Post-Extubation Stridor Management

Introduction to Post-Extubation Stridor

Post-extubation stridor affects 1-30% of extubated patients, typically presenting within minutes following extubation, with the American Society of Anesthesiologists recommending inhaled epinephrine as first-line treatment for conscious patients, followed by systemic corticosteroids if symptoms persist 1, 2

Risk factors for post-extubation stridor include prolonged intubation, traumatic or difficult intubation, large endotracheal tube size, high cuff pressures, nasal intubation, and non-elective intubation, with the American Thoracic Society suggesting preventive measures such as using appropriate tube size, minimizing intubation duration, and monitoring and regulating cuff pressure 2
The cuff leak test should be performed before extubation in patients with at least one risk factor, with a leak <110 ml of absolute volume or <10% of relative volume indicating high risk, and has good specificity (92%) but moderate sensitivity (56%) 2, 3

Nebulized epinephrine (L-epinephrine 1% solution or racemic epinephrine 2.25%) is effective, with effects lasting 30 minutes to 2 hours, requiring continuous monitoring, and may need repeated doses, according to the American College of Chest Physicians 1, 4
Systemic corticosteroids, such as dexamethasone IV (>0.3 mg/kg), should be continued for at least 48 hours to reduce reintubation rates, as recommended by the Society of Critical Care Medicine and the American College of Chest Physicians 1, 4
Continuous positive airway pressure (CPAP) should be applied with 100% oxygen using a reservoir bag and facemask to ensure upper airway patency, as suggested by the American Thoracic Society 1
Larson's maneuver can be used to relieve laryngospasm by displacing the mandible forward in a jaw thrust and applying deep pressure, according to the American Heart Association 1

Reintubation should be considered if respiratory failure develops, with propofol (1-2 mg/kg IV) for early laryngospasm and suxamethonium (1 mg/kg IV) for severe cases with total cord closure, as recommended by the American Society of Anesthesiologists 1
Close observation for at least 24 hours after treatment is necessary, with warning signs requiring immediate attention including worsening stridor, increased work of breathing, oxygen desaturation, and agitation, according to the American College of Chest Physicians 1, 4
Preparation for intubation should be performed without delay in the presence of respiratory failure, with equipment for difficult airway management readily available, as recommended by the American Society of Anesthesiologists 1

In pediatric patients, particularly infants, higher risk of post-extubation stridor and critical ETT size selection should be considered, with multiple doses of corticosteroids potentially beneficial in high-risk neonates 2
Prophylactic corticosteroids should be administered to patients with a positive cuff leak test, starting at least 6 hours before extubation, as recommended by the American College of Chest Physicians 2, 4
Patients should be closely monitored for at least 24 hours after initial treatment, as stridor can recur, and possible side effects of epinephrine and corticosteroids should be monitored 4

A differential diagnosis should consider other causes of stridor, such as paradoxical vocal cord movement, aspiration of blood clots, or tracheal pseudomembranes 1
Otorhinolaryngology evaluation should be requested in case of persistent stridor despite treatment, need for reintubation, or suspicion of structural laryngeal injury, as recommended by 4, 5, 6
Securing the airway (intubation if necessary) and considering tracheotomy in refractory cases is crucial, with immediate consultation with an otorhinolaryngologist 5, 6

Antibiotic therapy for suspected bacterial infection should start with Aminopenicillin (e.g., amoxicillin), with alternatives including Aminopenicillin + beta-lactamase inhibitor (e.g., amoxicillin-clavulanate) or Macrolides (e.g., azithromycin) for coverage of atypical organisms, and duration of therapy is typically 5-7 days 7
Antifungal therapy with fluconazole or amphotericin B is recommended for fungal (candidal) laryngitis, with early detection using laryngoscopy being crucial, as recommended by the Infectious Diseases Society of America 8

Symptomatic relief measures, such as warm salt water gargles, throat lozenges, and NSAIDs to reduce inflammation, are recommended by the Infectious Diseases Society of America 9
Conservative treatment with voice rest, hydration, humidification, avoidance of irritants, and throat lozenges or warm liquids is recommended for symptomatic relief, according to the American Academy of Otolaryngology-Head and Neck Surgery 10, 11
The routine use of corticosteroids for hoarseness and laryngitis without stridor should be avoided due to the lack of efficacy data and potential side effects, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 11, 6