What are the EMS guidelines for performing CPR on a trauma patient?

EMS Trauma CPR Guidelines

For trauma patients in cardiac arrest, EMS should prioritize life-saving interventions (LSIs) over traditional CPR, focusing on reversible causes: control external hemorrhage, manage airway with minimal intervention, decompress suspected tension pneumothorax, and consider chest compressions only after these interventions—while avoiding routine epinephrine use. 1

Critical Decision Framework

Initial Assessment & Scene Safety

• Verify scene safety first
• Rapidly identify mechanism and obvious injuries
• Determine if arrest is truly traumatic vs. medical etiology (if unclear, default to standard ACLS) 1

Immediate Contraindications to Resuscitation

Withhold resuscitation attempts for patients with 1:

• Injuries incompatible with life (decapitation, hemicorpectomy, incineration, open skull with extruding brain matter)
• Evidence of prolonged arrest (rigor mortis, dependent lividity, decomposition)
• Valid DNR/DNAR documentation

Priority Intervention Sequence (NOT Standard CPR)

The trauma-specific approach differs fundamentally from medical cardiac arrest 1:

1. External Hemorrhage Control (FIRST priority)

   • Direct pressure
   • Wound packing
   • Tourniquets for extremity hemorrhage

2. Airway Management (SECOND priority)

   • Use least-invasive approach necessary
   • Maintain patency, oxygenation, adequate ventilation
   • Avoid aggressive intubation attempts that delay transport

3. Chest Decompression (THIRD priority)

   • Only if clinical concern for tension pneumothorax
   • Do NOT perform empiric bilateral decompression without suspected chest trauma 1

4. Chest Compressions (FOURTH priority)

   • Consider only AFTER above LSIs completed
   • Standard rate 100-120/min, depth ≥2 inches (adults) 2
   • Compression:ventilation ratio 30:2 (single rescuer) or 15:2 (two rescuers for pediatrics) 3

5. Epinephrine

   • Should NOT be routinely used 1
   • If used at all, only AFTER other LSIs performed
   • This contrasts sharply with medical cardiac arrest protocols

Monitoring & Adjuncts

Cardiac monitors and POCUS should occur AFTER indicated LSIs 1:

• POCUS showing no cardiac motion may aid prognostication
• Electrical rhythm alone should NOT determine discontinuation of efforts
• Non-shockable rhythms (PEA/asystole) associated with extremely low survival but not absolute contraindication 1

Transport Decision-Making

Factors Favoring Immediate Transport

• Reversible causes identified (hemorrhage, airway obstruction, tension pneumothorax)
• Signs of life present or recently lost
• Proximity to trauma center with appropriate capabilities
• Witnessed arrest with short down-time 4, 5

Predictors of Poor Outcome

Research evidence shows 4, 5:

• Prolonged transport time (significant negative predictor)
• High injury severity score
• Blunt mechanism with motor vehicle collision (worse than falls)
• Penetrating torso trauma (100% mortality in some series)

However, mechanism alone should NOT be sole determinant to discontinue efforts 1

Time Considerations

• No universal standardized time-based cutoffs exist 1
• Decisions should be locally determined based on:
  • EMS system resources
  • Trauma system capabilities
  • Proximity to definitive care
  • Scene safety for providers

Critical Nuances & Pitfalls

Common Errors to Avoid

1. Applying standard ACLS protocols reflexively - Trauma arrest requires different priorities 1
2. Delaying transport for prolonged resuscitation - Transport time is critical predictor 4
3. Empiric bilateral chest decompression - Only indicated with suspected chest trauma 1
4. Early epinephrine administration - Should be last consideration, not first 1
5. Using electrical rhythm as sole prognostic indicator - PEA/asystole patients can survive 1, 6

Evidence Conflicts & Resolution

The 2025 NAEMSP/ACS-COT/ACEP position statement 1 represents the most current trauma-specific guidance and supersedes general AHA CPR algorithms 2 for trauma patients. While AHA guidelines emphasize immediate chest compressions for cardiac arrest, trauma arrest requires addressing reversible causes first.

Research shows 7-29% ROSC rates and 2-7% survival with good neurological outcome in trauma arrest 4, 6, supporting aggressive intervention when appropriate—but only with trauma-specific protocols.

Special Populations

• Pediatric trauma arrest: Follow same LSI priority sequence, adjust compression:ventilation ratios (15:2 with two rescuers) 3
• Penetrating trauma: Higher survival potential than blunt mechanism 4
• Witnessed collapse: More favorable prognosis, lower threshold for resuscitation 5

System-Level Considerations

EMS medical directors must establish local protocols considering 1:

• Regional trauma center capabilities
• Transport times and geography
• EMS provider training and scope of practice
• Public and provider safety risks
• Active trauma system stakeholder collaboration

Human and organ donation considerations should NOT factor into on-scene EMS decision-making 1.