Annals of emergency medicine
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[Vinson DR: Superstitions in medicine: bad luck or bad logic? Ann Emerg Med May 1998;31:650-652.].
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Comparative Study
Ventilatory strategies affect gas exchange in a pig model of closed-chest cardiac compression.
To identify the arterial and mixed venous blood gas changes caused by different ventilatory strategies during resuscitation from ventricular fibrillation in a pig model of closed-chest cardiac compression. ⋯ This study indicates that passive air movement during chest compression does not allow physiologically significant pulmonary gas exchange and that room air ventilation alone is not sufficient to maintain mixed venous PO2.
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To determine whether condensation on the inner surface of the endotracheal tube (vapor trail) is a reliable indicator of intratracheal placement. ⋯ In this model, condensation on the inner surface of the endotracheal tube was common after placement within the esophagus. If these results are confirmed in human studies, the presence of a vapor trial should not be used as a clinical indicator of correct endotracheal tube placement.