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Intracranial haemodynamics in diffuse and focal brain injuries. Evaluation with transcranial Doppler (TCD) ultrasound

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Summary

Intracranial haemodynamics were studied in 20 patients with diffuse and focal brain injury and experimental animals with acute intracranial hypertension by the use of TCD ultrasound. The mean flow velocity in the middle cerebral artery (MCA) commonly decreased on the side of the haematoma depending on intracranial pressure (ICP) elevation and cerebral perfusion pressure (CPP) reduction in focal injury. The decrease of the MCA flow velocity returned to normal after treatment. The flow velocities decreased bilaterally and there was no difference between the right and left side in diffuse injury. But the velocities increased in spite of ICP elevation when diffuse cerebral swelling developed. Cerebrovascular CO2 reactivity was impaired in two groups of patients with low Glasgow Coma Scale (GCS) scores. The mean velocity of the MCA and blood flow in the internal carotid artery exhibited flow patterns which changed correlatively depending on CPP reduction in experimental animals. Noninvasive study by use of TCD ultrasound can provide valuable information on variant haemodynamic phenomena in patients with diffuse and focal brain injury.

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Authors and Affiliations

  1. Department of Neurosurgery, Kurume University School of Medicine, Kurume, Japan

    M. Shigemori, T. Moriyama, K. Harada, N. Kikuchi, T. Tokutomi & S. Kuramoto

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  1. M. Shigemori
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  2. T. Moriyama
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  3. K. Harada
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  4. N. Kikuchi
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  5. T. Tokutomi
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  6. S. Kuramoto
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Shigemori, M., Moriyama, T., Harada, K. et al. Intracranial haemodynamics in diffuse and focal brain injuries. Evaluation with transcranial Doppler (TCD) ultrasound. Acta neurochir 107, 5–10 (1990). https://doi.org/10.1007/BF01402605

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  • DOI: https://doi.org/10.1007/BF01402605

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