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Approach to the Critical Patient
Immediate priorities
Airway and resuscitation priorities
High risk upper airway obstruction
Immediate airway team activation for stridor or drooling or tripod or voice change
If significant distress, resuscitation bay and continuous observation
Oxygenation and ventilation support
Supplemental oxygen to maintain SpO2 per local targets
Bag mask ventilation readiness with 2 person technique
Positioning and agitation minimization
Upright position of comfort
Avoid forced supine positioning
Monitoring and access
Continuous pulse oximetry and ECG
Two large bore IV lines if tolerated
Airway strategy
Controlled airway plan
Primary plan
Awake airway approach when feasible
Fiberoptic intubation option when expertise available
Backup plans
Video laryngoscopy readiness with smaller tubes
Supraglottic airway as rescue bridge only
Surgical airway readiness
If cannot intubate and cannot oxygenate, immediate cricothyrotomy
ENT for tracheostomy consideration when time allows
Hemodynamic and sepsis considerations
Shock and sepsis framework
Septic physiology triggers
Hypotension or altered mental status or lactate elevation
Early antimicrobials and fluids
Initiate antibiotics immediately after airway stabilization priority
If hypotension, crystalloid bolus per sepsis protocols
PITFALLS
Common failure modes
Delays from imaging or throat examination attempts
If unstable airway, defer CT and defer throat manipulation
Under-triage in adults
Severe odynophagia with minimal oropharyngeal findings as high risk pattern
History
Presentation pattern
Symptom onset and tempo
Rapid progression over hours
Sudden severe sore throat
Rapidly worsening dysphagia
Prodrome variability
Viral prodrome possible in adults
Abrupt high fever more typical in bacterial cases
Key symptoms
Upper airway obstruction symptoms
Stridor
Inspiratory stridor
Stridor at rest as severe marker
Drooling
Inability to handle secretions
Spitting secretions
Voice change
Muffled hot potato voice
Weak voice
Dyspnea
Orthopnea
Tripod posture
Pain dominant symptoms
Odynophagia
Severe pain out of proportion to oropharyngeal exam
Dysphagia
Solid then liquid intolerance
Risk factors and exposures
Infectious risks
Incomplete Hib immunization
Unvaccinated or under-vaccinated child
Diabetes or immunocompromise
Higher risk severe infection
Recent upper respiratory infection
Preceding viral illness
Noninfectious triggers
Thermal injury
Hot food or beverage
Caustic exposure
Inhalational irritants
Foreign body
Choking episode
Red flags for imminent obstruction
High risk history features
Rapid progression within hours
Worsening dyspnea
Increasing drooling
Prior difficult airway
Previous intubation difficulty
Head and neck surgery history
Physical Exam
General and airway appearance
Work of breathing and posture
Tripod or sniffing posture
Leaning forward
Neck extension
Accessory muscle use
Suprasternal retractions
Tachypnea
Voice and secretion control
Muffled voice
Inability to phonate normally
Quiet voice due to pain
Drooling
Pooling secretions
Frequent spitting
Vital signs and perfusion
Physiologic severity markers
Fever
High temperature supports bacterial cause
Tachycardia
Pain and fever contribution
Hypotension
Sepsis concern
Head and neck exam
Oropharynx and neck findings
Minimal oropharyngeal findings
Normal appearing tonsils despite severe pain
Neck tenderness
Anterior neck pain
Trismus
Alternative deep space infection consideration
Lung and stridor characterization
Upper airway sounds
Inspiratory stridor
Stridor at rest severity marker
Reduced air entry
Impending obstruction signal
PITFALLS
Exam hazards
Tongue depressor attempts in unstable child
If significant distress, avoid oropharyngeal manipulation
Sedation without airway control
If agitation severe, airway team present before sedatives
Differential Diagnosis
Life threatening mimics
Immediate life threats
Anaphylaxis and angioedema
Urticaria or lip tongue swelling
Rapid swelling after exposure
Foreign body aspiration
Sudden onset choking
Unilateral wheeze or air trapping
Retropharyngeal abscess
Neck stiffness
Limited neck extension
Ludwig angina
Floor of mouth swelling
Dental source
Bacterial tracheitis
Toxic appearance
Thick secretions
Common upper airway conditions
Infectious upper airway diagnoses
Croup
Barky cough
Viral prodrome
Peritonsillar abscess
Uvular deviation
Trismus
Tonsillitis and pharyngitis
Exudates
Tender anterior cervical nodes
Coding alignment
ICD-10 candidates
J05.1 acute epiglottitis
T78.3 angioneurotic edema
T78.2 anaphylactic shock
J05.0 acute obstructive laryngitis croup
SNOMED CT concept alignment
Acute epiglottitis concept term
Supraglottitis concept term
Acute upper airway obstruction concept term
Laboratory Tests
Core labs in moderate to severe presentations
Infection and physiology labs
Complete blood count for bacterial infection support
Leukocytosis supportive but nonspecific
Normal CBC does not exclude
