Pediatric epiglottitis is a rare, life-threatening supraglottic infection that can rapidly progress to complete airway obstruction. Although incidence has declined dramatically since Hib vaccination (99% reduction in children <5 years), it remains a cannot-miss emergency diagnosis. [1-3] In the post-vaccine era, causative organisms have shifted to include S. pneumoniae, Group A Streptococcus, S. aureus, and viral pathogens including influenza A and EBV. [1][4-5]
1. History
- Onset and tempo: Rapid onset (hours) of sore throat, fever, and progressive dysphagia — much faster than croup (which typically has a viral prodrome over days) [1][6]
- Key HPI questions:
- Duration of symptoms (typically <24 hours of acute illness)
- Ability to swallow secretions (refusal to swallow/drooling is highly specific) [7]
- Voice changes — muffled "hot potato" voice vs. hoarseness
- Positional preference — does the child prefer sitting upright/leaning forward?
- Presence or absence of barking cough (cough predicts croup, not epiglottitis) [7]
- Important negatives: Absence of barking/croupy cough (sensitivity 1.00, specificity 0.98 for croup); absence of URI prodrome [7]
- Immunization history: Hib vaccination status is critical [8]
2. Alarm Features
- Stridor (inspiratory) — indicates significant airway narrowing [1]
- Drooling — sensitivity 0.79, specificity 0.94 for epiglottitis vs. croup [7]
- Tripod/sniffing position — child sitting forward, chin extended, refusing to lie down [1][9]
- Rapidly progressive respiratory distress, tachypnea, retractions
- Hypoxia — associated with need for airway intervention [10]
- Toxic appearance with high fever
- Inability to speak or swallow
- Cyanosis or altered mental status — impending arrest
- 37% of children with epiglottitis were initially misdiagnosed as another respiratory illness [7]
3. Medications
- First-line antibiotics:
- IV ceftriaxone (50–100 mg/kg/day divided q12–24h) or cefotaxime (150 mg/kg/day q8h) [1][11]
- Alternative: IV ampicillin/sulbactam (Unasyn) [1]
- Add vancomycin (40–60 mg/kg/day q6–8h) if MRSA is suspected [1]
- A short course of ceftriaxone (100 mg/kg day 1, then 50 mg/kg day 2) was shown to be safe and effective in a prospective trial [11]
- Corticosteroids: IV dexamethasone is often used adjunctively to reduce supraglottic edema, though evidence is largely extrapolated from croup and clinical practice
- Nebulized racemic epinephrine: May be used as a temporizing measure but should not delay definitive airway management
- Contraindicated: Do NOT attempt oral examination with a tongue depressor or cause agitation — this can precipitate complete obstruction [12]
4. Diet
- NPO on presentation — anticipate need for airway intervention
- IV fluid resuscitation as needed for dehydration from poor oral intake
- Resume oral intake only after airway is secured and swelling is resolving
5. Review of Systems
- ENT: Sore throat, dysphagia, odynophagia, voice changes, drooling, trismus
- Respiratory: Stridor, dyspnea, positional breathing preference, cough character
- Constitutional: Fever (often high, >39°C), toxic appearance, irritability
- Neurologic: Anxiety/apprehension disproportionate to apparent distress, altered mental status (late/ominous) [9]
- Infectious: Recent URI symptoms, sick contacts, immunization status
6. Collateral History and Family History
- Immunization records: Hib vaccination status — under-immunized children are at highest risk [3][8]
- Prior episodes: Recurrent epiglottitis has been described, particularly in adults [2]
- Household contacts: If Hib is confirmed, rifampicin prophylaxis for household contacts is indicated [3][11]
- Immunodeficiency: Ask about known immune deficiencies, recurrent infections, or inborn errors of immunity [13]
7. Risk Factors
- Incomplete or absent Hib vaccination — the single most important risk factor in children [1][8]
- Age typically 2–6 years (historically peak ~3.5 years) [12][14]
- Male sex associated with more aggressive disease course [2]
- Immunocompromised states (primary immunodeficiency, chemotherapy)
- Indigenous populations (higher rates of invasive H. influenzae disease) [15]
- Vaccine failure — rare but documented, with cases increasing in some regions [13]
8. Differential Diagnosis
- Croup (laryngotracheobronchitis): Barking cough, gradual onset with URI prodrome, responds to steroids/epinephrine; cough present, drooling absent [7][9]
- Bacterial tracheitis: Toxic child, initially looks like croup but worsens despite treatment; thick tracheal secretions [6]
- Retropharyngeal abscess: Neck stiffness, dysphagia, drooling, unilateral cervical adenopathy; lateral neck film shows prevertebral widening [6]
- Peritonsillar abscess: Trismus, "hot potato" voice, uvular deviation; older children/adolescents
- Foreign body aspiration: Sudden onset without fever, history of choking event [6]
