Reliable pain control and incentive spirometry performance
Stable imaging and vitals over observation window
Discharge criteria
Discharge suitability
No oxygen requirement at rest and ambulation
Stable SpO2 92% or higher on room air
No increasing respiratory rate trend
Pain controlled on oral regimen
Effective cough and deep breathing
Incentive spirometry participation
No concerning associated injuries
No pneumothorax needing intervention
No uncontrolled bleeding risk
Follow-up plan and return precautions documented
Primary care or trauma clinic follow-up
Clear red flags provided
Treatment
Oxygenation and ventilation strategy
Respiratory support escalation
Supplemental oxygen modalities
Nasal cannula
Flow titration to SpO2 target
Humidification if higher flows
Face mask and non-rebreather
Bridge to definitive therapy if escalating needs
Continuous SpO2 monitoring
High-flow nasal cannula
Hypoxemia with preserved ventilation
Close monitoring for fatigue
Noninvasive ventilation
CPAP for oxygenation failure without contraindications
Initial CPAP 5 to 10 cm H2O
Titration to oxygenation and comfort
BiPAP for combined oxygenation and ventilation support
Contraindications
Hemodynamic instability
Inability to protect airway
Facial trauma preventing seal
Intubation and invasive ventilation
Indications
Refractory hypoxemia
Rising PaCO2 with fatigue
Airway protection requirement
Lung-protective ventilation
Tidal volume 6 mL per kg predicted body weight
Plateau pressure target < 30 cm H2O
Driving pressure minimization strategy
PEEP strategy
Minimum 5 cm H2O
Higher PEEP when recruitable lung and oxygenation failure
Oxygen targets
PaO2 10.7 to 13.3 kPa (80 to 100 mmHg)
SpO2 92% to 96%
Adjuncts for severe hypoxemia
Prone positioning for PaO2 to FiO2 < 150 with ARDS physiology
Early initiation within 24 to 48 hours when criteria met
Team and pressure injury precautions
Neuromuscular blockade for ventilator dyssynchrony
Short course consideration in severe ARDS
Deep sedation and monitoring requirements
Analgesia and pulmonary hygiene
Pain control as respiratory therapy
Multimodal analgesia
Paracetamol 1 g PO or IV every 6 hours
Maximum 4 g per day
Lower maximum in liver disease or low body mass
Ibuprofen 400 mg PO every 6 to 8 hours when no contraindication
Renal risk and bleeding risk consideration
Avoid in significant renal injury or high bleeding risk
Opioid analgesia for moderate to severe pain
Fentanyl IV 25 to 50 micrograms
Repeat every 5 to 10 minutes to effect
Monitoring for hypoventilation
Hydromorphone IV 0.2 to 0.4 mg
Repeat every 10 to 15 minutes to effect
Caution in elderly and renal impairment
Regional techniques when available
Thoracic epidural for severe rib fracture pain
Improved ventilation mechanics potential
Contraindications
Coagulopathy
Spine injury concern
Erector spinae plane block or paravertebral block
Alternative when epidural not feasible
Ultrasound-guided local protocols per service
Pulmonary hygiene bundle
Incentive spirometry
Hourly while awake
Documented volumes and trend
Early mobilization when safe
Upright positioning
Assisted ambulation
Secretion management
Chest physiotherapy when indicated
Suctioning when unable to clear secretions
Fluids, transfusion, and hemodynamics
Lung-friendly resuscitation
Fluid strategy
Avoid liberal crystalloid in isolated contusion
Balanced crystalloids in small boluses for clear hypovolemia
Blood product strategy when hemorrhage present
Massive transfusion protocol activation criteria per trauma system
Hemoglobin trend integration with imaging and exam
Vasopressors when needed after adequate volume assessment
Norepinephrine infusion initiation for persistent hypotension
Starting 0.02 to 0.05 micrograms per kg per minute
Titration to MAP target per patient context
Medications and complication prevention
Infection and thrombosis considerations
Antibiotics
Not routine for uncomplicated pulmonary contusion
Indications
Clinical pneumonia
Aspiration with infection features after observation
Venous thromboembolism prophylaxis
Enoxaparin 30 mg SC every 12 hours when no contraindication
Timing coordinated with bleeding risk and procedures
Renal dosing adjustment as needed
Mechanical prophylaxis when pharmacologic contraindicated
Intermittent pneumatic compression
Early mobilization
