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ent.epiglottitis.core.v1PRODUCTION
ent.epiglottitis.core.v1

Acute epiglottitis / supraglottitis (airway-emergency triage, controlled airway, IV cephalosporin)

general_internal_medicineacuteadultpediatric
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12/12 authored

Canonical 12-phase frame with authored status for this dossier.

Current phase

Frame

Detailed

Frame as an AIRWAY EMERGENCY first, an infection second. Adult disease now outnumbers paediatric post-Hib-vaccine and is more often missed; paediatric disease is the do-NOT-agitate / OR-controlled-intubation scenario (Sideris Laryngoscope 2020 PMID 31173373; McVernon Epidemiol Infect 2005 PMID 16288684). Sepsis, abscess source-control surgery, deep-neck source control, and the primary anaphylaxis/angioedema pathway are recognised then routed OUT by engine_id; this engine OWNS recognition, the controlled-airway pathway, IV antibiotic + adjunct selection, and ICU disposition.

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epiglottitis scope confirmed; sepsis / abscess-surgery / angioedema concerns routed by engine_id

Patient inputs (20)

Paediatric epiglottitis is the do-NOT-agitate / OR-controlled-intubation scenario; adults present more subacutely and are more often missed; tempo/management differ by age (Sideris Laryngoscope 2020 PMID 31173373; McVernon Epidemiol Infect 2005 PMID 16288684)

Fever supports an infective supraglottitis vs anaphylaxis/angioedema/foreign-body; afebrile rapid lip-tongue swelling pivots toward angioedema (Bridwell Am J Emerg Med 2022 PMID 35489220)

Diabetes independently predicts need for airway intervention (meta-analysis RR ≈ 2.15) and a more aggressive course — lowers the secure-airway threshold (Sideris Laryngoscope 2020 PMID 31173373; Shapira Galitz Laryngoscope 2017 PMID 28493349)

Severe pain on swallowing with a near-normal-looking oropharynx is the single most useful adult discriminator from simple pharyngitis (Bridwell Am J Emerg Med 2022 PMID 35489220; Felton West J Emerg Med 2021 PMID 34787558)

Muffled "hot-potato" voice (not hoarse) localises supraglottic oedema; a Centor-negative throat with a muffled voice pivots toward epiglottitis/PTA (Gottlieb J Emerg Med 2018 PMID 29523424)

Drooling / pooling secretions / refusal to swallow is a late, ominous airway-obstruction sign and a do-not-delay trigger (Sideris Laryngoscope 2020 PMID 31173373; Gottlieb PMID 29523424)

Stridor is the strongest single predictor of airway intervention (meta-analysis RR ≈ 7.15); accelerating distress mandates an immediate controlled airway (Sideris Laryngoscope 2020 PMID 31173373)

Patient sitting forward, refusing to lie flat, sniffing position — a positional airway-protective sign; forcing supine can precipitate complete obstruction (Bridwell Am J Emerg Med 2022 PMID 35489220)

Hypoxia / rising work of breathing is a late sign — desaturation in epiglottitis means imminent loss of airway; an independent predictor of airway compromise (O'Brien Acad Emerg Med 2026 PMID 42023439)

Hypotension / toxic appearance with a supraglottic source → septic supraglottitis; recognise and route OUT to id.sepsis.core.v1 while the airway is being secured

Blood cultures (and epiglottic surface culture once the airway is secured) guide pathogen-directed de-escalation; yield is modest but informs immunocompromised/atypical cases (Bizaki Laryngoscope 2011 PMID 21898436)

Lateral neck X-ray "thumbprint sign" supports the diagnosis only if the airway is stable; gentle flexible fibreoptic laryngoscopy by an airway-capable clinician is the definitive visualisation — the diagnostic key (Bridwell Am J Emerg Med 2022 PMID 35489220)

