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Approach to the Critical Patient
Airway and Red Flags
Airway risk screen
Stridor
Drooling
Muffled voice
Tripod positioning
Respiratory distress
Inability to swallow secretions
Rapid symptom progression hours
Toxic appearance
Suspected epiglottitis or deep neck infection
Angioedema concern
Immediate escalation triggers
If stridor with increased work of breathing, airway team activation
If suspected epiglottitis, avoid agitating exam, controlled airway plan
If impending obstruction, prepare for awake technique and surgical airway backup
Monitoring and Initial Stabilization
Physiologic priorities
Oxygenation targets
SpO2 94-98% if hypoxemia
SpO2 88-92% if chronic hypercapnia risk
Work of breathing trend
Accessory muscle use
Fatigue
Supportive measures
Humidified air
Upright position
NPO if aspiration risk or airway concern
IV access if dehydration or severe symptoms
Key Concepts
Syndrome framing
Acute laryngitis as laryngeal mucosal inflammation with dysphonia
Viral upper respiratory infection as most common cause
Airway-threatening mimics require early recognition and separate pathway
Antibiotics not routinely indicated in uncomplicated acute laryngitis
History
Symptom Pattern and Timeline
Core symptom cluster
Hoarseness
Sudden onset after URI symptoms
Voice fatigue
Sore throat
Odynophagia
Cough
Dry cough
Post-infectious cough pattern
Fever
High fever concern for bacterial infection or influenza
Time course
Duration less than 3 weeks as acute
Persistent dysphonia more than 3 weeks as urgent laryngeal evaluation trigger
Recurrent episodes as reflux or irritant exposure consideration
Exposures and Risk Factors
Infectious exposures
Sick contacts
Influenza or COVID circulation exposure
Pertussis exposure
Irritant and mechanical triggers
Smoking
Vaping
Occupational fumes or chemicals
Recent voice overuse
Recent shouting or singing
Reflux risk
Heartburn
Regurgitation
Nocturnal cough
Throat clearing
High-risk contexts
Immunocompromised state
Diabetes
Recent head and neck surgery
Inhaled corticosteroid use
Prior intubation
Professional voice user needs rapid voice restoration strategy
Red Flag History
Airway danger symptoms
Stridor
Drooling
Inability to swallow
Rapidly worsening dyspnea
Alternate diagnosis clues
Neck swelling
Trismus
Unilateral severe throat pain
Foreign body sensation after choking event
Allergic trigger with lip or tongue swelling
Malignancy risk features
Dysphonia more than 3 weeks
Hemoptysis
Unintentional weight loss
Neck mass
Heavy smoking history
Physical Exam
General and Airway Assessment
Airway and breathing findings
Voice quality
Hoarseness
Aphonia
Breathy voice
Stridor presence and timing
Inspiratory
Biphasic
Respiratory effort
Retractions
Tachypnea
Fatigue
Hydration status
Dry mucous membranes
Tachycardia
Toxicity screen
Ill appearance
Altered mental status
High fever pattern
Head and Neck Exam
Oropharynx and oral cavity
Tonsillar exudate
Uvular deviation
Posterior pharyngeal bulge
Pooling of secretions
Neck
Cervical lymphadenopathy
Tenderness along anterior neck
Submandibular swelling
Crepitus concern for perforation
Laryngeal and voice-related exam
Cough character
Throat clearing
Wheeze versus stridor differentiation
PITFALLS
High-risk misses
Epiglottitis without obvious oropharyngeal findings
Deep neck infection with minimal early throat findings
Angioedema with initially isolated voice change
Persistent hoarseness as malignancy or vocal fold paralysis indicator
Differential Diagnosis
Life-Threatening and Time-Critical
High-acuity diagnoses
Epiglottitis (ICD-10 J05.1)
Fever
Drooling
Stridor
Deep neck space infection
Peritonsillar abscess (ICD-10 J36)
Retropharyngeal abscess (ICD-10 J39.0)
Ludwig angina (ICD-10 K12.2)
Angioedema (ICD-10 T78.3)
Lip or tongue swelling
Urticaria absent possible
Foreign body (ICD-10 T17)
Sudden onset after choking
Common Mimics and Associated Conditions
Upper airway inflammatory syndromes
Viral URI with dysphonia (ICD-10 J06.9)
Acute pharyngitis (ICD-10 J02.9)
Acute tonsillitis (ICD-10 J03.90)
Croup or acute laryngotracheitis in children (ICD-10 J05.0)
Noninfectious laryngeal causes
Laryngopharyngeal reflux (ICD-10 K21.9)
Vocal fold hemorrhage
Vocal fold nodules or polyps
Muscle tension dysphonia
Neurologic and structural
Vocal fold paralysis
Stroke or brainstem process with dysphonia and dysphagia
Laryngeal malignancy (ICD-10 C32)
Laboratory Tests
Routine Testing Strategy
Testing approach
No routine labs for uncomplicated acute laryngitis
Labs for systemic toxicity or airway-risk phenotype
Focused testing guided by suspected alternative diagnosis
Infectious Workup When Indicated
Targeted infectious tests
Respiratory viral NAAT when result changes management
Influenza testing in high-risk or treatment window
SARS-CoV-2 testing per local policy and risk
