Cerebral Blood Flow During Propofol Anaesthesia

"Measurements are conducted from before induction of anaesthesia and until 2 hours after the start of surgery and include internal carotid artery blood flow, mean arterial pressure, heart rate, stroke volume, cardiac output, total peripheral resistance, forehead skin blood flow and haemoglobin concentrations, depth of anaesthesia, and frontal lobe, skin, and muscle oxygenation. Further measurements are conducted during hyperventilation before induction of anaesthesia and during hypo-, normo- and hypercapnia during anaesthesia.~Blood samples are obtained from the arterial line for evaluation of the arterial CO2 tension and markers of mesenteric traction syndrome. Total volume of blood sampled is less than 75 ml."