ASSESSMENT OF CEREBROVASCULAR AUTOREGULATION DURING HALOTHANE AND PROPOFOL ANESTHESIA BY TILTING AND TRANSCRANIAL DOPPLER SONOGRAPHY IN INFANTS 915

Introduction: In order to assess cerebrovascular autoregulation(CA) non-invasively we studied reaction of CBFV to orthostasis provoked by tilting during halothane (h) and propofol (p) anesthesia; as (h) compromises and (p) preserves cerebrovascular autoregulation.

Methods: 20 healthy infants < ly were studied randomly during minor elective surgery. CBFV were assessed in MCA with a transcranial Doppler system (DWL, Multi Dop X; I_SPTA: 1,5-5 mW/cm²) allowing continuous measurements. Data were analysed by Wilcoxon-signed-rank-test. Tilting-test: Infants were quickly tilted by 40° from supine to orthostatic head-up position, kept tilted for 2 min and then tilted back.

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