Intracranial pressure (ICP) monitoring is the most common neuromonitoring modality used in neurocritical care (NCCU) around the world. Uncertainties remain around ICP monitoring both in traumatic and non-traumatic brain injury, and variation in clinical practice of ICP monitoring exists between ICUs. The objectives of the study are to explore ICP monitoring variation in practice in order to prioritize uncertainties in the clinical management of critical care patients with acute brain injury and support further collaborative hypotheses based prospective studies.