Acute Epiglottitis
Life-Threatening Upper Airway Supraglottic Cellulitis
Primary risk age: 2 to 6 Years (Peak occurrence, though rare now due to immunizations)
- Urgency
- Emergency
- Typical age
- 2 to 6 Years (Peak occurrence, though rare now due to immunizations)
- Body system
- Respiratory System
Typical course: Intubation is typically maintained for 48 to 72 hours until inflammation subsides; total antibiotic course spans 7 to 10 days.
Reviewed against AAP · CDC · WHO · NHS guidance Last reviewed 2026-06-13
1. Summary & Pathophysiology
Life-Threatening Upper Airway Supraglottic Cellulitis
Pathophysiology (Development Path)
Invasion of the supraglottic structures (epiglottis, aryepiglottic folds) by pyogenic bacteria leads to rapid, severe inflammatory edema. The epiglottis swells to several times its normal size, bending backward and causing mechanical blockage of the laryngeal inlet, leading to complete airway obstruction.
Primary Causes & Etiology
Haemophilus influenzae type b (Hib) historically. Streptococcus pneumoniae, Streptococcus pyogenes, and Staphylococcus aureus in immunized children.
2. Symptom Continuum
- Early Onset Signs
Sudden onset of high fever (39°C - 40°C), severe sore throat, and dysphagia.
- Progressive Phase
The "4 Ds": Drooling, Dysphagia, Dysphonia (muffled "hot potato" voice), and Distress. The child sits in the "tripod position" (leaning forward on hands, neck hyperextended, jaw jutting out) to maximize airway diameter.
- Severe Indicators
Inspiratory stridor, progressive cyanosis, retractions, tachypnea, severe anxiety, and rapid progression to respiratory arrest. Never examine the throat with a tongue depressor, as it can trigger laryngospasm and complete airway closure.
3. Clinical Verification
Direct visualization of a cherry-red, swollen epiglottis via laryngoscopy in a controlled setting (Operating Room). Lateral neck X-ray showing the diagnostic "thumb sign" due to swollen epiglottis.
4. Care & Elements Plan
Primary Care Treatment Plan
Immediate airway stabilization via endotracheal intubation in an operating room or intensive care unit. Once airway is secured, initiate intravenous antibiotics.
Home Support Elements
Home care is strictly not applicable. This is a medical emergency requiring immediate 911 activation.
Generic Active Ingredients (No Brands)
- Ceftriaxone or Cefotaxime (intravenous cephalosporin active ingredients targeting Haemophilus and Streptococcus)
- Vancomycin (added for methicillin-resistant Staphylococcus aureus coverage).
Lists active elements only. Never administer self-designed therapies.
5. Doctor Critical Lines
Critical Thresholds: When to See a Doctor
Immediate emergency transport is required if a child presents with high fever, sudden drooling, inability to swallow, or sits in a tripod posture.
6. Vaccine & Prevention
Routine Prophylaxis (Prevention)
Avoid exposure to sick contacts and ensure full compliance with standard pediatric immunization schedules.
Immunization Context
Prevented almost entirely by the Haemophilus influenzae type b (Hib) conjugate vaccine series administered in infancy (at 2, 4, 6, and 12-15 months).
7. Timelines & Outlook
Active Timeline
Intubation is typically maintained for 48 to 72 hours until inflammation subsides; total antibiotic course spans 7 to 10 days.
Expected Prognosis
Excellent if the airway is secured early; mortality is under 1% with prompt intubation. If unrecognized, it is highly fatal.
Potential Untreated Complications
Airway obstruction, hypoxic-ischemic encephalopathy, septic shock, and secondary pneumonia.
More in Upper Respiratory Track & Airway Dynamic Inflammations
Severe Acute Laryngotracheobronchitis (Croup)
Upper Airway Viral Subglottic Stenosis
6 Months to 3 Years (Peak occurrence)
Moderate Laryngomalacia
Congenital Supraglottic Airway Collapse
Newborns to 18 Months (Typically presents in first few weeks of life)
Mild Common Cold (Viral Nasopharyngitis)
Self-limiting viral upper respiratory tract infection.
All ages; infants and preschoolers average 6–10 colds per year.