What are the survival rate, neurological outcome, and overall morbidity in patients resuscitated from cardiac arrest when managed with a laryngeal mask airway (LMA) versus orotracheal intubation (ETI)?

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Last updated: October 8, 2026 • View editorial policy

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Laryngeal Mask Airway vs Endotracheal Intubation in Cardiac Arrest

In settings with low intubation success rates or limited training opportunities, supraglottic airways (SGAs) like the laryngeal mask should be used over endotracheal intubation (ETI), as they demonstrate equivalent or superior survival and neurological outcomes while being faster and more reliably placed. 1, 2

Evidence-Based Recommendation Framework

Primary Decision Point: Provider Experience and System Success Rates

The choice between LMA and ETI fundamentally depends on your system's ETI success rate and provider training level:

For Low ETI Success Rate Settings (<70% first-pass success):

  • Use SGA/LMA as the primary advanced airway 2
  • The AIRWAYS-2 trial (Wang et al.) in systems with 52% ETI success showed SGAs achieved 34% higher survival to discharge (RR 1.34) and 42% better neurological outcomes (RR 1.42) compared to ETI 1, 2
  • LMA placement is significantly faster (approximately 87 seconds quicker than ETI), minimizing chest compression interruptions 3
  • First-attempt success rates are 44% higher with LMA versus ETI 3

For High ETI Success Rate Settings (>90% success):

  • Either SGA or ETI can be used - they perform equivalently 2
  • The CAAM trial (Jabre et al.) with 98% ETI success showed no difference in survival (RR 0.95) or neurological outcomes (RR 0.92) between i-gel SGA and ETI 2

Critical Caveats and Pitfalls

Avoid these common errors:

  1. Do not attempt ETI if your system lacks high success rates - Failed intubation attempts worsen outcomes. More than 2 intubation attempts are associated with poorer ROSC rates (28.6% vs 33.8% with 1-2 attempts) 4

  2. Do not delay chest compressions for airway placement - The 2025 AHA guidelines emphasize that outcomes depend heavily on minimizing interruptions 1

  3. Recognize that short-term benefits may not translate to discharge - While video laryngoscopy with ETI showed improved 72-hour survival (OR 1.34), this did not extend to hospital discharge survival 5

Survival and Neurological Outcome Data

Survival to Hospital Discharge:

  • In optimal ETI settings: No difference between LMA and ETI 2
  • In suboptimal ETI settings: LMA superior by 27-42% 1, 2
  • Overall meta-analysis: No significant mortality difference (RR 1.00) 3

Neurological Outcomes:

  • High ETI success systems: Equivalent outcomes 2
  • Low ETI success systems: 21 more patients per 1000 with good neurological outcome using LMA 2
  • Video laryngoscopy users: 64.7% achieved good CPC scores (1-2) 4

ROSC Rates:

  • LMA: 23-24% 6
  • ETI in optimal settings: 48% 6
  • ETI in suboptimal settings: Similar or worse than LMA 7

Morbidity Profile

LMA demonstrates lower procedural morbidity:

  • 89% reduction in vocal cord injury compared to ETI (RR 0.11) 3
  • Fewer airway trauma complications overall 3
  • However, one Korean study showed worse outcomes with EMT-intermediate placed LMA (OR 0.45 for survival to discharge), suggesting training level matters critically 7

Quality Improvement Requirements

Mandatory system-level actions 2:

  • Implement ongoing quality improvement programs tracking SGA and ETI success rates
  • Provide frequent retraining for ETI providers (Class 1 recommendation)
  • Monitor first-pass success rates and adjust protocols accordingly
  • Track complications and deviations

Special Considerations for In-Hospital Cardiac Arrest

For IHCA, recommendations are extrapolated from out-of-hospital data. Expert providers trained in advanced airways can use either SGA or ETI 2. However, the same principle applies: prioritize immediate CPR and defibrillation over airway placement for witnessed shockable rhythms.

The Bottom Line Algorithm

  1. Assess your system's ETI success rate and provider training level
  2. If <70% success or limited training → Use LMA/SGA
  3. If >90% success with expert providers → Either LMA or ETI acceptable
  4. If uncertain or intermediate → Default to LMA (faster, safer, equivalent outcomes)
  5. Never attempt >2 intubations - switch to SGA
  6. Always prioritize continuous chest compressions over airway placement timing

The 2025 guidelines make clear that there is no universal "best" airway device - the optimal choice depends on matching the intervention to provider capabilities and system characteristics 1. When in doubt, the evidence supports using SGAs in most real-world EMS systems where ETI expertise is not consistently maintained at expert levels.

References

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This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.