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The effects of an automatic, low pressure and constant flow ventilation device versus manual ventilation during cardiovascular resuscitation in a porcine model of cardiac arrest.

Abstract：

BACKGROUND:Cardiac arrest is an important cause of mortality. Cardiopulmonary resuscitation (CPR) improves survival, however, delivery of effective CPR can be challenging and combining effective chest compressions with ventilation, while avoiding over-ventilation is difficult. We hypothesized that ventilation with a pneumatically powered, automatic ventilator (Oxylator(®)) can provide adequate ventilation in a model of cardiac arrest and improve the consistency of ventilations during CPR. METHODS/RESULTS:Twelve pigs (∼40 kg, either sex) underwent 3 episodes each of cardiac arrest and resuscitation consisting of 30s of untreated ventricular fibrillation, followed by 5 min of CPR, defibrillation, and ∼30 min of recovery. During CPR in each episode, pigs were ventilated in 1 of 3 ways in random balanced order: manual ventilation using AMBU bag (12 breaths/min), low pressure Oxylator(®) (maximum airway pressure 15 cm H2O with 20 L/min constant flow in automatic mode [Ox15/20]), or high pressure Oxylator(®) (maximum airway pressure 20 cm H2O with 30 L/min constant flow in automatic mode [Ox20/30]). During CPR, both Ox15/20 and Ox20/30 resulted in higher levels of positive end expiratory pressure than manual ventilation. Ox15/20 ventilation also resulted in higher arterial pCO2 than manual ventilation. Ox20/30 ventilation yielded higher arterial pO2 and a lower arterial-alveolar gradient than manual ventilation. All pigs were successfully defibrillated, and no measured haemodynamic variables were different between the groups. CONCLUSION:Ventilation with an automatic ventilation device during CPR is feasible and provides adequate ventilation and comparable haemodynamics when compared to manual bag ventilation.

journal_name

Resuscitation

journal_title

Resuscitation

authors

Hu X,Ramadeen A,Laurent G,So PP,Baig E,Hare GM,Dorian P

doi

10.1016/j.resuscitation.2013.02.017

subject

Has Abstract

pub_date

2013-08-01 00:00:00

pages

1150-5

issue

8

eissn

0300-9572

issn

1873-1570

pii

S0300-9572(13)00143-3

journal_volume

84

pub_type

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