Why the study?
Does breathing oxygen at high pressure alter myocardial blood flow and oxygen consumption in dogs in hemorrhagic shock compared to room air?
Population
Closed-chest anesthetized dogs, evaluated under normal blood pressure and hemorrhagic shock conditions
Comparison
Breathing oxygen at high pressure vs Breathing room air at ambient pressure
Design
Preclinical
Authors
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Hyperoxia may raise myocardial O2 demand in canine shock without altering flow; leaves open translation to human resuscitation strategies.
Does breathing oxygen at high pressure alter myocardial blood flow and oxygen consumption in dogs in hemorrhagic shock compared to room air?
In a canine model of hemorrhagic shock, hyperoxia increases myocardial oxygen consumption without further decreasing myocardial blood flow, suggesting an altered baseline control mechanism during shock.
Ratliff et al. (1969) studied this question.
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