Le doppler transcrânien en neurochirurgie
| Autor: | C. Ract, Bernard Vigué, Thomas Geeraerts, Jacques Duranteau |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
medicine.medical_specialty
business.industry Cerebral arteries Vasospasm medicine.disease Transcranial Doppler Cerebral circulation Cerebral vasospasm Cerebral blood flow medicine.artery Internal medicine Anesthesia Middle cerebral artery Cardiology Medicine Surgery Neurology (clinical) Cerebral perfusion pressure business |
| Zdroj: | Neurochirurgie. 54:731-738 |
| ISSN: | 0028-3770 |
| Popis: | Transcranial doppler (TCD) is a noninvasive and easily repeatable method to measure the blood flow in basal cerebral arteries. Mean velocities of red blood cells in basal arteries are related to cerebral blood flow. Because of low peripheral resistance in cerebral arteries, diastolic velocity (V(d)) remains positive in cerebral circulation in physiological situations. The pulsativity index (PI; normal values for the middle cerebral artery=1.0+/-0.2) and end diastolic velocity (EDV; normal values for the middle cerebral artery=40+/-10 cm/s) give important information to evaluate the resistance status of small downstream arteries. A high PI (>1.4) with a low EDV ( |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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