Contrast neck CT defines an epiglottic abscess or deep-neck extension ONLY when the airway is safe — abscess is a strong airway-intervention predictor and a source-control trigger (Sideris Laryngoscope 2020 PMID 31173373; Penella Eur Arch Otorhinolaryngol 2022 PMID 35396955)

Immunocompromise widens the microbiology to atypical/fungal supraglottitis and lowers the imaging/airway-securing threshold (Felton West J Emerg Med 2021 PMID 34787558)

ACE-inhibitor use, C1-esterase-inhibitor deficiency, or an allergen exposure pivots toward angioedema/anaphylaxis (different airway tempo + adrenaline/icatibant therapy) — a key non-infective look-alike

Hib-unvaccinated/under-immunised raises the H. influenzae type b prior (still the classic paediatric organism); the Hib-conjugate vaccine collapsed paediatric and barely changed adult disease (McVernon Epidemiol Infect 2005 PMID 16288684; Madore Infect Agents Dis 1996 PMID 8789595)

CRP > 100 mg/L is associated with the need for airway intervention; serial trend tracks resolution (Vaid Am J Otolaryngol 2021 PMID 34044211; Shapira Galitz Laryngoscope 2017 PMID 28493349)

Neutrophilic leukocytosis supports bacterial supraglottitis and feeds the severity stratification (Shapira Galitz Laryngoscope 2017 PMID 28493349)

Hyperglycaemia is associated with ICU admission / airway intervention and unmasks occult diabetes (a hard predictor) (Shapira Galitz Laryngoscope 2017 PMID 28493349)

Antibiotic-/steroid-safety gating (β-lactams safe; weigh single-dose dexamethasone) and a difficult-airway modifier in late pregnancy (Bridwell Am J Emerg Med 2022 PMID 35489220)

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Severity triggers (7)

7 need judgement
  • informationallife_threateningimpending_airway_obstruction
    Stridor, drooling/secretion pooling, tripod/sniffing posture, refusal to lie flat, accelerating distress, or falling SpO2 (a LATE sign) in suspected epiglottitis (Sideris Laryngoscope 2020 PMID 31173373; Bridwell Am J Emerg Med 2022 PMID 35489220)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationallife_threateningdo_not_agitate_pediatric_epiglottitis
    Child with suspected epiglottitis — toxic, drooling, tripod posture, refusing to swallow; any agitation/examination/supine positioning may precipitate complete obstruction (Bridwell Am J Emerg Med 2022 PMID 35489220)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationallife_threateningangioedema_or_anaphylaxis_as_the_true_cause
    Rapid lip/tongue/supraglottic swelling with urticaria or allergen exposure, or ACE-inhibitor use / C1-esterase-inhibitor deficiency, afebrile, faster tempo than infective supraglottitis (Bridwell Am J Emerg Med 2022 PMID 35489220)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseveretoxic_septic_supraglottitis
    Toxic appearance, qSOFA ≥2, hypotension on adequate fluids, or NEWS2 in the high-escalation band with a supraglottic source (O'Brien Acad Emerg Med 2026 PMID 42023439)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalsevereepiglottic_abscess
    Epiglottic abscess on CT/endoscopy, or hypersalivation + smoking + non-resolution suggesting abscess formation (Sideris Laryngoscope 2020 PMID 31173373; Penella Eur Arch Otorhinolaryngol 2022 PMID 35396955)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalseverefailed_or_difficult_extubation_criteria
    No cuff-leak, persistent supraglottic oedema on endoscopy, or re-obstruction after extubation attempt (Felton West J Emerg Med 2021 PMID 34787558)
    Trigger could not be auto-evaluated — needs clinician judgement.
  • informationalmoderateimmunocompromised_atypical_or_fungal_supraglottitis
    Immunocompromised host (transplant, neutropenia, HIV, chemotherapy) with supraglottitis — broadened atypical/fungal microbiology and lower imaging/airway-securing threshold (Felton West J Emerg Med 2021 PMID 34787558)
    Trigger could not be auto-evaluated — needs clinician judgement.

