Transkranielle Doppler- und Farbduplexsonographie

Autor:	R W Baumgartner, Iris B. Baumgartner
Rok vydání:	2008
Předmět:	medicine.medical_specialty business.industry Cerebral arteries Vasospasm medicine.disease Transcranial Doppler Hydrocephalus Cerebral blood flow medicine.artery Patent foramen ovale medicine Radiology Nuclear Medicine and imaging Radiology business Intracranial pressure Circle of Willis
Zdroj:	Ultraschall in der Medizin. 17:50-54
ISSN:	1438-8782 0172-4614
DOI:	10.1055/s-2007-1003146
Popis:	Transcranial Doppler and color-coded duplex sonography provide reliable information on cross-flow through the circle of Willis, stenoses, occlusions and vasospasm of the major basal cerebral arteries. The CO2 and acetazolamide tests allow quantitative evaluation of the hemodynamic impact of obstructive cerebrovascular disease. Furthermore, transcranial Doppler sonography is used for detection of enhanced intracranial pressure, confirmation of brain death, detection of cerebral microemboli ("high intensity transient signals" = "HITS"), and patent foramen ovale. In the future, cerebral microemboli may become a marker for embolic activity of both occlusive carotid artery and cardiac disease. Transcranial color-coded duplex sonography identifies intracranial hemorrhage, cerebrovascular malformations, and hydrocephalus, but is inferior to neuroradiological techniques. Transpulmonary contrast agents make the examination of patients with inadequate insonation windows feasible, and increase diagnostic confidence in transcranial ultrasonography. Transcranial power-based color-coded duplex sonography ("power Doppler") may further improve transcranial ultrasonography, and visualize flow in smaller vessels.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0a4054734eee7008179c3cac5ae2b5cc https://doi.org/10.1055/s-2007-1003146 Zobrazit plný text záznamu