Basic metabolic panel for dehydration and renal function
Renal function for antibiotic dosing
Electrolyte derangements from poor intake
Venous blood gas for ventilation concern
Rising CO2 as impending failure marker
Acidosis as severity marker
Serum lactate for sepsis physiology
Elevated lactate supports hypoperfusion
Trend response to resuscitation
Microbiology
Culture strategy
Blood cultures in toxic or febrile or immunocompromised
Two sets prior to antibiotics when feasible
Do not delay antibiotics for cultures
Epiglottic culture
If secured airway and visualization in controlled setting
OR or ICU setting preferred
Point of care testing
Bedside tests
Glucose in altered mental status
Hypoglycemia exclusion
Hyperglycemia in diabetes and sepsis
Pregnancy test when relevant
Medication and imaging planning
Radiation risk framing
PITFALLS
Lab limitations
Throat swabs not helpful for epiglottitis diagnosis
Oropharyngeal swab may miss causative organism
Swabbing may provoke agitation
Diagnostic Tests
Scoring Systems
Airway risk stratification tools
Airway difficulty predictors
Limited mouth opening and neck mobility
History of difficult intubation
Pediatric respiratory distress severity concepts
Stridor at rest
Retractions and agitation
Clinical decision principle
If signs of impending obstruction, prioritize airway control over diagnostic confirmation
MRI
MRI role
Limited acute utility
Time and sedation requirements
Not first line in unstable airway
Deep neck space complication evaluation when stable
Abscess extension assessment
Soft tissue characterization
CT
CT neck with IV contrast
Indications in stable airway
Uncertain diagnosis after clinical evaluation
Suspected deep neck infection complication
Contraindications and cautions
Unstable airway or inability to lie flat
Transport risk without airway control
Key CT findings
Enlarged edematous epiglottis and aryepiglottic folds
Supraglottic airway narrowing
Guideline style evidence note
Imaging should not delay airway stabilization in high risk presentations
Ultrasound (or US)
Point of care ultrasound options
Anterior neck airway ultrasound
Epiglottic thickening measurement concept
Supraglottic edema appearance concept
Procedural planning ultrasound
Cricothyroid membrane identification
Tracheal midline identification
Limitations
Operator dependence
Do not use to delay definitive airway management
Plain radiography adjunct
Lateral neck radiograph
Stable patient adjunct only
Thumb sign concept
Vallecular effacement concept
Limitations
Normal radiograph does not exclude
Positioning may worsen obstruction
Disposition
Level of care
Admission standards
ICU level monitoring
Any stridor at rest
Any drooling or inability to swallow
Any oxygen requirement
Stepdown or ward criteria
Mild symptoms with stable airway after specialist evaluation
Rapid access to airway rescue resources
Airway secured pathway
Post intubation disposition
ICU admission
Ventilator management and sedation
Extubation planning with ENT and anesthesia
Repeat airway assessment plan
Cuff leak assessment considerations
Endoscopic reassessment considerations
Transfer criteria
Higher level of care transfer
No ENT or anesthesia airway capability onsite
Stabilize airway before transfer when feasible
Critical care transport requirements
Pediatric center transfer needs
Pediatric anesthesia and ICU availability
Pediatric ENT availability
Discharge rare pathway
Discharge only when low risk after specialist evaluation
No stridor
Normal work of breathing
Normal oxygen saturation on room air
Oral intake adequate
No drooling
Able to swallow liquids
Reliable follow up
Return precautions understood
Next day reassessment access
Treatment
Airway and respiratory support
Airway management framework
Noninvasive measures while preparing airway
Humidified oxygen
Upright positioning
Intubation approach
Awake fiberoptic technique when feasible
Small endotracheal tube selection
0.5 to 1.0 mm smaller internal diameter than age based estimate in children
Backup tube sizes available
Rescue oxygenation
Bag mask ventilation readiness
Supraglottic airway as temporary rescue
Surgical airway
If cannot intubate and cannot oxygenate, immediate cricothyrotomy
ENT tracheostomy if time and anatomy permit
Antibiotics
Empiric antimicrobial coverage
Target organisms
Haemophilus influenzae
Streptococcus species
Staphylococcus aureus including MRSA risk groups
First line regimens
Ceftriaxone IV 2 g daily adult
Pediatric ceftriaxone IV 50 mg/kg daily
Maximum 2 g daily
Cefotaxime IV 2 g every 6 to 8 hours adult
Pediatric cefotaxime IV 50 mg/kg every 6 hours
Maximum per local pediatric dosing limits
MRSA coverage when indicated
Vancomycin IV weight based dosing per local protocol
Therapeutic drug monitoring plan
Renal dosing adjustments
Clindamycin IV 600 to 900 mg every 8 hours adult as alternative
Pediatric clindamycin IV 10 mg/kg every 8 hours
Maximum 900 mg per dose
Beta lactam allergy options
Levofloxacin IV 750 mg daily adult
