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Related Experiment Videos

Telemetry of intracranial pressure

T B Fryer, S D Corbin, G D Silverberg

    Biotelemetry and Patient Monitoring
    |January 1, 1978
    PubMed
    Summary
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    This study introduces a stable capacitive pressure transducer for continuous intracranial pressure monitoring. The implantable system offers long-term accuracy and infection reduction without battery replacement needs.

    Area of Science:

    • Biomedical Engineering
    • Neurosurgery
    • Medical Instrumentation

    Background:

    • Accurate intracranial pressure (ICP) monitoring is crucial for managing patients with abnormal ICP.
    • Traditional strain gage pressure cells lack long-term stability for chronic ICP measurements.
    • Open-end manometers are less suitable for chronic ICP monitoring due to infection risks and limitations.

    Purpose of the Study:

    • To develop and describe an implantable system for stable, long-term intracranial pressure measurement.
    • To reduce infection risks associated with ICP monitoring by eliminating transcutaneous leads.
    • To provide a reliable method for continuous ICP monitoring without the need for battery replacement.

    Main Methods:

    • Utilized a capacitive pressure transducer for enhanced long-term stability.

    Related Experiment Videos

  • Developed an implantable telemetry system to transmit ICP data transcutaneously.
  • Integrated an oscillator (8-10 MHz) where pressure modulates frequency for signal transmission.
  • Implemented inductive energizing to eliminate the need for periodic battery replacement.

    • Main Results:

    • The capacitive transducer demonstrated excellent long-term stability for ICP measurements.
    • The implantable telemetry system successfully transmitted ICP data, reducing infection risks.
    • Inductive power transfer enabled virtually unlimited operating life for the implanted device.

    Conclusions:

    • The described capacitive pressure transducer system offers a stable and reliable solution for long-term intracranial pressure monitoring.
    • This implantable, inductively powered device minimizes infection risks and eliminates battery maintenance.
    • The system represents a significant advancement in neurosurgical monitoring technology.