Potential Maneuvers for Providing Optimal Tidal Volume Using the One-Handed EC Technique

Area of Science:

• Emergency Medicine
• Respiratory Care
• Biomedical Engineering

Background:

• Bag-valve-mask (BVM) ventilation is crucial for manual positive oxygen delivery.
• The EC grip technique is recommended for effective BVM use.
• Uncertainty exists regarding optimal hand placement and pressure for the one-handed EC technique.

Purpose of the Study:

• To identify factors influencing tidal volume (Vt) during one-handed EC grip BVM ventilation.
• To determine the ideal mask-to-face sealing method for optimizing Vt.
• To refine the one-handed EC technique for improved ventilation efficacy.

Main Methods:

• A simulation study using a mechanical lung model was performed.
• The scenario mimicked respiratory arrest.
• Multiple regression analyses were employed to assess influencing factors.

Main Results:

• High peak airway pressure, strong left-side mask adhesion, and weak right/bottom mask adhesion significantly impacted Vt.
• Specific adhesion strengths were identified as critical factors for effective ventilation.
• The left-hand one-handed EC technique's pressure distribution was analyzed.

Conclusions:

• Optimizing mask seal is essential for effective BVM ventilation.
• Applying greater pressure to the left mask area during the one-handed EC technique may improve Vt.
• Further refinement of the one-handed EC technique is suggested for clinical practice.