Microdialysis and Jugular Bulb Glucose Profiles During Hyperglycaemic Clamping in Patients with Severe Acute Brain Injury

"Following an overnight fast, the investigators will perform simultaneous samples from the arterial line, the venous line, and microdialysis and consider these samples as baseline values.~If the patient's blood glucose level is at 8-10 mmol/L at baseline, the investigators will not proceed with the intervention and instead evaluate if the intervention can take place the following day.~After baseline values are measured, intravenous glucose 20% (200g/1,000 ml) is infused to raise the glucose levels in both plasma and extravascular glucose compartments with approximately 3 mmol/L."