Subarachnoid Hemorrhage (SAH): A type of stroke caused by bleeding into the space surrounding the brain, often resulting in sudden severe headache. Cerebrospinal Fluid (CSF): A clear fluid that ...

ECI uses CSF, which surrounds the nervous system ... The flexible catheter electrodes can be navigated freely from the spinal subarachnoid space to the brain ventricles. "This is the first ...