alone — when it produces stridor at rest — overrides everything else.
- The patient is currently breathing. Your goal is to keep it that way throughout the airway securing process.
Apply this in practice
Use the Awake Intubation Decision tool to evaluate the indications and prepare your approach.
Why this matters: Airway obstruction can rapidly worsen after induction, making ventilation impossible.
Awake Intubation Decision →Next clinical question
What happens if the attempt fails and you cannot ventilate or intubate?
Emergency Airway Failure (CICO) →What would you check next?