Resuscitation
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Comparative Study
Mild hypothermia after cardiac arrest in dogs does not affect postarrest cerebral oxygen uptake/delivery mismatching.
To compare measurements of cerebral arteriovenous oxygen content differences (oxygen extraction ratios, oxygen utilization coefficients) in dogs after cardiac arrest, resuscitated under normothermia vs. mild hypothermia for 1-2 h or 12 h. ⋯ After prolonged cardiac arrest, critically low cerebral venous O2 values suggest inadequate cerebral O2 delivery. Brief or prolonged mild hypothermia after arrest does not mitigate the postarrest cerebral O2 uptake/delivery mismatching.
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A two-tiered ambulance system with a mobile coronary care unit and standard ambulance has operated in Gothenburg (population 434,000) since 1980. Mass education in cardiopulmonary resuscitation (CPR) commenced in 1985 and in 1988 semiautomatic defibrillators were introduced. ⋯ Improvements in the emergency medical service in Gothenburg over a 12-year period have lead to: (1) a shortened delay time between cardiac arrest and first defibrillation and (2) an improved survival of patients with cardiac arrest outside hospital probably explained by this shortened delay time.
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Comparative Study
Resuscitation time limits in experimental pulseless electrical activity cardiac arrest using cardiopulmonary bypass.
The objective of this study was to determine the time limits of resuscitation following increasing intervals of untreated pulseless electrical activity using cardiopulmonary bypass as the resuscitation tool. ⋯ Cardiopulmonary bypass is effective at restoring spontaneous circulation when used early in asphyxial pulseless electrical activity cardiac arrest. Cardiopulmonary bypass is less effective when used after 15 min of pulseless electrical activity with no survivors following 20 min of arrest.
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Letter Comparative Study
Equal judging of new treatments in resuscitative medicine.