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Recommended regimen

Controlled-airway pathway, empiric IV third-gen cephalosporin ± anti-staph/MRSA, debated adjuncts, source-control routing
axis: epiglottitis_airway_first_empiric_iv_and_adjunctstep 1 - Step 1 — Airway FIRST (non-pharmacologic, before any drug)
Selected step "Step 1 — Airway FIRST (non-pharmacologic, before any drug)" — Any suspected epiglottitis; mandatory first action when stridor / drooling / tripod / hypoxia / paediatric do-not-agitate scenario present
  • controlled_airway_OR_ICU_anaesthesia_ENT_surgical_backup_do_not_agitate_child
    first line
    airway_management
    triggers: stridor, drooling, tripod_posture, hypoxia, pediatric_patient, rapid_deterioration
    Felton West J Emerg Med 2021 (PMID 34787558) — failed/difficult airways cause the deaths and anoxic injury; secure the airway in a controlled setting (OR for a child) with the most experienced operator, anaesthesia + ENT present, and a scrubbed surgical-airway (tracheostomy/cricothyroidotomy) backup. Do NOT examine a child's throat with a tongue depressor, cannulate, or lie supine before the airway is controlled (Bridwell Am J Emerg Med 2022 PMID 35489220)

ed playbook — drug actions (3)

  1. 1. ceftriaxone (empiric, start early — do not delay the airway for it)
    rxcui 2193
    adult 2 g (child 50 mg/kg) • IV • q24h
    trigger: Suspected epiglottitis once IV access safe (O'Brien Acad Emerg Med 2026 PMID 42023439)
    H. influenzae + streptococcal cover; early antibiotics associate with lower intubation (RR 0.54)
  2. 2. vancomycin (add if MRSA risk / abscess / immunocompromise)
    rxcui 11124
    15-20 mg/kg • IV • q8-12h
    trigger: Staphylococcal/MRSA risk or epiglottic abscess (Sideris Laryngoscope 2020 PMID 31173373)
    Empiric MRSA cover added to the cephalosporin
  3. 3. dexamethasone (DEBATED adjunct — after airway plan declared)
    rxcui 3264
    adult 10 mg (child 0.6 mg/kg) • IV • single dose
    trigger: Supraglottic oedema, no contraindication, airway plan already declared (O'Brien Acad Emerg Med 2026 PMID 42023439)
    Observational benefit (RR 0.48); never a substitute for the airway

Auto-drafted A&P note

ed

Subjective

- Possible entry pathways: Rapid-onset severe sore throat / odynophagia OUT OF PROPORTION to a near-normal oropharynx ± "hot-potato" voice — the cardinal adult epiglottitis presentation (Bridwell/Long Am J Emerg Med 2022 PMID 35489220; Gottlieb J Emerg Med 2018 PMID 29523424); Stridor, drooling, tripod/sniffing posture, toxic appearance — impending supraglottic airway obstruction; in a child do NOT agitate or examine the throat (Sideris Laryngoscope 2020 PMID 31173373; Bridwell Am J Emerg Med 2022 PMID 35489220); Sore-throat / quinsy engine flagged airway/deep-space red flags and routed IN by engine_id (reciprocal entry from ent.pharyngitis.core.v1 / ent.peritonsillar-abscess.core.v1) (Gottlieb J Emerg Med 2018 PMID 29523424).

Objective

- No vitals, labs, or imaging entered for this encounter.