- Angioedema: Rapid onset, no fever, possible urticaria, history of allergies [6]
- Laryngeal diphtheria: Unimmunized patients, gradual onset with pharyngitis prodrome [6]
Key differentiator: Drooling without cough → epiglottitis. Cough without drooling → croup. [7]
9. Past Medical History
- Prior episodes of upper airway obstruction or epiglottitis
- Immunization history (Hib series completion)
- Known immunodeficiency or chronic illness
- History of airway anomalies (subglottic stenosis, laryngomalacia)
- Prior intubation history (relevant for airway planning)
10. Physical Exam
- General: Toxic-appearing, anxious, sitting upright in tripod/sniffing position, refusing to lie down [1][9]
- Vitals: High fever (often >39°C), tachycardia, tachypnea; hypoxia is a late and ominous sign [10]
- Airway: Inspiratory stridor, muffled voice, drooling, refusal to swallow [7]
- Neck: Possible cervical lymphadenopathy [10]
- Do NOT: Examine the oropharynx with a tongue depressor, lay the child supine, or cause agitation — any of these can precipitate acute complete obstruction [12]
- If stable: Allow the child to remain in the position of comfort (usually parent's lap, sitting upright)
11. Lab Studies
- Blood cultures — obtain after airway is secured; historically positive for Hib in up to 96% of cases (pre-vaccine era); now often negative or mixed flora [10][16]
- CBC with differential — leukocytosis with left shift expected; WBC >15,000 with bandemia correlates with bacteremia [17]
- CRP — elevated; high CRP associated with aggressive disease course [2]
- Blood glucose — hyperglycemia associated with more severe disease [2]
- Throat/epiglottic cultures — obtain at time of intubation if performed
- Do NOT delay airway management for labs
12. Imaging
- Lateral neck radiograph:
- Classic "thumbprint sign" — swollen, rounded epiglottis [12][16]
- Epiglottis base width >5 mm (sensitivity 96.2%, specificity 98.2%) [18]
- Diagnostic in virtually all cases when obtained [16]
- Only obtain if the child is stable enough to go to radiology with a clinician skilled in airway management at bedside [12][19]
- Bedside ultrasound: "Alphabet P sign" on longitudinal view through the thyrohyoid membrane — a safe bedside alternative [20]
- CT neck: Generally unnecessary; may be useful if abscess is suspected
- When imaging is unnecessary: If clinical presentation is classic (toxic child, drooling, stridor, sniffing position), proceed directly to the OR for controlled airway management [9]
13. Special Tests
- Direct laryngoscopy — gold standard for diagnosis; reveals a cherry-red, swollen epiglottis [20]
- Bedside ultrasound of the anterior neck — emerging point-of-care tool [20]
- Flexible nasopharyngoscopy — can be used cautiously in cooperative, stable patients (more applicable to adults)
14. ECG
- Not routinely indicated unless hemodynamic instability or cardiac concerns
- Monitor for hypoxia-related arrhythmias in severe cases
- Continuous cardiorespiratory monitoring is essential in all suspected cases
15. Assessment
Pediatric epiglottitis is a true airway emergency. Although now rare due to Hib vaccination, it remains rapidly fatal if unrecognized. The classic presentation — acute onset of high fever, drooling, muffled voice, stridor, and tripod positioning in a toxic-appearing child — should prompt immediate airway management without delay for imaging or labs. [1][12]
- Severity stratification: Stridor, hypoxia, dyspnea, and drooling predict need for airway intervention [10][21]
- Atypical presentations: Post-vaccine era cases may present more indolently or with viral etiologies (EBV, influenza A) [4-5]
- Complications: Complete airway obstruction, respiratory arrest, hypoxic encephalopathy, death; all fatal respiratory obstructions occurred within 12 hours of presentation in one large series [21]
- Misdiagnosis rate: 37% of children with epiglottitis were initially treated for another respiratory illness [7]
16. Treatment Plan
Initial stabilization
- Keep the child calm, in position of comfort (parent's lap, sitting upright)
- Supplemental humidified oxygen (blow-by if not tolerated by mask) [1]
- Do not agitate the child — avoid IV placement, blood draws, or throat examination until airway is secured
- Mobilize anesthesia, ENT/surgery, and PICU simultaneously
Airway management
- Controlled intubation in the OR is the gold standard — performed by the most experienced airway provider with surgical backup for emergency tracheostomy [12][16]
- Nasotracheal intubation is preferred; use an ETT 0.5–1.0 size smaller than age-predicted
- Mean intubation duration is ~18 hours; 90% extubated within 24 hours [22]
- Extubation criteria: resolution of fever (<37.5°C), clinical improvement, passage of 12–16 hours; pre-extubation laryngoscopy is not required [22]
- If complete obstruction occurs before OR: bag-mask ventilation as a temporizing measure [12]
