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High-sensitivity optical lymph flow-meter.

O Sorensen, A Engeset, W I Olszewski

    Lymphology
    |March 1, 1982
    PubMed
    Summary
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    This study introduces an optical flow-meter for precise lymph flow measurement in humans. The device uses an air bubble to track flow in cannulated lymph vessels, enabling accurate clinical assessment.

    Area of Science:

    • Biomedical Engineering
    • Physiology
    • Medical Devices

    Background:

    • Accurate measurement of lymph flow is crucial for understanding lymphatic system function and diagnosing related diseases.
    • Existing methods for lymph flow quantification are often invasive or lack precision.
    • Clinical application requires instruments that are sensitive, reliable, and suitable for patient use.

    Purpose of the Study:

    • To describe a novel optical flow-meter designed for precise and continuous registration of human lymph flow.
    • To detail the technical specifications and operational principles of the instrument.
    • To demonstrate the instrument's application in a clinical setting, measuring lymph flow and pressure.

    Main Methods:

    • Development of an optical flow-meter utilizing an air bubble introduced into the lymph flow.

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  • Connection of the lymph vessel cannula to the instrument's measurement tubing.
  • Automatic monitoring of the air bubble's movement to quantify flow rate.
  • Integration of lateral intralymphatic pressure measurement.

    • Main Results:

    • The optical flow-meter achieves a sensitivity limit of approximately 0.1 microliters.
    • It reliably registers lymph stroke volumes as low as 1 microliter, typical in human leg lymphatics.
    • The instrument's design is optimized for clinical usability and capacity.

    Conclusions:

    • The developed optical flow-meter provides a precise and continuous method for measuring human lymph flow.
    • Its high sensitivity and clinical suitability make it valuable for research and diagnostics in lymphatic disorders.
    • The instrument facilitates simultaneous recording of lymph flow and intralymphatic pressure, offering deeper physiological insights.