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Fiber optic pressure sensor for biomedical applications

N Narendran1, M A Corbo, W Smith

  • 1Mechanical Technology Incorporated, Latham, New York 12110, USA.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|September 1, 1996
PubMed
Summary

This study introduces a novel fiber optic pressure sensor using white light interferometry for accurate in vivo blood pressure monitoring. The device offers low drift and high accuracy, advancing medical monitoring and cardiovascular devices.

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Area of Science:

  • Biomedical Engineering
  • Optical Sensing Technologies
  • Medical Device Development

Background:

  • Accurate in vivo blood pressure measurement is crucial for patient care, research, and managing cardiovascular devices.
  • Existing methods may have limitations in accuracy, drift, or applicability in diverse medical settings.
  • Advancements in optical sensing offer potential for improved pressure measurement solutions.

Purpose of the Study:

  • To describe a novel fiber optic pressure sensor utilizing white light interferometry.
  • To verify the feasibility and performance of a prototype fiber optic pressure gauge.
  • To present a preliminary design for a miniature, high-resolution fiber optic pressure probe.

Main Methods:

  • Development of a fiber optic sensor based on white light interferometry.

Related Experiment Videos

  • Utilizing an optical interference filter formed by an optical fiber and a sensing diaphragm.
  • Employing a thin film optical wedge interferometer to detect reflected signal wavelength.
  • Characterizing prototype gauge performance including resolution, repeatability, and drift.

    • Main Results:

    • A functional prototype pressure gauge was successfully built and tested.
    • The optical sensing approach demonstrated feasibility for pressure measurement.
    • Key performance metrics such as resolution, repeatability, and low drift were experimentally verified.
    • A preliminary design for a miniature, high-resolution probe was developed.

    Conclusions:

    • The fiber optic white light interferometry sensor offers low drift, high accuracy, and robustness to optical signal loss.
    • This technology presents significant potential for advancing medical monitoring and cardiovascular device components.
    • The validated prototype and design indicate a promising new tool for precise pressure sensing in medical applications.