System for transcutaneous monitoring of intracranial pressure

An implantable biometric sensor system comprising:

• a rigid subcutaneous case;
• an access portal to an internal fluid in the rigid subcutaneous case;
• a dual frequency crystal oscillator, affixed to the rigid subcutaneous case and in ducted communication with the internal fluid, for sensing a pressure difference in the internal fluid;
• and
• at least one driver coil in electrical communication with the dual frequency crystal oscillator.

A method of determining intracranial fluid pressure providing the steps of:

• providing a cylindrical crystal oscillator probe having a transducer section and a reference section;
• providing at least one driver circuit within the cylindrical crystal oscillator probe connected to the transducer section and the reference section;
• exposing the reference section to a reference pressure;
• exposing the transducer section to the intracranial fluid pressure;
• exciting the transducer section to provide a first radio frequency energy absorption;
• exciting the reference section to produce a second radio frequency energy absorption;
• measuring the first radio frequency energy absorption;
• measuring the second radio frequency energy absorption;
• comparing the measurement of the first radio frequency energy absorption and the measurement of the second radio frequency energy absorption to determine a difference;
• relaying the difference to the reference pressure to determine the intracranial fluid pressure;
• and
• reporting the intracranial fluid pressure.