Document Detail

Transcranial Doppler: clinical and experimental uses.
MedLine Citation:
PMID:  1627439     Owner:  NLM     Status:  MEDLINE    
Blood flow velocity in the basal intracranial arteries can be reliably recorded using transcranial Doppler (TCD) ultrasonography. The utility of Doppler ultrasound in detecting stenosis of arteries has therefore been extended to include the intracranial basal arteries. This has been useful in detecting intracranial stenosis from a variety of causes including atherosclerosis and vasospasm induced by subarachnoid hemorrhage. Changes in cerebral hemodynamics during significantly increased intracranial pressure have also been detected, and have been useful in warning of compromise of the cerebral circulation in head injury. The assessment of the final hemodynamic effects of occlusive disease on the middle cerebral artery can be studied using the CO2 reactivity test. This offers additional diagnostic information in these patients. The direct detection of intracranial microemboli using TCD is also now possible and this has implications in the management of patients with stroke and transient ischemic attacks. Continuous monitoring of the middle cerebral artery velocity has been useful in indicating relative blood flow changes through this artery under certain specific circumstances. By providing continuous information on relative blood flow changes, the dynamics of the cerebral circulation can be studied in more detail. This has allowed the assessment of cerebral autoregulation, as well as blood flow changes, due to changes in cortical activity induced by visual stimulation. Further research on the dynamics of the human cerebral circulation will be possible using this technology.
D W Newell; R Aaslid
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Cerebrovascular and brain metabolism reviews     Volume:  4     ISSN:  1040-8827     ISO Abbreviation:  Cerebrovasc Brain Metab Rev     Publication Date:  1992  
Date Detail:
Created Date:  1992-08-18     Completed Date:  1992-08-18     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  8910172     Medline TA:  Cerebrovasc Brain Metab Rev     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  122-43     Citation Subset:  IM    
Department of Neurological Surgery, University of Washington School of Medicine, Seattle.
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MeSH Terms
Brain Diseases / ultrasonography
Brain Injuries / ultrasonography
Echoencephalography / instrumentation*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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