Design of a non-invasive instrument for monitoring intracranial pressure by bioelectrical impedance tomography

After studying intracranial pressure and impedance,an intracranial pressure non-invasive monitor was designed.The design was based on the Cole-cole three-component model and bioelectrical impedance technology.The system of this monitor has two parts: hardware to measure intracranial impedance and software to process experimental data,display data curves,and manage data.This monitor could measure intracranial impedance continually under the control of a computer.The monitor subsequently could obtain intracranial pressure according to the linear relationship of intracranial pressure and intracranial impedance.In this way,human intracranial pressure could be measured non-invasively.In experimentation,the least squares analysis method was applied to process data while real-time display,multi-measurements,and anti-interference technologies simultaneously were applied to enhance the measurement accuracy of the system.