Erschienen in:
14.03.2019 | Original Work
Propofol/Remifentanil Anesthesia Might Not Alter the Middle Cerebral Artery Diameter by Digital Subtraction Angiography
verfasst von:
Stefano Arrigoni-Marocco, Nicolas Engrand, Vittorio Civelli, Joaquim Mateo, Marc-Antoine Labeyrie, Jean-Pierre Saint-Maurice, Alexandre Mebazaa, Etienne Gayat, Emmanuel Houdart, Fabrice Vallée
Erschienen in:
Neurocritical Care
|
Ausgabe 2/2019
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Abstract
Introduction
Transcranial Doppler (TCD) of the middle cerebral artery (MCA) enables the measurement of the mean blood velocity (MCAVm) and the estimation of the cerebral blood flow (CBF), provided that no significant changes occur in the MCA diameter (MCADiam). Previous studies described a decrease in the MCAVm associated with the induction of total intravenous anesthesia (TIVA) by propofol and remifentanil. This decrease in blood velocity might be interpreted as a decrease in the CBF only where the MCADiam is not modified across TCD examinations.
Methods
In this observational study, we measured the MCADiam of 24 subjects (almost exclusively females) on digital subtraction angiography under awake and TIVA conditions.
Results
Across the two phases, we observed a decrease in the mean arterial blood pressure (from 84 ± 9 to 71 ± 6 mmHg; p < 0.001) and heart rate (76 ± 10 vs. 65 ± 8 beats/min; p < 0.001), and a concomitant decrease in the MCAVm (61 vs. 42 cm/s; p < 0.001). In contrast, the MCADiam did not vary in association with TIVA (2.3 ± 0.2 vs. 2.3 ± 0.2 mm; p = 0.52).
Conclusions
Those results suggested that in this population, no significant changes in the MCADiam are associated with TIVA.