Minimizing stomach inflation versus optimizing chest compressions.
In a bench model, we evaluated a bag-valve device (Smart Bag MO) with limited maximum inspiratory gas flow developed to reduce the risk of stomach inflation in an unprotected airway. During simulated cardiopulmonary resuscitation with uninterrupted chest compressions, ventilation with the "disabled" Smart Bag MO or an adult self-inflating bag-valve device provided only adequate tidal volumes if inspiratory time was 0.5 s. Ventilation with the "enabled" Smart Bag MO, even in ventilation windows of 0.5 s, provided inadequate tidal volumes during simulated cardiopulmonary resuscitation and would result in hypoventilation in a patient.
Herff
Holger
H
Department of Anesthesiology and Critical Care Medicine, Innsbruck Medical University, Anichstrasse 35, 6020 Innsbruck, Austria. holger.herff@i-med.ac.at
Paal
Peter
P
von Goedecke
Achim
A
Mitterlechner
Thomas
T
Danninger
Thomas
T
Wenzel
Volker
V
D016887:Cardiopulmonary Resuscitation / Q000295:instrumentation / Q000379:methods; D035641:Chest Wall Oscillation / Q000295:instrumentation / Q000379:methods*; D001239:Inhalation / Q000502:physiology; D012123:Pulmonary Ventilation / Q000502:physiology; D012121:Respiration, Artificial / Q000295:instrumentation / Q000379:methods*; D013270:Stomach; D013990:Tidal Volume / Q000502:physiology