Medizinische Universität Graz Austria/Österreich - Forschungsportal - Medical University of Graz
Gewählte Publikation:
LITSCHER, G; SCHWARZ, G; KIRISITS, H.
DISSOCIATION OF EEG, EVOKED-POTENTIALS AND TRANSCRANIAL DOPPLER SONOGRAPHY IN COMA DEPASSE
EEG-EMG-Z ELEKTROENZ ELEKTROM. 1995; 26(2): 112-116.
Doi: 10.1055/s-2008-1060227
Web of Science
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- Führende Autor*innen der Med Uni Graz
- Litscher Gerhard
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- Abstract:
- EEG, multimodal evoked potentials and transcranial Doppler sonography are ancillary non-invasive methods to determine brain death. Arrest of the cerebral circulation is correlated with the following transcranial Doppler sonography findings: (a) no signal, (b) systolic spikes, and (c) diastolic reverse flow. We describe a 42-year-old patient after head injury with nasoliquorrhea. The EEG was isoelectric, brainstem auditory evoked potentials showed continuous loss of components I-V bilaterally, and early somatosensory evoked potentials showed a loss of cortical components bilaterally. Transcranial Doppler sonography of the right middle cerebral artery showed diastolic reverse now compatible with brain death. 40 hours later transcranial Doppler sonography showed an increase of the systolic and diastolic flow velocities. The results show that signs of cerebral perfusion can be found in patients with clinically and electrophysiologically defined brain death. This suggests that transcranial Doppler sonography cannot be used as an isolated parameter to determine brain death. Reperfusion in a patient with no electric brain activity could be due to surgical or traumatic alleviation of increased intracranial pressure.
- Find related publications in this database (Keywords)
- NEUROPHYSIOLOGIC MONITORING
- EVOKED POTENTIALS (BAEP
- SSEP)
- EEG
- TRANSCRANIAL DOPPLER SONOGRAPHY(TCD)
- BRAIN DEATH
- COMA DEPASSE
- ULTRASONOGRAPHY