Assessment

**Acute epiglottitis / supraglottitis (airway-emergency triage, controlled airway, IV cephalosporin)** (ent.epiglottitis.core.v1).
Phenotype framing: Terminal differential with named pivots: epiglottitis/supraglottitis (rapid severe odynophagia out of proportion + muffled voice + drooling + minimal oropharyngeal findings + thumbprint pivot) vs croup (age 6 mo-3 y + barking cough + viral prodrome + gradual + steeple-sign pivot) vs peritonsillar abscess (trismus + unilateral bulge + uvular deviation pivot) vs retropharyngeal abscess (neck stiffness/extension refusal + retropharyngeal widening pivot) vs bacterial tracheitis (toxic + brassy cough + thick tracheal pus + croup-non-responsive pivot) vs anaphylaxis/angioedema (urticaria/allergen or ACE-I/C1-INH + lip-tongue swelling + faster tempo + afebrile pivot) vs inhaled/ingested foreign body (witnessed choking + sudden + afebrile pivot).
Scope: Frame as an AIRWAY EMERGENCY first, an infection second. Adult disease now outnumbers paediatric post-Hib-vaccine and is more often missed; paediatric disease is the do-NOT-agitate / OR-controlled-intubation scenario (Sideris Laryngoscope 2020 PMID 31173373; McVernon Epidemiol Infect 2005 PMID 16288684). Sepsis, abscess source-control surgery, deep-neck source control, and the primary anaphylaxis/angioedema pathway are recognised then routed OUT by engine_id; this engine OWNS recognition, the controlled-airway pathway, IV antibiotic + adjunct selection, and ICU disposition.

No severity triggers fired against current inputs.

Plan

Regimen axis: **Controlled-airway pathway, empiric IV third-gen cephalosporin ± anti-staph/MRSA, debated adjuncts, source-control routing** — step "Step 1 — Airway FIRST (non-pharmacologic, before any drug)".
1. controlled_airway_OR_ICU_anaesthesia_ENT_surgical_backup_do_not_agitate_child (airway_management, first line) — Felton West J Emerg Med 2021 (PMID 34787558) — failed/difficult airways cause the deaths and anoxic injury; secure the airway in a controlled setting (OR for a child) with the most experienced operator, anaesthesia + ENT present, and a scrubbed surgical-airway (tracheostomy/cricothyroidotomy) backup. Do NOT examine a child's throat with a tongue depressor, cannulate, or lie supine before the airway is controlled (Bridwell Am J Emerg Med 2022 PMID 35489220)

Setting playbook (ed) — Recognise the airway emergency, do NOT instrument/agitate, mobilise anaesthesia + ENT + the most experienced airway operator, start empiric IV antibiotics, and move to a controlled-airway environment / ICU (Bridwell Am J Emerg Med 2022 PMID 35489220; Felton West J Emerg Med 2021 PMID 34787558)
2. ceftriaxone (empiric, start early — do not delay the airway for it) adult 2 g (child 50 mg/kg) IV q24h — Suspected epiglottitis once IV access safe (O'Brien Acad Emerg Med 2026 PMID 42023439) (H. influenzae + streptococcal cover; early antibiotics associate with lower intubation (RR 0.54))
3. vancomycin (add if MRSA risk / abscess / immunocompromise) 15-20 mg/kg IV q8-12h — Staphylococcal/MRSA risk or epiglottic abscess (Sideris Laryngoscope 2020 PMID 31173373) (Empiric MRSA cover added to the cephalosporin)
4. dexamethasone (DEBATED adjunct — after airway plan declared) adult 10 mg (child 0.6 mg/kg) IV single dose — Supraglottic oedema, no contraindication, airway plan already declared (O'Brien Acad Emerg Med 2026 PMID 42023439) (Observational benefit (RR 0.48); never a substitute for the airway)

Non-pharmacologic actions:
- Do NOT use a tongue depressor / examine the oropharynx in a child; do NOT cannulate or distress the child; keep calm on a parent's lap with blow-by O2 (Bridwell Am J Emerg Med 2022 PMID 35489220)
- Call anaesthesia + ENT + the most experienced airway operator immediately; prepare a scrubbed surgical-airway backup (Felton West J Emerg Med 2021 PMID 34787558)
- Lateral neck X-ray / fibreoptic laryngoscopy ONLY if the airway is stable and never at the expense of definitive airway management (Bridwell Am J Emerg Med 2022 PMID 35489220)
- Move to the OR (child) or a controlled airway environment (adult) — do not transport an unstable airway without an airway operator

