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Impact of A Pressure-Responsive Flow-Limiting Valve on Bag–valve–mask Ventilation in an Airway Model

Published online by Cambridge University Press:  21 May 2015

Jonnathan M. Busko  and
Thomas H. Blackwell
Jonnathan M. Busko*
Affiliation:
Department of Emergency Medicine, Carolinas Medical Center, Charlotte, NC
Thomas H. Blackwell
Affiliation:
Department of Emergency Medicine, Carolinas Medical Center, Charlotte, NC
*
Department of Emergency Medicine, Carolinas Medical Center, 1000 Blythe Blvd., Charlotte NC 28203; jbuskomd@yahoo.com

Abstract

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Objective:

Using a simulated airway model, we compared ventilation performance by emergency medical services (EMS) providers using a traditional bag–valve–mask (Easy Grip®) resuscitator to their performance when using a new device, the SMART BAG® resuscitator, which has a pressure-responsive flow-limiting valve.

Methods:

We recruited EMS providers at an EMS educational forum and performed a randomized, non-blinded, prospective crossover comparison of ventilation with 2 devices on a non-intubated simulated airway model. Subjects were instructed to ventilate a Mini Ventilation Training Analyzer® as they would an 85-kg adult patient in respiratory arrest. After being randomized to order of device use, they performed ventilation for 1 minute with each device. Primary outcomes were ventilation rates and peak airway pressures. We also measured average tidal volume, gastric inflation volume, minute ventilation and inspiratory:expiratory (I:E) ratio, and compared our results to the American Heart Association standards (2005 edition).

Results:

We observed statistically significant differences between the SMART BAG® and the traditional bag–valve–mask for respiratory rate (12 v. 14 breaths/min), peak airway pressure (15.6 v. 18.9 cm H2O), gastric inflation (239.6 v. 1598.4 mL), minute ventilation (7980 v. 8775 mL), and I:E ratio (1.3 v. 1.1). Average tidal volume was similar with both devices (679.6 v. 672.2 mL).

Conclusion:

The SMART BAG® provided ventilation performance that was more consistent with American Heart Association guidelines and delivered similar tidal volumes when compared with ventilation with a traditional bag–valve–mask resuscitator.

Keywords

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Type
Original Research • Recherche originale
Information
Canadian Journal of Emergency Medicine , Volume 8 , Issue 3 , May 2006 , pp. 158 - 163
Copyright
Copyright © Canadian Association of Emergency Physicians 2006

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