Group A streptococcus testing when Centor phenotype present
Fever
Tonsillar exudate
Tender anterior cervical nodes
Absence of cough
CBC for deep neck infection concern
Leukocytosis supportive but non-specific
Normal WBC does not exclude severe infection
Blood cultures for sepsis phenotype
Hypotension
High fever
Rigors
Metabolic and Supportive Labs
Severity-guided supportive labs
Basic metabolic panel for dehydration
Creatinine trend for volume status
Electrolytes for vomiting or poor intake
Venous blood gas for severe respiratory distress
Hypercapnia as fatigue marker
Interpretation limited in upper airway obstruction
Diagnostic Tests
Scoring Systems
Decision support tools
No validated adult acute laryngitis severity score
Red flag pathway for airway-risk symptoms
Persistent dysphonia pathway for laryngeal visualization
Westley croup score for pediatric stridor phenotype
Level of consciousness
Cyanosis
Stridor
Air entry
Retractions
Mild score 2 or less as outpatient typical
Moderate score 3-7 as observation and treatment
Severe score 8 or more as high risk airway escalation
MRI
MRI indications
Suspected malignancy or soft tissue mass when CT non-diagnostic
Suspected skull base or neurologic process with vocal fold paralysis
MRI limitations
Not first-line in acute airway risk
Time and positioning constraints in unstable patients
CT
CT neck with IV contrast
Indications
Deep neck infection concern
Retropharyngeal abscess concern
Ludwig angina concern
Suspected tumor with airway symptoms
Interpretation pearls
Rim-enhancing collection supportive of abscess
Airway narrowing extent estimation
Pitfalls
Early infection without discrete collection
Transfer delays in patients with impending obstruction
CT chest
Indications
Suspected recurrent laryngeal nerve palsy from mediastinal mass
Hemoptysis with malignancy concern
Ultrasound
Point-of-care ultrasound adjuncts
Submandibular and neck soft tissue ultrasound
Cellulitis versus abscess pattern
Guidance for procedural planning support
Lung ultrasound when lower airway component suspected
Alternative cause of dyspnea
Disposition
Discharge Criteria
Safe outpatient profile
No stridor
No drooling
Able to tolerate oral intake
No respiratory distress
No deep neck infection concern
Symptom duration less than 3 weeks without malignancy risk features
Follow-up planning
Primary care follow-up if improving within 48-72 hours
ENT referral if dysphonia persists more than 3 weeks
ENT referral sooner for smokers with persistent dysphonia
Observation or Admission Criteria
Higher level of care triggers
Stridor or increased work of breathing
Dehydration requiring IV fluids
Immunocompromised status with systemic symptoms
Suspected epiglottitis
Suspected deep neck infection
Need for repeated nebulized epinephrine in child with croup phenotype
Transfer criteria
Airway intervention capability needed
ENT or anesthesia support unavailable locally
Treatment
Supportive Care
Symptom relief bundle
Voice relative rest
Avoid whispering as strain risk
Avoid shouting and prolonged talking
Hydration strategy
Oral fluids
Warm fluids as tolerated
Humidification
Cool mist humidifier
Steam exposure with burn risk counseling
Irritant avoidance
Smoking cessation counseling
Vaping cessation counseling
Avoid alcohol excess during acute phase
Analgesia and Antipyretics
Non-opioid analgesia options
Acetaminophen PO
Adult 650 mg every 6 hours as needed
Adult maximum 3000 mg per day typical
Pediatric 15 mg/kg per dose every 4-6 hours as needed
Pediatric maximum 60 mg/kg per day typical
Ibuprofen PO
Adult 400 mg every 6-8 hours as needed
Adult maximum 2400 mg per day typical
Pediatric 10 mg/kg per dose every 6-8 hours as needed
Pediatric maximum 40 mg/kg per day typical
Corticosteroids
Steroid role
Consider for significant laryngeal edema with voice-critical needs
Professional voice user
Severe dysphonia impacting function
Avoid routine use in mild uncomplicated cases
Dexamethasone dosing options
Adults
Dexamethasone PO or IM 10 mg once
If diabetes, hyperglycemia risk counseling
If infection concern for deep neck space, steroids only with appropriate antibiotic plan
Pediatrics with croup phenotype
Dexamethasone PO or IM 0.6 mg/kg once
Maximum 10 mg
Lower-dose regimens 0.15-0.3 mg/kg as alternative by local protocol
Cough and Throat Symptom Adjuncts
Symptomatic adjuncts
Honey for cough in children older than 1 year
Avoid under 1 year due to botulism risk
Throat lozenges
Aspiration risk in young children
Short-term antitussive
Avoid in respiratory compromise
Reflux-Directed Therapy
Reflux suspicion management
Lifestyle measures
No meals within 3 hours of bedtime
Head-of-bed elevation
Avoid trigger foods individualized
Proton pump inhibitor trial when symptoms and exam suggest laryngopharyngeal reflux
Omeprazole PO 20 mg daily
Trial duration 4-8 weeks
Reassess need to continue
