The study hypothesis is that a transit-time ultrasonic sensor can help doctors diagnose a
malfunctioning shunt valve.
The study will simulate an implanted shunt flow monitoring system by placing the flow sensor
and a programmable shunt valve into the patient's Extra-Ventricular Drainage line. Flow
will be measured as the doctor raises/lowers the drainage bag to simulate the patient
sitting up/lying down. The doctor will simulate a malfunctioning shunt by changing the
valve's pressure release settings for each cycle of raising/lowering the bag.
By monitoring shunt flow during these changes, the doctors hope to develop new ways to
diagnose malfunctioning shunt valves when implanted shunt flow monitors become available.
- Diagnosed with Hydrocephalus
- Newborn through age 20
- External Ventriculostomy with an Extra-Ventricular Drainage system installed
- Not diagnosed with Hydrocephalus
- Older than age 20
- No External Ventriculostomy with an Extra-Ventricular Drainage system installed