Pediatric fluoroquinolone use only with specialist input
Tendinopathy and QT risk counseling considerations
Steroids and adjuncts
Anti-inflammatory therapy
Dexamethasone IV 10 mg adult
Pediatric dexamethasone IV 0.6 mg/kg
Maximum 10 mg
Evidence framing
Steroids commonly used to reduce airway edema
Benefit signal mainly from observational practice patterns
Nebulized therapies
Racemic epinephrine as bridge in severe stridor
Use only with airway team immediately available
Rebound monitoring requirement
Heliox as temporizing measure
Consider when severe obstruction and awaiting definitive airway
Requires appropriate delivery system
Supportive care
Analgesia and antipyresis
Acetaminophen dosing per weight
Avoid oversedation
Improve cooperation and reduce distress
Opioids only with airway oversight
Risk of hypoventilation
Prefer titrated small doses if required
Fluids and nutrition
IV fluids for poor intake
Dehydration correction
Maintenance fluids while NPO
NPO until airway stable
Aspiration risk
Planned airway procedures
Post exposure prophylaxis
Hib household and close contact prophylaxis
Rifampin prophylaxis pathway when Hib confirmed or strongly suspected
Public health notification process
Immunization status review for contacts
Evidence levels and guideline style notes
Recommendation strength framework
Class I style recommendation for early airway team involvement in impending obstruction
Supported by airway safety consensus
Time critical risk mitigation
Class IIa style recommendation for third generation cephalosporin empiric therapy
Broad pathogen coverage
Favorable safety profile
Special Populations
Pregnancy
Pregnancy considerations
Physiologic airway changes
Increased mucosal edema
Reduced functional residual capacity
Medication considerations
Beta lactams and cephalosporins generally acceptable
Avoid unnecessary sedatives
Imaging considerations
Prefer bedside and clinical diagnosis when possible
If CT necessary, shielding and risk benefit framing
Geriatric
Older adult considerations
Atypical presentations
Less fever
Pain dominant complaints without overt distress early
Comorbidity risks
Diabetes and immunosuppression
Higher risk sepsis and complications
Medication safety
Renal dosing for antibiotics
Delirium risk with sedatives
Pediatrics
Pediatric specific approach
High agitation risk
Caregiver presence
Minimal interventions until airway plan ready
Airway planning
Pediatric anesthesia and ENT involvement early
Smaller tube sizing plan
Immunization context
Hib vaccine status review
Public health notification considerations
Background
Epidemiology
Population patterns
Hib vaccine era shift
Reduced pediatric Hib epiglottitis incidence
Adult cases remain clinically important
Common pathogen spectrum
Haemophilus influenzae
Streptococcus species
Staphylococcus aureus
Risk group enrichment
Diabetes
Immunocompromise
Pathophysiology
Mechanism and anatomy
Supraglottic infection and inflammation
Epiglottic edema
Aryepiglottic fold edema
Airway obstruction physiology
Rapid luminal narrowing
Dynamic collapse with negative inspiratory pressure
Complication pathways
Abscess formation
Bacteremia and sepsis
Therapeutic Considerations
Why therapies work
Airway first principle
Obstruction can progress abruptly
Definitive airway prevents sudden arrest
Antibiotic selection rationale
Third generation cephalosporin coverage for Hib and streptococci
MRSA coverage based on local prevalence and risk factors
Steroid rationale
Reduce inflammatory edema
Potentially shorten time to extubation
Extubation timing concept
Resolution of edema over 24 to 72 hours in many cases
Endoscopic reassessment increases safety
Patient Discharge Instructions
copy discharge instructions
Discharge instructions for rare outpatient pathway
Medication adherence
Complete full antibiotic course if prescribed
Avoid missed doses
Hydration and diet
Frequent small sips of fluids
Soft foods as tolerated
Return to ER immediately
Any breathing difficulty
Any stridor or noisy breathing
Drooling or inability to swallow
Worsening throat pain
Voice change
Fever persistence beyond 48 hours on antibiotics
Follow up
ENT or primary care reassessment within 24 hours
Immunization review for Hib if not up to date
References
Clinical guidelines and evidence sources
Reference set
Pediatric airway and epiglottitis management consensus statements
Emphasis on minimal agitation and controlled airway environment
OR capable setting for unstable pediatric airway
Infectious disease guidance on upper airway bacterial infections
Third generation cephalosporin empiric therapy
MRSA coverage by risk and local patterns
Public health guidance for Hib exposure management
Rifampin prophylaxis for close contacts when indicated
Immunization catch up principles
Internal specification source
Source file citations
Clinical management system generator specification
Checkbox nesting and subsection container requirements applied
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.