Antibiotics
Antibiotic stewardship
No antibiotics for routine viral acute laryngitis
Antibiotics only for suspected bacterial process or specific pathogens
When bacterial laryngitis suspected
Severe systemic symptoms
High fever
Toxic appearance
Focal purulence with concerning course
Immunocompromised host with progressive symptoms
Empiric options when indicated
Amoxicillin-clavulanate PO
Adult 875 mg twice daily for 5-7 days
If penicillin allergy non-anaphylaxis, cephalosporin per local protocol
If anaphylaxis history, alternative class selection
Azithromycin PO
Adult 500 mg day 1
Adult 250 mg daily days 2-5
QT prolongation risk consideration
Suspected diphtheria pathway
Airway precautions and isolation
Droplet precautions
Contact precautions if cutaneous concern
Antitoxin via public health pathway
Erythromycin or penicillin regimen per public health guidance
Airway-Risk Phenotypes
Croup treatment bundle
Nebulized epinephrine for stridor at rest
Racemic epinephrine 2.25% nebulized 0.5 mL
Dilute in 3 mL normal saline
Repeat dosing based on response and observation protocol
L-epinephrine 1 mg/mL nebulized 5 mL as alternative
Observation for rebound symptoms
Escalation criteria
If persistent stridor after epinephrine, admission consideration
If hypoxemia or fatigue, ICU consideration
Special Populations
Pregnancy
Pregnancy considerations
Airway edema physiologic risk
Lower threshold for airway escalation if stridor
Cautious sedation avoidance in airway concern
Medication safety
Acetaminophen preferred first-line
NSAID avoidance in third trimester
Dexamethasone single dose generally acceptable when clinically indicated
Infectious testing
Influenza treatment window and risk stratification as high risk group
Geriatric
Geriatric considerations
Malignancy risk higher with persistent dysphonia
Earlier ENT referral threshold
Medication safety
NSAID renal and GI bleeding risk
Steroid delirium and hyperglycemia risk
Dehydration risk
Lower threshold for IV fluids and observation
Pediatrics
Pediatrics considerations
Croup phenotype common cause of hoarseness and barking cough
Stridor at rest as severity marker
Poor oral intake as dehydration marker
Medication dosing
Weight-based dosing verification
Avoid honey under 1 year
Return precautions emphasis
Stridor
Retractions
Cyanosis
Background
Epidemiology
Epidemiologic framing
Viral URI as most common etiology for acute laryngitis
Typical duration days to 2 weeks
Persistent dysphonia beyond 3 weeks requires evaluation for noninfectious causes
Pathophysiology
Mechanism
Laryngeal mucosal inflammation
Vocal fold edema
Altered vibration leading to hoarseness
Irritant contribution
Smoke and reflux as inflammatory drivers
Airway risk mechanisms in mimics
Supraglottic edema in epiglottitis
Subglottic edema in croup
Therapeutic Considerations
Treatment rationale
Supportive care as mainstay for viral etiology
Antibiotic avoidance to reduce adverse effects and resistance
Steroid use reserved for significant edema or voice-critical needs
Reflux management when clinical pattern supports laryngopharyngeal reflux
Evidence and guideline alignment
Avoid empiric antibiotics in uncomplicated acute laryngitis (consistent across primary care and ENT guidance)
ENT visualization recommended for persistent dysphonia more than 3 weeks or earlier with red flags
Patient Discharge Instructions
copy discharge instructions
Home care
Voice rest with normal speaking volume
Avoid whispering
Drink fluids regularly
Use cool mist humidifier
Avoid smoke and vaping
Acetaminophen or ibuprofen as directed for pain and fever
Expected course
Hoarseness often improves within several days
Full recovery commonly within 1-2 weeks
Return to ED now
Trouble breathing
Noisy breathing or stridor
Drooling
Trouble swallowing or inability to keep fluids down
Blue lips or face
Severe weakness or dehydration
Rapidly worsening symptoms
Follow-up
If hoarseness lasts more than 3 weeks, ENT assessment
Earlier follow-up if smoking history and persistent hoarseness
Earlier follow-up if neck lump, coughing blood, or weight loss
References
Guidelines and Evidence Summaries
Reference set
Primary care guidance on acute laryngitis emphasizing supportive care and avoiding routine antibiotics
Otolaryngology guidance on dysphonia evaluation and laryngeal visualization for persistent hoarseness
Pediatric croup clinical pathways including dexamethasone and nebulized epinephrine for stridor at rest
Public health guidance for diphtheria evaluation and antitoxin access pathways
Coding and Terminology
Coding anchors
ICD-10 J04.0 acute laryngitis
ICD-10 J05.0 acute obstructive laryngitis (croup)
ICD-10 J05.1 acute epiglottitis
ICD-10 J36 peritonsillar abscess
ICD-10 J39.0 retropharyngeal and parapharyngeal abscess
ICD-10 T78.3 angioedema
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.