Antibiotics (after airway secured)
- IV ceftriaxone 50–100 mg/kg/day (max 4 g/day) OR cefotaxime 150 mg/kg/day [1][11]
- Alternative: IV ampicillin/sulbactam [1]
- Add vancomycin if MRSA suspected [1]
- Typical IV antibiotic course: 7–10 days (may transition to oral after clinical improvement)
Chemoprophylaxis
17. Disposition
- All children with confirmed or suspected epiglottitis require admission, typically to the PICU/ICU [10][16]
- 75.9% of patients in one series required ICU admission; airway compromise requiring intubation occurred in 27.6% [10]
- In the pre-vaccine pediatric literature, essentially all children were intubated electively [16][22]
- Transfer criteria: If presenting to a facility without pediatric anesthesia/ENT/surgical capability, arrange emergent transfer with a physician skilled in airway management accompanying the patient [14][16]
- Discharge criteria: Afebrile, tolerating oral intake, no stridor, completing antibiotic course (may transition to oral), follow-up arranged
18. Follow Up / Return Precautions
- Follow-up: ENT follow-up within 1–2 weeks; primary care within 1 week of discharge
- Immunization review: Ensure Hib vaccination series is complete; if Hib was the causative organism, the child still needs vaccination as natural disease does not reliably confer immunity in young children [3]
- Return precautions — instruct parents to return immediately for:
- Recurrence of stridor, drooling, or difficulty breathing
- Fever recurrence after initial improvement
- Inability to swallow or refusal to drink
- Any change in voice quality
- Expected recovery: Most children recover fully within 48–72 hours of appropriate treatment; complications are rare with prompt management but include hypoxic encephalopathy if airway management is delayed [16]
- Throat culture follow-up at 4 weeks may be considered to confirm eradication of Hib colonization [11]
References
1. Antibiotic Use in Acute Upper Respiratory Tract Infections. — Sur DKC, Plesa ML. American Family Physician. 2022.
2. Acute Upper Airway Obstruction. — Eskander A, de Almeida JR, Irish JC. The New England Journal of Medicine. 2019.
3. Prevention and Control of Haemophilus Influenzae Type B Disease: Recommendations of the Advisory Committee on Immunization Practices (ACIP). — Briere EC, Rubin L, Moro PL, et al. MMWR. Recommendations and Reports : Morbidity and Mortality Weekly Report. Recommendations and Reports. 2014.
4. EBV Associated Epiglottitis in an Immunocompetent Child. — Babaei S, Momeni A. BMC Pediatrics. 2025.
5. Influenza a-Associated Epiglottitis and Compensatory Pursed Lip Breathing in an Infant. — OʼBryant SC, Lewis JD, Cruz AT, Mothner BA. Pediatric Emergency Care. 2019.
6. Croup. — Bjornson CL, Johnson DW. Lancet. 2008.
7. Symptoms and Signs Differentiating Croup and Epiglottitis. — Tibballs J, Watson T. Journal of Paediatrics and Child Health. 2011.
8. Croup: Rapid Evidence Review. — Cooke A, Conway S, Griffin L. American Family Physician. 2026.
9. Croup. — Cherry JD. The New England Journal of Medicine. 2008.
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11. Successful Treatment of Epiglottitis With Two Doses of Ceftriaxone. — Sawyer SM, Johnson PD, Hogg GG, et al. Archives of Disease in Childhood. 1994.
12. Epiglottitis. — Grodin MA. The Journal of Emergency Medicine. 1983.
13. Haemophilus Influenzae Type B Vaccine Failure in Portugal: A Nationwide Multicenter Pediatric Survey. — Marques JG, Inácio Cunha FM, Bajanca-Lavado MP. The Pediatric Infectious Disease Journal. 2023.
14. Acute Epiglottitis in Infants and Children. — Benjamin B, O'Reilly B. The Annals of Otology, Rhinology, and Laryngology. 1976.
15. Current Epidemiology and Trends in Invasive Haemophilus Influenzae Disease-United States, 2009-2015. — Soeters HM, Blain A, Pondo T, et al. Clinical Infectious Diseases : An Official Publication of the Infectious Diseases Society of America. 2018.
16. Acute Epiglottitis in Children: A Conservative Approach to Diagnosis and Management. — Vernon DD, Sarnaik AP. Critical Care Medicine. 1986.
17. Diagnostic and Therapeutic Efficiency in Croup and Epiglottitis. — Hodge KM, Ganzel TM. The Laryngoscope. 1987.
18. Accuracy of Objective Parameters in Acute Epiglottitis Diagnosis: A Case-Control Study. — Kim KH, Kim YH, Lee JH, et al. Medicine. 2018.
19. Imaging Acute Airway Obstruction in Infants and Children. — Darras KE, Roston AT, Yewchuk LK. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2015.
20. Bedside Ultrasonography as a Safe and Effective Tool to Diagnose Acute Epiglottitis. — Hung TY, Li S, Chen PS, et al. The American Journal of Emergency Medicine. 2011.
21. Acute Epiglottitis. An 18-Year Experience in Rhode Island. — Mayo-Smith MF, Spinale JW, Donskey CJ, et al. Chest. 1995.
22. Acute Epiglottitis: A Different Approach to Management. — Butt W, Shann F, Walker C, et al. Critical Care Medicine. 1988.