Inclusion Criteria:

1. Male or female sex at birth, and aged 18 years or older on the date of enrollment.
2. Receiving continuous invasive ICP monitoring (Bolt or EVD) as part of standard care.
3. Invasive ICP monitor catheter penetrating the parenchyma or ventricles.
4. Receiving continuous invasive ABP monitoring as part of standard care.

Exclusion Criteria:

1. Presence of any implant (cosmetic or otherwise) in the frontal bone in such proximity to the CoMind One EFS Sensor that they might physically touch.
2. Open wounds on the forehead such that CoMind One EFS Sensor cannot be safely placed over an area of intact skin
3. Presenting with radiographic evidence of a non-intact skull at the recording site on admission.
4. If patient is enrolled in an intervention/study that may interfere with SoC ICP measurements or the CoMind One EFS device measurement then the patient is ineligible.
5. Patients with decompressive craniectomy will be excluded unless a CoMind One EFS recording can be made from intact skull.