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.
Study Type
OBSERVATIONAL
Children's Hospital of Wisconsin
Milwaukee, Wisconsin, United States
Volumetric flow of patient cerebrospinal fluid through an Extra-Ventricular Drainage System as a function of the shunt valve pressure release setting and drainage bag position.
Time frame: 24 to 48 hours
Recording of the pressure waveform related to the volumetric flow of patient cerebrospinal fluid through an Extra-Ventricular Drainage system.
Time frame: 24 to 48 hours
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