Implantable pressure sensing device for longitudinal intracranial pressure monitoring

An intracranial pressure measurement device has a first plate abutting a patient's dura mater and displaced from a second plate abutting an endocranial surface of the patient's skull. The displacement of the first plate and second plate during elevated intracranial pressures are indicated visually on the device and visible through, e.g., X-ray imaging. This allows the intracranial pressure to be correlated to the mechanical displacement of the first plate from the second plate.