Cerebral vascular reactivity response to anaesthetic induction with propofol in patients with intracranial space-occupying lesions and vascular malformations
| Autor: | Martin Engelhardt, G. Cunitz, W. Schregel, Kirsten Schmieder, Albrecht Harders |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Adult
Adolescent Hemodynamics Blood Pressure Cerebral autoregulation medicine Humans Propofol Aged Central Nervous System Vascular Malformations Brain Neoplasms Vascular disease business.industry Intracranial Aneurysm Blood flow Middle Aged medicine.disease Transcranial Doppler Anesthesiology and Pain Medicine Blood pressure Cerebral blood flow Cerebrovascular Circulation Anesthesia Hemangioma business Anesthetics Intravenous Blood Flow Velocity medicine.drug |
| Zdroj: | European Journal of Anaesthesiology. 20:457-460 |
| ISSN: | 1365-2346 0265-0215 |
| DOI: | 10.1017/s0265021503000711 |
| Popis: | SummaryBackground and objective: In clinical trials, autoregulation and carbon dioxide reactivity are preserved during propofol anaesthesia. Paradoxical increases of blood flow velocity during induction of anaesthesia could be demonstrated in patients with brain tumours. This study evaluates the effects of propofol on cerebral blood flow velocity in patients undergoing surgery for brain tumours and vascular malformations.Methods: Changes in cerebral blood flow velocity after the administration of propofol were assessed using bilateral 2 MHz transcranial Doppler probes in 47 patients undergoing surgery for brain tumours and in 22 patients undergoing surgery for aneurysms and angiomas.Results: Flow reduction after propofol was slightly less pronounced on the side of the tumour; in patients with cerebrovascular lesions, no difference between the two sides was detectable. After the administration of propofol a flow increase was present on the side of the tumour in 2 patients. In 3 patients with angiomas, the flow decrease after the administration of propofol was less pronounced on the side of the angioma. Neither observation gave statistical proof of abnormality.Conclusions: The flow changes after propofol may give a hint of cerebrovascular reactivity. Further investigations should focus on combined measurements of cerebral autoregulation and carbon dioxide reactivity and should focus on patients with impaired consciousness to test for reliability. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|