Resuscitation
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Clinical observations suggest that the assumption of a linear relationship between chest compression pressure and cardiac output may be oversimplified. More complex behaviour may occur when the transmural pressure is large, changing the compliances and resistances in the intra-thoracic vasculature. A fundamental understanding of these compression induced phenomena is required for improving CPR. ⋯ Our data strongly indicate that vascular compliance, especially the ability of vessels to collapse (and potentially the cardiac chambers), can be a central factor in the limited output generated by chest compressions. Just pushing 'harder' or 'faster' is not always better, as an 'optimal' force and frequency may exist. Overly forceful compression can limit blood flow by restricting filling or depleting volume in the cardiac chambers and central great vessels.
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Editorial Comment
CPR training and subsequent performance in real life: the missing link.
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Multicenter Study Comparative Study
A comparison of major trauma patients transported to trauma centres vs. non-trauma centres in metropolitan Perth.
Some major trauma patients in metropolitan Perth (area 5000 km(2)) are initially transported to a secondary hospital (non-trauma centre), rather than directly to a tertiary hospital (trauma centre). They are subsequently transferred to a tertiary hospital. We compared outcomes from these different systems of care. ⋯ There is an equivalent risk of major trauma death in these two systems of care. In our metropolitan area, we were unable to demonstrate a mortality benefit associated with time.
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Comparative Study
Performance and skill retention of intubation by paramedics using seven different airway devices--a manikin study.
Endotracheal intubation (ETI) is the most widespread method for emergency airway management. Several studies reported that ETI requires considerable skill and experience and if performed incorrectly, may result in serious adverse events. Unrecognized tube misplacement or oesophageal intubation is associated with high prehospital morbidity. This study investigates the usability of supraglottic airway devices compared to ETI and the skill retention of 41 previously inexperienced paramedics following training using a manikin model. ⋯ ETI performed by inexperienced paramedics is associated with a low success rate. In contrast, supraglottic airway devices like LMA, LT-D(®), I-Gel(®), Combitube(®) and EasyTube(®) are fast, safe and easy-to-use. Within the limitations of a manikin-study, this study suggests that inexperienced medical staff might benefit from using supraglottic airway devices for emergency airway management.