Supraglottic Airway Device to Improve Ventilation Success and Reduce Pulmonary Aspiration during Cardio-Pulmonary...

Area of Science:

• Emergency Medicine
• Anesthesiology
• Critical Care

Background:

• Effective airway management is crucial during cardiopulmonary resuscitation (CPR) to prevent gastric content aspiration.
• While endotracheal intubation is standard, supraglottic airway devices (SGA) offer an alternative with potentially simpler training.
• Bag-mask ventilation (BMV) is widely used but may have limitations in ventilation success and airway protection.

Purpose of the Study:

• To evaluate the efficacy of supraglottic airway devices (SGA) compared to bag-mask ventilation (BMV) in first responders during CPR.
• To assess the impact of SGA use on ventilation success rates, intragastric pressure, and pulmonary aspiration.
• To determine if SGA use affects critical CPR metrics.

Main Methods:

• A randomized cross-over trial was conducted on human cadavers using two protocols.
• Protocol A assessed ventilation success, intragastric pressure, and CPR timing with SGA versus BMV.
• Protocol B evaluated pulmonary aspiration using a colored saline solution visualized via bronchoscopy after SGA or BMV use.

Main Results:

• Ventilation success rates were significantly higher with SGA (75.0%) compared to BMV (34.7%) (p=0.003).
• Intragastric pressure was lower with SGA (2.21 mmHg) than BMV (3.02 mmHg) (p=0.02).
• Pulmonary aspiration occurred in 20% of SGA procedures versus 50% of BMV procedures, though this difference was not statistically significant (p=0.44).

Conclusions:

• Supraglottic airway devices (SGA) improve ventilation success and reduce intragastric pressure during CPR.
• SGA use by basic life support rescuers is feasible and efficient for airway management.
• Further research may be warranted to confirm the reduction in aspiration rates with SGA devices.