Stress ulcer prophylaxis in ventilated ICU patients per unit protocol
Risk based selection
Reassessment for de-escalation
Special Populations
Pregnancy
Pregnancy-specific considerations
Maternal oxygenation priority
Higher oxygen reserve needs for fetal oxygen delivery
Lower threshold for escalation in sustained hypoxemia
Imaging strategy
Chest X-ray acceptable with shielding when needed
CT chest when benefits outweigh risks for major trauma evaluation
Analgesia considerations
Paracetamol preferred baseline agent
NSAID avoidance in later gestation consideration
Fetal assessment triggers
Viable gestation with significant trauma
Obstetric consultation for monitoring plan
Geriatric
Older adult risks
Lower physiologic reserve
Early fatigue and respiratory failure risk
Higher pneumonia risk
Medication sensitivity
Opioid dose reduction and slower titration
Delirium risk with sedatives
Disposition bias toward admission
Lower threshold for monitored bed
Early physiotherapy involvement
Pediatrics
Pediatric adjustments
Presentation differences
More compliant chest wall with significant internal injury despite minimal external findings
Rapid decompensation risk
Oxygenation targets
Age-appropriate respiratory rate interpretation
SpO2 target similar unless specific chronic disease
Analgesia weight-based
Paracetamol 15 mg per kg PO every 6 hours
Maximum per local pediatric guidance
Dosing reconciliation with all sources
Ibuprofen 10 mg per kg PO every 6 to 8 hours when appropriate
Contraindication screening
Hydration status attention
Child protection and safety considerations
Non-accidental trauma consideration when history inconsistent
Social work involvement triggers
Background
Epidemiology
Frequency and association patterns
Common blunt chest trauma injury
Often coexists with rib fractures
Often coexists with pneumothorax or hemothorax
Time course relevance
Worsening gas exchange can peak within 24 to 48 hours
Complication risk increases with contusion burden and age
Pathophysiology
Injury mechanisms
Alveolar hemorrhage and interstitial edema
VQ mismatch and shunt physiology
Decreased lung compliance
Inflammatory cascade contribution
Secondary injury progression over hours
ARDS risk in severe cases
Mechanical factors
Pain splinting leading to atelectasis
Impaired secretion clearance leading to pneumonia
Therapeutic Considerations
Treatment principles and rationale
Supportive care as mainstay
Oxygenation support until edema resolves
Ventilation support when fatigue or shunt severe
Lung-protective ventilation importance
Minimizes ventilator-induced lung injury risk
Improves outcomes in ARDS physiology
Conservative fluid strategy
Reduces pulmonary edema burden
Balances perfusion needs against lung injury
Analgesia as disease-modifying support
Improves tidal volume and cough effectiveness
Reduces atelectasis and secretion retention
Patient Discharge Instructions
Copy discharge instructions
Discharge instructions
Diagnosis explanation
Lung bruise after chest injury
Breathing can worsen over the next 1 to 2 days
Home care
Deep breathing and coughing every hour while awake
Incentive spirometer use if provided
Walk and sit upright often
Pain medicines as prescribed
Return to ED now
Increasing shortness of breath
New chest pain not controlled with medicines
Fainting or severe dizziness
Lips or face turning blue
Coughing up increasing blood
Fever or shaking chills
Confusion or extreme sleepiness
Follow-up
Primary care or trauma follow-up within 24 to 72 hours if ongoing symptoms
Earlier follow-up if oxygen used at home or worsening pain
References
Guidelines and evidence sources
Core sources
ATLS principles for initial trauma assessment and thoracic injury management
Trauma society guidance for blunt chest trauma supportive care and ventilation strategies
ARDS lung-protective ventilation evidence base and Berlin definition framework
Coding and terminology
ICD-10 lung contusion and laceration codes
Contusion of lung, unilateral (S27.321A, S27.322A)
Contusion of lung, bilateral (S27.323A)
SNOMED CT concept alignment
Pulmonary contusion (disorder)
Blunt chest trauma (event)
Build instruction source
Clinical management system specification
SymptomDx is an educational tool for medical professionals. It does not replace clinical judgment. Verify all clinical data and drug dosages with authoritative sources.