Browse categories and answer follow-up questions to refine your symptom profile.
History
Event context
Aspiration circumstances
Witnessed aspiration
Unwitnessed found down with emesis
During eating or drinking
During seizure
During intoxication
During procedural sedation or anesthesia
Near drowning
Material and volume
Aspirated contents characterization
Gastric contents
Food particulate
Pill aspiration
Blood
Hydrocarbon or caustic ingestion aspiration
Time course and trajectory
Timeline pattern
Immediate coughing or choking
Immediate hypoxemia within hours
Delayed fever or sputum after 24 to 72 hours
Progressive respiratory distress over hours
Symptoms and functional impact
Symptom profile
Dyspnea
Cough
Wheeze
Chest pain pleuritic
Hemoptysis
Voice change
Dysphagia
Inability to tolerate secretions
Associated symptoms
Associated symptoms
Fever or rigors
Altered mental status
Vomiting
Aspiration risk symptoms
Dysphagia
Reflux symptoms
Recurrent choking with meals
Alarm Features
Airway and breathing threats
Immediate life threats
Stridor
Silent chest
Severe work of breathing
Inability to protect airway
Copious secretions
Cyanosis
Vital sign danger thresholds
Dangerous physiology
SpO2 less than 90 percent on room air
Respiratory rate 30 or higher
Systolic blood pressure less than 90 mmHg
New confusion or GCS less than 13
Temperature 40 C or higher
High risk historical triggers
High risk triggers
Depressed level of consciousness
Seizure or status epilepticus
Massive emesis or GI bleeding
Known esophageal obstruction
Caustic ingestion
Escalation triggers
Escalate immediately if
Rapidly increasing oxygen requirement
Rising PaCO2 on blood gas
Exhaustion with declining mental status
Hemodynamic instability or sepsis physiology
Medications
Current and recent exposures
Medication contributors
Sedatives
Opioids
Alcohol co exposure
Antipsychotics
Anticholinergics
Recent anesthesia
Aspiration related therapies and traps
Antibiotic considerations
Recent antibiotics within 90 days
Prior MRSA infection or colonization
Prior resistant gram negative infection
Severe beta lactam allergy history
Anticoagulation and bleeding
Bleeding risk modifiers
DOAC use
Warfarin use
Antiplatelet therapy
Diet
Intake and aspiration context
Recent intake context
Eating or drinking immediately before event
Large meal
Alcohol intake
Tube feeding
Reflux and swallowing pattern
Aspiration prone diet factors
Poor dentition
Dysphagia with solids
Dysphagia with liquids
Reflux symptoms
Post prandial cough
Review of Systems
Respiratory
Pulmonary symptoms
Shortness of breath
Cough
Sputum purulence
Wheeze
Pleurodynia
Infectious and systemic
Infection and inflammation
Fever
Rigors
Myalgias
Malaise
Neurologic and aspiration drivers
Neuro related
Seizure activity
Stroke symptoms
Bulbar symptoms
Syncope or overdose symptoms
GI and airway protection
GI related
Vomiting
Hematemesis
Dysphagia
Odynophagia
Reflux symptoms
Collateral History and Family History
Collateral and baseline
Collateral source
Witness report
EMS report
Caregiver report
Facility notes
Family history relevant to presentation
Heritable risks
Neuromuscular disorders
Early stroke
Sudden cardiac death
Exposure context
Household and environment
Sick contacts
Aspiration outbreaks in facility
Smoke exposure
Risk Factors
Aspiration predisposition
Aspiration risk factors
Dysphagia
Prior aspiration events
Stroke history
Dementia
Parkinson disease (G20)
Neuromuscular disease
Esophageal disease
GERD history
Impaired airway protection
Airway protection impairment
Altered mental status
Intoxication
Sedation
Seizure disorder (G40)
Infection and severe disease risk
Complication risk
COPD (J44.9)
CHF (I50.9)
Diabetes mellitus (E11.9)
Chronic kidney disease (N18.9)
Immunocompromised state
Special populations
Population modifiers
Pregnancy
Frailty
Long term care resident
Recent hospitalization within 90 days
Differential Diagnosis
Life threatening
Cannot miss
Foreign body airway obstruction
Sudden choking with focal wheeze
Unilateral decreased breath sounds
Aspiration with impending respiratory failure
Rapidly rising oxygen requirement
Hypercapnia on blood gas
ARDS (J80)
Bilateral infiltrates
Severe hypoxemia
Pulmonary embolism (I26.99)
Pleuritic pain out of proportion
Unexplained tachycardia
Acute cardiogenic pulmonary edema (I50.1)
Diffuse B lines
S3 or elevated JVP
Common
Likely diagnoses
Aspiration pneumonitis
Abrupt onset after witnessed aspiration
