Abstract
Airway, breathing and circulation will continue to be the top priorities of emergency medical care for the foreseeable future. Correction of hypoxia by bag-valve mask ventilation in the prehospital environment is problematic. It is difficult to obtain a mask seal, challenging to assist patients who have increased work of breathing or a clenched jaw, and essentially impossible to use end-tidal carbon dioxide (CO2) as a gauge of ventilation. Bag-valve mask ventilation does not facilitate tracheal suctioning or protect the airway, and it increases the risk of regurgitation by causing gastric insufflation.
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