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Further Investigations into the Speed of Cerebral Swelling Following Blunt Cranial Trauma*

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Abstract:

Abstract:  An anesthetized sheep model of traumatic brain injury (TBI) has been developed to assess early changes in intracranial pressure (ICP) following closed head injury. Immediately after TBI, a transient (<10 min) hypertensive response occurred, followed by significant and prolonged systemic hypotension. ICP demonstrated a biphasic response, being seven times baseline values of 8 ± 2 mm Hg 10 min after injury, decreasing to 25 ± 2 mm Hg by 30 min, and then increasing to values exceeding 30 mm Hg by 4 h postinjury. ICP was always significantly higher than baseline values, which combined with hypotension, reduced cerebral perfusion pressure to less than 60% of normal. This early and sustained increase in ICP after craniocerebral trauma acutely alters cerebral perfusion pressure and brain oxygenation and provides a potential pathophysiological explanation for immediate clinical manifestations in humans following significant TBI.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.1556-4029.2012.02109.x

Affiliations: Adelaide Centre for Neuroscience Research, School of Medical Sciences, The University of Adelaide, Frome Road, Adelaide, SA 5005, Australia.

Publication date: July 1, 2012

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