Comparison of Ventilation and Cardiac Compressions When Utilizing the Impact Model 730 Automatic Transport Ventilator Versus a Conventional Bag Valve With a Facemask in a Model of Adult Cadiopulmonary Arrest

摘要

The purpose of this investigation was to evaluate the delivery of ventilation and compressions during two person CPR on an instrumented manikin. Basic Life Support was provided by registered nurses using a conventional bag valve mask ventilation or mask ventilation with an automatic transport ventilator, the Impact Model 730 (Impact Instrumentation, Inc., West Caldwell, NJ), that incorporates a metronome to facilitate chest compression timing. Twenty-eight nurses alternated performing 4 minutes of CPR using the BVM or Impact 730 to deliver breaths with a mask while the other performed compressions. Flow, volume and pressure were measured using a pneumotach and pressure transducer and ease of use was measured using a 10 cm visual analog scale. There was no statistical or clinical difference between the actual and recommended tidal lung volume. Ventilation with the bag valve mask resulted in a mean of 137.7 ml of air per breath entering the simulated stomach versus a mean of 14 ml when using the Impact 739. The reduced mask leak likely resulted from the nurse being able to manage the mask with 2 rather than 1 hand and is reflected in the higher ease of use score with the Impact 730.