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

Acta neurochirurgica
M ShigemoriS Kuramoto

Abstract

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.

References

Feb 1, 1986·Journal of Neurosurgery·K MesseterE Ryding
May 1, 1988·Surgical Neurology·F W Saunders, P Cledgett
Sep 1, 1986·Stroke; a Journal of Cerebral Circulation·C C BishopN L Browse
Sep 1, 1984·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·T M MarkwalderR Aaslid
Jan 1, 1982·Journal of Neurosurgery·T A GennarelliL H Pitts

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Citations

Nov 25, 2005·Physics in Medicine and Biology·Greg T Clement
Jan 16, 2013·Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging·Béla FülesdiLászló Csiba
Nov 3, 2010·BMC Neurology·Henry W QuerfurthCraig van Horne
Jan 1, 1997·Critical Care Clinics·E M Manno

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