AVOID / contraindication checks:
- Severe beta lactam allergy substitute clindamycin (avoid cephalosporin if anaphylactic penicillin/cephalosporin history — use clindamycin ± alternative MRSA cover)
- Do not delay definitive airway for adjuncts or imaging (Felton West J Emerg Med 2021 PMID 34787558 — failed airways cause the deaths)
- Do not instrument or agitate paediatric airway before controlled setting (Bridwell Am J Emerg Med 2022 PMID 35489220)
- Do not antibiotic monotherapy a drainable epiglottic abscess (Sideris Laryngoscope 2020 PMID 31173373 — abscess is a strong airway intervention predictor and a source control trigger)
- Beta lactams safe in pregnancy weigh single dose dexamethasone (Bridwell Am J Emerg Med 2022 PMID 35489220)

Monitoring

Regimen monitoring:
- continuous airway and saturation monitoring with surgical airway kit at bedside (Felton West J Emerg Med 2021 PMID 34787558)
- serial CRP WBC expect improvement 24-48h (Shapira Galitz Laryngoscope 2017 PMID 28493349)
- extubate only on cuff leak plus visualised resolution of supraglottic oedema (Felton West J Emerg Med 2021 PMID 34787558)
- reassess for epiglottic abscess if no improvement at 48-72h (Penella Eur Arch Otorhinolaryngol 2022 PMID 35396955)

Setting (ed) monitoring:
- Continuous airway + SpO2 monitoring with the difficult-airway trolley + surgical-airway kit at the bedside
- Serial qSOFA/NEWS2 if toxic; re-assess airway continuously, not on a fixed interval

Follow-up plan: Post-extubation airway review and documentation of the difficult-airway event for future anaesthetic alerts. Identify and address the substrate: diabetes optimisation (a hard predictor), immunocompromise work-up if atypical/fungal/recurrent, Hib vaccination if unvaccinated and indicated. Counsel on recurrence (recurrent supraglottitis runs a more severe course — Shapira Galitz Laryngoscope 2017 PMID 28493349). ENT follow-up to confirm mucosal resolution; ACE-inhibitor cessation + allergy/immunology referral if the episode was angioedema rather than infection.
- Close-out criterion: difficult-airway alert documented; substrate-modification + recurrence-counselling + ENT follow-up plan recorded

Monitoring phase: Continuous airway + saturation monitoring with the difficult-airway trolley and a surgical-airway kit at the bedside until the epiglottis is demonstrably resolving. Serial CRP/WBC track infective response; expect clinical improvement within 24-48 h of IV antibiotics. Extubation only when a cuff-leak and direct/endoscopic visualisation confirm supraglottic oedema has settled — failed extubation is a recognised severity trigger. Watch for evolving epiglottic abscess if no improvement at 48-72 h (Penella Eur Arch Otorhinolaryngol 2022 PMID 35396955).

Disposition

Current setting: ed — Recognise the airway emergency, do NOT instrument/agitate, mobilise anaesthesia + ENT + the most experienced airway operator, start empiric IV antibiotics, and move to a controlled-airway environment / ICU (Bridwell Am J Emerg Med 2022 PMID 35489220; Felton West J Emerg Med 2021 PMID 34787558)

Disposition criteria:
- ALL suspected/confirmed epiglottitis → ICU/high-acuity airway-observation bed regardless of intubation status (Bridwell Am J Emerg Med 2022 PMID 35489220)
- No safe ED discharge from the acute presentation (Felton West J Emerg Med 2021 PMID 34787558)

Escalation triggers (move to higher acuity):
- Any sign of impending obstruction (stridor progression, fatigue, falling SpO2) → immediate controlled/surgical airway (Felton West J Emerg Med 2021 PMID 34787558)
- Septic / qSOFA ≥2 → route to id.sepsis.core.v1 with carryover while securing the airway
- Epiglottic abscess / deep-neck extension → ENT for drainage / route to ent.deep-neck-space-infection.core.v1

