Resuscitation
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The purpose of this study was to compare truncated exponential biphasic waveform versus truncated exponential monophasic waveform shocks for transthoracic defibrillation over a wide range of energies. Biphasic waveforms are more effective than monophasic shocks for defibrillation at energies of 150-200 Joules (J) but there are few data available comparing efficacy and safety of biphasic versus monophasic defibrillation at energies of <150 J or >200 J. Thirteen adult swine (weighing 18-26 kg, mean 20 kg) were deeply anesthetized and intubated. ⋯ Biphasic waveform shocks (5/5 ms) for transthoracic defibrillation were superior to monophasic shocks (10 ms) at low energy levels. Percent success increased with increasing energies. PEA occurred infrequently with either waveform.
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Newborn Life Support (NLS) courses use manikins for demonstration and practise of skills required for newborn resuscitation. The aim of this study was to compare currently available manikins for physical characteristics and feedback during psychomotor tasks. ⋯ Features of the 'ideal' manikin are proposed. Manufacturers should consider these features when developing manikins for training in newborn resuscitation.
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To describe the diurnal, weekly and seasonal rhythm among patients suffering from out of hospital cardiac arrest in Sweden. ⋯ We found that out of hospital cardiac arrest of a cardiac etiology has a diurnal, weekly and seasonal rhythm occurring most frequently in the morning hours, on Mondays and in December and January. Age, sex and place of arrest influence these rhythms.
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One of the serious problems that occurs after cardiopulmonary resuscitation is brain posthypoxic/ischemic deoxygenation. However, there has been no report concerning the effect of isoflurane (ISO) on the brain oxygenation during hypoxia-reoxygenation in relation to cell adhesion molecules (CD11b) in polymorphonuclear leukocyte. Rats were anesthetized with a low concentration of ISO (0.5 MAC: low ISO) or high concentration of ISO (1.5 MAC: high ISO) and brain oxygenation was detected by near infrared spectroscopy during 10-min hypoxia (5% O(2)) and a subsequent 120-min reoxygenation period. ⋯ A significant negative correlation was observed between CD11b and two of the measured oxyparameters, HbO(2) and tHb, during reoxygenation at low ISO, but not at high ISO. These findings suggest that brain deoxygenation during hypoxia-reoxygenation is partly related to the expression of CD11b. We conclude that ISO modifies the brain circulation at least in part through attenuating the expression of CD11b during hypoxia-reoxygenation.
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Biography Historical Article
The resuscitation greats. Professor Sir Robert Macintosh, 1897-1989.