Often afebrile early
Aspiration pneumonia (J69.0)
Subacute course
Fever and purulent sputum
Community acquired pneumonia (J18.9)
Prodrome
No clear aspiration event
Asthma or COPD exacerbation (J45.901, J44.1)
Wheeze
Bronchodilator response
Less common and mimics
Other considerations
Chemical pneumonitis
Hydrocarbon exposure
Severe hypoxemia early
Negative pressure pulmonary edema
Post obstruction event
Frothy sputum
Pulmonary contusion
Trauma mechanism
Delayed radiographic changes
Past Medical History
Relevant comorbidities
Chronic disease context
Prior aspiration pneumonia (J69.0)
Dysphagia workup history
Prior intubations
Chronic lung disease
Procedures and devices
Devices and procedures
Feeding tube
Tracheostomy
Recent endoscopy
Recent surgery with anesthesia
Baseline function
Baseline status
Mobility level
Cognitive baseline
Baseline oxygen requirement
Physical Exam
General and vital sign pattern
Initial impression
Toxic appearance
Work of breathing
Ability to speak full sentences
Hydration and perfusion
Airway and upper aerodigestive
Airway focused exam
Stridor
Voice change
Drooling
Visible emesis in oropharynx
Dentition
Respiratory
Chest exam
Focal wheeze
Diffuse wheeze
Crackles
Rhonchi
Unilateral decreased breath sounds
Asymmetric chest rise
Cardiovascular and perfusion
Hemodynamic findings
Tachycardia
Hypotension
Elevated JVP
Peripheral edema
Neurologic and aspiration drivers
Neuro exam
GCS trend
Focal deficits
Bulbar weakness
Gag reflex context dependent
Lab Studies
Core labs by severity
Baseline assessment
CBC
Electrolytes and renal function
Glucose
Liver enzymes if toxic ingestion concern
Sepsis and organ dysfunction
If infection or shock concern
Lactate
Blood cultures before antibiotics when feasible
Procalcitonin local protocol dependent
Gas exchange and ventilation
Oxygenation and ventilation assessment
VBG for pH and PaCO2 trend
ABG if severe hypoxemia or ventilation concern
Microbiology
When pneumonia suspected
Sputum culture if intubated or severe disease
Viral testing local protocol dependent
Imaging
Scoring Systems
Severity and disposition tools
CURB 65 for pneumonia severity
PSI pneumonia severity index
Use limitation
Not validated to distinguish aspiration pneumonitis vs pneumonia
Use with clinical judgement and oxygenation trajectory
MRI
MRI role
Not routine for aspiration lung disease
Consider if alternate diagnosis requiring MRI
Brain MRI for stroke with dysphagia
Spine MRI for neuromuscular concern
CT
CT chest considerations
If severe disease with unclear diagnosis
If suspected foreign body or obstructing lesion
If complication concern
Abscess
Empyema
Contrast cautions
Renal impairment
Pregnancy risk benefit
Ultrasound
Lung ultrasound and POCUS
B lines and consolidations
Pleural effusion assessment
Cardiac POCUS for shock phenotype
Special Tests
Bedside and procedural diagnostics
Airway and aspiration specific tests
Flexible nasopharyngolaryngoscopy if stridor or upper airway concern
Bronchoscopy if suspected particulate aspiration with persistent obstruction
Swallow evaluation planning
Dysphagia assessment pathway
Speech language pathology evaluation inpatient
Modified barium swallow outpatient or inpatient as appropriate
Oxygenation monitoring
Monitoring adjuncts
Continuous pulse oximetry
Capnography if sedation or hypoventilation risk
ECG
Indications and patterns
ECG utility
Hypoxia related tachyarrhythmia
Sepsis related myocardial stress
Chest pain or troponin elevation evaluation
High risk findings
Concerning ECG findings
New ischemic changes
Atrial fibrillation with RVR
Ventricular arrhythmia
QT prolongation with medication exposures
Assessment
Syndrome classification
Working categories
Aspiration pneumonitis
Abrupt onset after witnessed event
Radiographic infiltrate possible within hours
Aspiration pneumonia (J69.0)
Delayed onset fever or purulence
Persistent symptoms beyond 48 hours
Obstructive aspiration event
Focal wheeze
Unilateral atelectasis
Severity stratification
Severity features
Oxygen requirement level
Ventilatory failure
Hemodynamic instability
Altered mental status
Complications to rule out
Complications
Lung abscess
Empyema
ARDS (J80)
Sepsis (A41.9)
Plan
First 5 minutes
Immediate stabilization
Escalate to resuscitation bay if severe hypoxemia or declining mental status
Continuous monitoring
SpO2
Cardiac monitor
Blood pressure cycling
IV access
Two large bore peripheral IV if unstable