Earlier-Return Triggers

Return-precaution thresholds (watch for):
- [LIFE_THREATENING] Stridor, drooling/secretion pooling, tripod/sniffing posture, refusal to lie flat, accelerating distress, or falling SpO2 (a LATE sign) in suspected epiglottitis (Sideris Laryngoscope 2020 PMID 31173373; Bridwell Am J Emerg Med 2022 PMID 35489220)
- [LIFE_THREATENING] Child with suspected epiglottitis — toxic, drooling, tripod posture, refusing to swallow; any agitation/examination/supine positioning may precipitate complete obstruction (Bridwell Am J Emerg Med 2022 PMID 35489220)
- [LIFE_THREATENING] Rapid lip/tongue/supraglottic swelling with urticaria or allergen exposure, or ACE-inhibitor use / C1-esterase-inhibitor deficiency, afebrile, faster tempo than infective supraglottitis (Bridwell Am J Emerg Med 2022 PMID 35489220)

Citations

- Bridwell/Long/Koyfman Am J Emerg Med 2022 "High risk and low prevalence diseases: Adult epiglottitis" (PMID 35489220) + Sideris et al, Laryngoscope 2020 systematic review & meta-analysis of predictors of airway intervention in adult epiglottitis (30 studies, 10,148 patients, PMID 31173373) + Gottlieb/Long/Koyfman J Emerg Med 2018 pharyngitis-mimics review (PMID 29523424) + O'Brien et al, Acad Emerg Med 2026 10-y multicentre cohort of early steroid/antibiotic therapy (PMID 42023439) + Felton et al, West J Emerg Med 2021 adult-epiglottitis cohort (PMID 34787558) + Shapira Galitz et al, Laryngoscope 2017 (358 adults, PMID 28493349); Hib-vaccine epidemiology shift McVernon Epidemiol Infect 2005 (PMID 16288684) / Madore Infect Agents Dis 1996 (PMID 8789595) [PMID:31173373](https://pubmed.ncbi.nlm.nih.gov/31173373/)
- Cited evidence (PMID 35489220) [PMID:35489220](https://pubmed.ncbi.nlm.nih.gov/35489220/)
- Cited evidence (PMID 42023439) [PMID:42023439](https://pubmed.ncbi.nlm.nih.gov/42023439/)
- Cited evidence (PMID 28493349) [PMID:28493349](https://pubmed.ncbi.nlm.nih.gov/28493349/)
- Cited evidence (PMID 34787558) [PMID:34787558](https://pubmed.ncbi.nlm.nih.gov/34787558/)

Last reconciled with current guidelines: 2026-05-17.
References
  • Bridwell/Long/Koyfman Am J Emerg Med 2022 "High risk and low prevalence diseases: Adult epiglottitis" (PMID 35489220) + Sideris et al, Laryngoscope 2020 systematic review & meta-analysis of predictors of airway intervention in adult epiglottitis (30 studies, 10,148 patients, PMID 31173373) + Gottlieb/Long/Koyfman J Emerg Med 2018 pharyngitis-mimics review (PMID 29523424) + O'Brien et al, Acad Emerg Med 2026 10-y multicentre cohort of early steroid/antibiotic therapy (PMID 42023439) + Felton et al, West J Emerg Med 2021 adult-epiglottitis cohort (PMID 34787558) + Shapira Galitz et al, Laryngoscope 2017 (358 adults, PMID 28493349); Hib-vaccine epidemiology shift McVernon Epidemiol Infect 2005 (PMID 16288684) / Madore Infect Agents Dis 1996 (PMID 8789595) — PMID:31173373
  • Cited evidence (PMID 35489220) — PMID:35489220
  • Cited evidence (PMID 42023439) — PMID:42023439
  • Cited evidence (PMID 28493349) — PMID:28493349
  • Cited evidence (PMID 34787558) — PMID:34787558