Resuscitation
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Our objectives are to describe details of the dispatcher assisted cardiopulmonary resuscitation (CPR) instruction program we implemented during a 12 years study and to provide estimates of the potential number of out-of-hospital cardiac arrests that might benefit from such instruction based on data from the last 77 months. ⋯ In the city of Seattle, some 29.9% of all out-of-hospital cardiac arrest victims who received ACLS had the potential to benefit from dispatcher assisted CPR.
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To determine effective interventional targets for out-of-hospital cardiac arrests by analyzing the distribution characteristics of arrest patients according to age and sex with special emphasis on ventricular fibrillation (VF). ⋯ Our study provides evidence that there are significant age and sex related epidemiological differences in cardiac arrests and we need to understand them better. Strategies that focus on high yielded patients, those in witnessed VF, should be pursued. These efforts should be expected to yield sex and age related differences in survivors.
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Prolonged coma is not an uncommon clinical problem following resuscitation from cardiac arrest. Early and precise prediction of outcome is highly desirable for ethical and economical reasons. The aims of this study were to use positron emission tomography (PET) to investigate the regional dynamic changes of cerebral blood flow and metabolism during the early period after cardiopulmonary resuscitation (CPR) in unconscious patients and to evaluate if PET may be a potential prognostic evaluator. ⋯ An initially low CMRO(2) was common to all patients. Early development of subclinical focal ischemic lesions was also common. The progressive depression of CMRO(2) over the first week in those patients remaining unconscious may be an indication of prolonged but not necessarily permanent coma. Further studies are required to identify pathophysiological features that can predict the long-term clinical outcome in patients who remain unconscious after 1 week.
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Do not attempt resuscitation (DNAR) decision-making and recording in case notes can be poor. We have audited current practices pertaining to DNAR orders in a district hospital before and after the introduction of a standardised order form (SOF). ⋯ Documentation of DNAR decisions in medical case notes is poor. Standardised order forms, based on recommended national guidelines that complement case note entries, improve the process and recording of this sensitive decision.
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In some patients with ventricular fibrillation (VF) there may be a better chance of successful defibrillation after a period of chest compression and ventilation before the defibrillation attempt. It is therefore important to know whether a defibrillation attempt will be successful. The predictive power of a model developed by 'genetic' programming (GP) to predict defibrillation success was studied. ⋯ The VF ECG contains information predictive of defibrillation success. The model developed by GP, including data from the time-domain, frequency-domain and nonlinear dynamics, could reduce the incidence of unsuccessful defibrillations.