Intraosseous if no access and crashing
Oxygen strategy
Nasal cannula to target SpO2 92 to 96 percent
COPD hypercapnia risk target SpO2 88 to 92 percent
Airway protection
If GCS less than 8 or inability to clear secretions, prepare for intubation
Suction ready and positioned
Respiratory support escalation
Oxygen and ventilation escalation
High flow nasal cannula if persistent hypoxemia
NIV with caution
Avoid if ongoing emesis
Avoid if unable to protect airway
Intubation triggers
Refractory hypoxemia
Rising PaCO2 with acidosis
Exhaustion or altered mental status
Antibiotics and when not to
Antimicrobials decision logic
Aspiration pneumonitis without infection features
Supportive care
No prophylactic antibiotics
Aspiration pneumonia suspected
Treat similar to CAP or HAP based on setting
Anaerobic coverage not routine unless abscess or empyema
Example adult regimens local protocol dependent
CAP pattern without MRSA or Pseudomonas risks
Ampicillin sulbactam IV 3 g every 6 hours
Ceftriaxone IV 2 g daily plus azithromycin IV or PO 500 mg daily
Severe beta lactam allergy
Levofloxacin IV or PO 750 mg daily
Add clindamycin only if abscess or empyema concern
MRSA risk factors
Add vancomycin IV 15 to 20 mg per kg every 8 to 12 hours
Or linezolid IV or PO 600 mg every 12 hours
Pseudomonas risk factors
Piperacillin tazobactam IV 4.5 g every 6 hours
Or cefepime IV 2 g every 8 hours
Supportive care and adjuncts
Symptom and complication control
Bronchodilator trial for wheeze
Salbutamol inhaled 4 to 8 puffs via MDI with spacer
Or nebulized salbutamol 5 mg
Antipyretic
Acetaminophen PO or PR 650 to 1000 mg every 6 hours
Maximum 4000 mg per day adult
Fluids for hypoperfusion
Balanced crystalloid 10 to 20 mL per kg bolus with reassessment
Dynamic reassessment preferred
Reassessment loop
Reassessment timing
Recheck vitals and work of breathing every 15 to 30 minutes until stable
Repeat lung exam after interventions
Repeat blood gas if ventilation concern and clinical worsening
Repeat imaging if deterioration or complication concern
Consults
Consultation triggers
ICU if escalating oxygen support or shock physiology
Anesthesia or airway team if difficult airway risk
Pulmonology for bronchoscopy consideration
Speech language pathology for dysphagia and aspiration prevention
Toxicology if caustic or hydrocarbon exposure
Disposition
ICU
ICU criteria
Intubation or imminent intubation
High flow nasal cannula with rising requirement
NIV with close monitoring needs
Shock requiring vasopressor
Severe acidosis or hypercapnia
Inpatient or observation
Admission or observation considerations
New oxygen requirement
Persistent tachypnea
Fever with radiographic pneumonia
Frailty or poor oral intake
Unsafe swallow or aspiration recurrence risk
Discharge
Discharge criteria
Stable SpO2 on room air or baseline oxygen
Normalizing respiratory rate
No ongoing vomiting
Reliable supervision and return precautions understanding
Follow up plan feasible within 24 to 72 hours
Discharge Instructions
Copy discharge instructions
Summary
You had breathing symptoms after something went into your airway
Your oxygen level and breathing remained stable for discharge
Medicines
Take prescribed antibiotics only if given
Avoid alcohol or sedating medicines unless prescribed
Activity
Sleep with head elevated
Small sips and small bites if swallowing is difficult
Follow up
Primary care or clinic follow up in 24 to 72 hours
Swallow assessment referral if choking episodes continue
Return to ED now for
Worsening shortness of breath
SpO2 less than 92 percent if you have a home oximeter
Fever or shaking chills
Chest pain
Blue lips or severe drowsiness
Repeated vomiting or inability to keep fluids down
References
Guidelines and key sources
British Thoracic Society
BTS Clinical Statement on aspiration pneumonia 2023
Thorax publication supplement 2023
American Thoracic Society and Infectious Diseases Society of America
Diagnosis and Treatment of Adults with Community acquired Pneumonia guideline 2019
Infectious Diseases Society of America and American Thoracic Society
Hospital acquired and ventilator associated pneumonia guideline 2016
Surviving Sepsis Campaign
International Guidelines for Management of Sepsis and Septic Shock 2021
Evidence summaries
Merck Manual Professional Edition aspiration pneumonitis and pneumonia updated 2024
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.