Bioavailability of Medium Chain Triglycerides (MCTs) in Comatose Patients With Acute Brain Injury (ABI)

Inclusion Criteria: * Comatose patients (defined by an initial Glasgow Coma Scale (GCS) \< 9) following sTBI or aSAH. * Female or male, aged \>18. * Abnormal head CT-Scan (contusions, hematoma). * Intracranial monitoring with CMD, \[PbtO2\] and \[ICP\] probes as part of standard of care. * Written informed consent from an independent physician (not associated to the research project) who provides medical follow-up and defends patient's interests. * Written informed consent from patient relative/legal representative confirming the presumed patient willingness to participate in the study Exclusion Criteria: * Signs of brain death or expected brain death within 48h. * Pregnancy. * Hemodynamic instability (circulatory shock, requiring vasopressors). * Renal or liver insufficiency . * Chronic intestinal disease. * Patients requiring parenteral nutrition . * Currently participating or having participated in another clinical trial during the month preceding the study