USMLE Prep - Medical Reference Library

Adult Epiglottitis — Airway First, Targeted Antibiotics, and Controlled Imaging

System: Otolaryngology • Reviewed: Sep 2, 2025 • Step 1Step 2Step 3

Synopsis:

Abrupt sore throat, dysphagia, muffled voice, and drooling with normal oropharyngeal exam suggests epiglottitis. Avoid agitating the airway; secure in a controlled setting if signs of obstruction. Start IV ceftriaxone + vancomycin (coverage varies) and obtain lateral neck radiograph or fiberoptic exam when safe.

Key Points

  • Use the highest‑yield diagnostic test early; do not let testing delay time‑critical therapy.
  • Set objective targets and reassess frequently.
  • Plan definitive source control or disease‑specific therapy when indicated; document follow‑up and patient education.

Algorithm

  1. Suspect epiglottitis → minimize agitation; prepare controlled airway.
  2. Start broad IV antibiotics; obtain imaging/endoscopy only when safe.
  3. Monitor closely; de-escalate therapy based on cultures; vaccinate contacts if indicated.

Clinical Synopsis & Reasoning

Abrupt sore throat, dysphagia, muffled voice, and drooling with normal oropharyngeal exam suggests epiglottitis. Avoid agitating the airway; secure in a controlled setting if signs of obstruction. Start IV ceftriaxone + vancomycin (coverage varies) and obtain lateral neck radiograph or fiberoptic exam when safe.


Treatment Strategy & Disposition

Stabilize ABCs. Initiate guideline‑concordant first‑line therapy with precise dosing and continuous monitoring. Escalate to advanced/procedural interventions based on explicit failure criteria. Define ICU, step‑down, and ward disposition triggers; involve specialty teams early.


Epidemiology / Risk Factors

  • Risk varies by comorbidity and precipitants; see citations for condition‑specific data.

Investigations

TestRole / RationaleTypical FindingsNotes
Bedside assessment for stridor, tripod posture, droolingAirway riskClinical diagnosisAvoid tongue depressor in distress
Lateral neck radiograph or nasopharyngoscopy (when safe)DiagnosisThumb sign, swollen epiglottisOnly after airway plan
Blood cultures and inflammatory markersEtiologyH. influenzae, staph, strepTailor therapy

High-Risk & Disposition Triggers

TriggerWhy it mattersAction
Stridor, tripod posture, droolingImpending airway closureAirway in OR setting; ENT/anesthesia
Rapid progression in adults with diabetesSevere courseEarly broad-spectrum antibiotics
Abscess or failure of antibioticsComplicationSurgical drainage
ImmunosuppressionAtypical pathogensTailor therapy
Limited resources for airway rescueSafetyTransfer to facility with airway expertise

Pharmacology

Medication/InterventionMechanismOnsetRole in TherapyLimitations
Airway control in OR with ENT/anesthesiaDefinitiveImmediatePrevent sudden obstruction
Ceftriaxone 2 g IV daily + VancomycinEmpiric antibioticsHoursCover common pathogensAdjust to cultures
Dexamethasone (selected)AdjunctHoursReduce edema (controversial)

Prognosis / Complications

  • Outcome depends on timeliness of diagnosis and definitive therapy; monitor for complications.

Patient Education / Counseling

  • Provide red‑flag education, adherence guidance, and explicit return precautions; arrange timely specialty follow‑up.

References

  1. ENT/infectious disease guidance on adult epiglottitis — Link