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Hypocapnia can cause harm and should be strictly limited to the emergent management of life-threatening intracranial hypertension pending definitive measures or to facilitate intraoperative neurosurgery. When it is used, Paco2 should be normalized as soon as is feasible. Outside these settings hypocapnia is likely to produce more harm than benefit.
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Curley et al. (2010) studied this question.
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