Document Detail

Morphological and hemodynamic evaluations by means of transcranial power Doppler imaging in patients with severe head injury.
MedLine Citation:
PMID:  9779155     Owner:  NLM     Status:  MEDLINE    
The following conditions of 17 patients with severe head injury (ages 9-76; mean 37:12 focal and 5 diffuse injuries) were evaluated during acute phase (1-14 days after injury, mean 5) by transcranial power Doppler imaging (PDI), a new color Doppler ultrasound technique: a) morphological changes via temporal window, b) hemodynamic changes in major intracranial/cervical arteries based on measured angle-corrected time-averaged mean (TAM)/ peak velocities and vessel diameter (Va), and calculated pulsatility indices (PI), vessel area (Va), and flow volume (Vf = TAM x Va). a) 1) Major trunks of intracranial vessels and circle of Willis and pathological changes in frontal/temporal lobes and midbrain were finely visualized. 2) Contusional hemorrhage and cerebral contusion demonstrated irregular hyper- and hypo-echoic lesions, respectively. 3) Delayed epidural hematoma showed a hyper-echoic band. b) 1) Decreased velocities, significant PI increase, and Va increase tendency were observed in intracranial arteries. 2) Increased velocities with Vf increase but no Va decrease indicated hyperemia rather than vasospasm. 3) Va in the intracranial vessels, however, tended to increase PDI appears useful in evaluating real-time and simultaneous morphological and hemodynamic information in pathogenesis and neurointensive care of patients with severe head injury.
T Shiogai; K Nagayama; G Damrinjap; K Saruta; M Hara; I Saito
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Acta neurochirurgica. Supplement     Volume:  71     ISSN:  0065-1419     ISO Abbreviation:  Acta Neurochir. Suppl.     Publication Date:  1998  
Date Detail:
Created Date:  1999-01-14     Completed Date:  1999-01-14     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  100962752     Medline TA:  Acta Neurochir Suppl     Country:  AUSTRIA    
Other Details:
Languages:  eng     Pagination:  94-100     Citation Subset:  IM    
Department of Neurosurgery, Kyorin University School of Medicine, Tokyo, Japan.
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MeSH Terms
Blood Flow Velocity / physiology
Brain / blood supply*
Brain Concussion / physiopathology,  ultrasonography
Brain Injuries / physiopathology,  ultrasonography*
Cerebral Hemorrhage / physiopathology,  ultrasonography
Hemodynamics / physiology*
Intensive Care Units
Middle Aged
Monitoring, Physiologic / instrumentation
Ultrasonography, Doppler, Transcranial / instrumentation*

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