Search results for "Transcranial Doppler ultrasonography"

showing 3 items of 3 documents

Contrast-enhanced transcranial Doppler ultrasonography in the diagnosis of brain death

2013

The diagnosis of brain death (BD) is based on clinical criteria including deep coma, brain stem areflexia and apnoea. Depending on different local guidelines, confirmatory technical tests are sometimes mandatory.1 Since the 1990s, transcranial Doppler sonography (TCD) has found its place in these circumstances and fulfils most of the criteria of an ‘ideal test’ in confirming BD. To confirm intracranial circulatory arrest (CA) with Doppler sonography, typical flow patterns must be recorded in bilateral intracranial and extracranial brain-supplying arteries.2 A completely absent intracranial flow signal is not a reliable sign to determine CA because this can be due to transmission problems. I…

AdultMaleBrain Deathmedicine.medical_specialtyAdolescentSystoleUltrasonography Doppler TranscranialContrast MediaPhysical examinationYoung AdultEvoked Potentials SomatosensoryIntensive careTemporal bonemedicineHumansChildAgedAged 80 and overBrain deadMicrobubblesmedicine.diagnostic_testbusiness.industryHead injuryUltrasoundElectroencephalographyMiddle Agedmedicine.diseaseTranscranial Doppler ultrasonographyPsychiatry and Mental healthDoppler sonographyCerebrovascular CirculationFemaleSurgeryNeurology (clinical)RadiologybusinessJournal of Neurology, Neurosurgery & Psychiatry
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Transcranial Doppler ultrasonography in the assessment of cerebral circulation arrest: improving sensitivity by trancervical and transorbital carotid…

2009

INTRODUCTION: Transcranial Doppler (TCD) can detect the cerebral circulation arrest (CCA) in brain death. TCD is highly specific, but less sensitive because of false-negatives accounting for up to 10%. The aim of the study was to explore the diagnostic accuracy of TCD and to determine whether it can be augmented by strategies such as the insonation of the extracranial internal carotid artery (ICA) and sequential examinations. METHODS: Data of 184 patients, who met clinical criteria of brain death, observed from 1998 through 2006, were retrospectively reviewed. The study of cerebral arteries was performed through the transtemporal approach, suboccipital insonation of the vertebro-basilar sys…

Adultcerebral circulation arrest (CCAmedicine.medical_specialtyBrain DeathNeurologybusiness.operationAdolescentUltrasonography Doppler TranscranialDiagnostic accuracyCritical Care and Intensive Care MedicineCohort StudiesCerebral circulationYoung AdultPredictive Value of Testsmedicine.arteryMedicineHumansChildAgedRetrospective StudiesAged 80 and overbusiness.industryTranscranial doppler cerebral circulatory arrest brain deathSettore MED/27 - Neurochirurgia) brain death.fungifood and beveragesInfantReproducibility of ResultsMiddle AgedTranscranial DopplerTranscranial Doppler ultrasonographyRegional Blood FlowCerebrovascular CirculationChild PreschoolTranscranial Doppler (TCD)cardiovascular systemNeurology (clinical)RadiologyInternal carotid arterybusinessTransorbitalCarotid Artery Internal
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Aktueller Stand der Hirntoddiagnostik in Deutschland

2000

□ Der Hirntod kann grundsatzlich nur dann diagnostiziert werden, wenn eine schwere akute Hirnschadigung vorliegt und andere Storungen sicher auszuschliesen sind. Primare Hirnschadigungen betreffen das Gehirn direkt (zum Beispiel intrakranielle Blutungen, Raumforderungen, schweres Schadel-Hirn-Trauma), sekundare Hirnschadigungen indirekt (zum Beispiel Hypoxie nach kardiopulmonaler Reanimation). Supratentorielle Hirnschadigungen betreffen das Groshirn, infratentorielle Hirnschadigungen den Hirnstamm und/oder das Kleinhirn. □ Koma, Hirnstammareflexie und Ausfall der Spontanatmung sind die obligaten klinischen Hirntodzeichen. Wenn diese Zeichen im Verlauf unverandert fortbestehen, ist der irrev…

Gynecologymedicine.medical_specialtybusiness.industrymedicineGeneral MedicinebusinessTranscranial Doppler ultrasonographyMedizinische Klinik
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