A 58-year-old woman with a history of epiglottitis (currently treated with antibiotics and dexamethasone) is scheduled for urgent airway assessment. She has stridor, dysphagia, and drooling but maintains her airway. Oxygen saturation is 94% on room air. The otolaryngologist and anesthesiologist decide that awake fiberoptic intubation is the safest approach. During the procedure, after successful topical anesthesia and light sedation with remifentanil, the fiberoptic scope is advanced through the nose. As the scope reaches the epiglottis, the patient suddenly coughs vigorously and desaturates to 88%. What is the MOST appropriate immediate action?

Explanation

## Management of Desaturation During Awake Fiberoptic Intubation **Key Point:** Coughing and desaturation during awake FOI indicate inadequate topical anesthesia or airway irritation. The immediate response is STOP, oxygenate, and allow recovery—NOT to push forward or sedate further. ### Clinical Context: Epiglottitis This patient has acute epiglottitis with: - Stridor (upper airway obstruction) - Dysphagia and drooling (severe inflammation) - Marginal oxygen saturation (94% baseline) - Inflamed, edematous epiglottis (extremely sensitive to instrumentation) **High-Yield:** In epiglottitis, the epiglottis is swollen and friable. Mechanical stimulation (scope contact) can trigger: - Severe coughing and laryngospasm - Rapid desaturation - Complete airway obstruction ### Why Desaturation Occurred The vigorous cough indicates: 1. Inadequate topical anesthesia of the epiglottis (despite prior spray/nebulization) 2. Mechanical irritation from scope contact 3. Increased airway resistance due to epiglottic edema **Clinical Pearl:** In epiglottitis, the epiglottis is exquisitely sensitive. Additional topical anesthesia via the scope's working channel (Option 4) may help, BUT only after the patient has recovered and reoxygenated. ### Correct Management: Immediate Actions ```mermaid flowchart TD A[Cough + Desaturation during FOI]:::urgent --> B[STOP: Withdraw scope immediately]:::action B --> C[Apply high-flow O2 via face mask]:::action C --> D[Allow patient to recover spontaneously]:::action D --> E{Saturation recovery?}:::decision E -->|Yes, SaO2 > 92%| F[Reassess airway anesthesia]:::outcome E -->|No, persistent desaturation| G[Consider alternative airway strategy]:::urgent F --> H[Additional topical anesthesia if needed]:::action H --> I[Reattempt FOI with enhanced preparation]:::action ``` **Option 0 (Correct):** - Withdraw scope → removes source of irritation - High-flow O2 → rapidly improves saturation - Allow spontaneous recovery → preserves airway reflexes and patient cooperation - This is the safest immediate response ### Why Other Options Are Wrong **Option 1 (Continue advancing):** - Pushing past the epiglottis while the patient is coughing and desaturating risks: - Laryngospasm (catastrophic in epiglottitis) - Complete airway obstruction - Aspiration of secretions - Violates the principle: "If you cannot see, do not proceed." **Option 2 (Succinylcholine + RSI):** - Succinylcholine is contraindicated in epiglottitis because: - Muscle fasciculations increase intrathoracic pressure → worsens airway obstruction - Epiglottic edema makes intubation even more difficult after paralysis - Loss of spontaneous ventilation in a patient with marginal airway is dangerous - RSI is appropriate for aspiration risk (not present here) but wrong in airway obstruction **Option 3 (Lidocaine via working channel without recovery):** - Instilling lidocaine while the patient is desaturating and coughing is unsafe - The patient needs oxygenation FIRST - Additional airway instrumentation during desaturation increases obstruction risk - This step may be appropriate AFTER recovery and reoxygenation ### Subsequent Management (After Recovery) Once saturation recovers: 1. Reassess airway anesthesia (may need additional topical anesthesia) 2. Consider enhanced sedation (remifentanil infusion) to suppress cough reflex 3. Reattempt FOI with extra caution 4. If repeated desaturation occurs → consider alternative (awake tracheostomy, emergency cricothyrotomy if complete obstruction develops) **Mnemonic: STOP-O-RECOVER** - **S**top advancing the scope - **T**opical anesthesia (reassess) - **O**xygen (high-flow) - **P**atient recovery (spontaneous) - **O**bservation (wait for saturation recovery) - **R**econsider strategy if recurrent