For medical professionals treating hydrocephalus—a chronic neurological condition caused by an abnormal accumulation of cerebrospinal fluid (CSF), resulting in pressure on the brain—there have been a limited range of treatment options. The most common is the surgical placement of a medical device called a shunt, a sort of flexible tube, which is placed in the ventricular system of the brain, diverting the flow of CSF from the brain to elsewhere in the body.