Post-radiation neck surgery: when failure is not an option
A 72-year-old male with head and neck cancer history presenting for elective neck surgery. Multiple critical airway findings — what is your strategy?
Clinical scenario
72-year-old male. Elective neck surgery. History of radiation therapy for head and neck cancer. Limited mouth opening, severely restricted neck mobility, hoarse voice.
Preoperative airway assessment is requested. He is awake and cooperative. Voice is notably hoarse. Neck is stiff with minimal flexion and extension.
First impression
This is not just a difficult airway — it is an unpredictable one. Post-radiation anatomy may look intact but behave differently at laryngoscopy.
LEMON assessment
| Factor | Finding | Concern |
|---|---|---|
| Look externally | Post-radiation changes, stiff neck | Tissue fibrosis, distorted anatomy |
| Evaluate 3-3-2 | Limited mouth opening | Device insertion may be severely restricted |
| Mallampati | Likely high (view limited by opening) | Cannot be reliably assessed |
| Obstruction | Hoarse voice | Possible glottic or supraglottic involvement |
| Neck mobility | Severely restricted | Cannot align airway axes — laryngoscopy view will be poor |
This is not Case 1
In Case 1, failure was difficult but rescuable. Here, failed laryngoscopy and failed mask ventilation can occur simultaneously. The path to CICO is short.
Why the risk is categorically higher
- Radiation fibrosis distorts tissue planes — the airway may look patent but be impossible to intubate
- Limited mouth opening restricts blade insertion for both direct and video laryngoscopy
- Severe neck immobility prevents any positional compensation
- Hoarse voice suggests possible glottic or supraglottic involvement — obstruction risk is real
- If laryngoscopy fails, mask ventilation may also fail — rescue options are limited from the start
If induction proceeds and laryngoscopy fails
Mask ventilation may be impossible due to radiation fibrosis and anatomical distortion. Emergency surgical airway may be the only remaining option — and neck fibrosis makes that harder too.
You are about to induce anesthesia. What is your airway strategy?
- 1.Standard induction with direct laryngoscopy⚠ Not recommended
Post-radiation anatomy is unpredictable — standard laryngoscopy may fail without warning
- 2.Induction with video laryngoscope prepared⚠ Not recommended
Mouth opening may prevent device insertion; does not address ventilation failure risk
- 3.Awake intubation strategy✓ Recommended
Maintains spontaneous breathing and allows assessment under topical anesthesia before commitment
Teaching points
- Radiation changes make the airway unpredictable. The anatomy you see may not be the anatomy you intubate.
- Plan for failure before induction — not after.
- Hoarse voice is a warning sign. It suggests the glottis or supraglottis may be involved.
- In post-radiation airways, failed laryngoscopy and failed mask ventilation can occur at the same time.
- Awake intubation allows you to assess the airway under topical anesthesia — with the patient still breathing.
Apply this in practice
Use the LEMON tool to systematically assess airway difficulty for this patient.
Why this matters: Limited airway access means intubation after induction may be significantly more difficult.
Assess with LEMON →Next clinical question
What happens when intubation and ventilation both fail?
Emergency Airway Failure (CICO) →