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Oxygen pressure in small lymphatics

T Barankay, H Baumgärtl, D W Lübbers

    Pflugers Archiv : European Journal of Physiology
    |October 15, 1976
    PubMed
    Summary
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    Lymph vessel oxygen levels (PLO2) are influenced by surrounding tissue oxygen and lymph cell activity. Measurements show lymph oxygen reflects interstitial fluid oxygen but is also affected by local tissue and blood vessel oxygen.

    Area of Science:

    • Physiology
    • Microcirculation
    • Lymphatic System

    Background:

    • The oxygen tension within lymphatic vessels (PLO2) is crucial for understanding lymph formation and transport.
    • Factors influencing PLO2, such as interstitial fluid oxygen and cellular metabolism, require detailed investigation.

    Purpose of the Study:

    • To experimentally determine the primary sources of oxygen influencing PLO2 in rabbit hind limb lymph vessels.
    • To elucidate the relationship between interstitial oxygen, surrounding tissue oxygen, and lymph oxygen tension.

    Main Methods:

    • Measurement of PLO2 using a flow-through micro chamber and a polarographic catheter-tip oxygen electrode.
    • Experimental manipulations included superfusion with oxygenated saline, arterial occlusion, and oxygen inhalation.

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    Main Results:

    • Lymphatic capillaries' oxygen tension (PLO2) can reflect interstitial fluid oxygen levels.
    • PLO2 increased with oxygen superfusion and inhalation, and decreased with arterial occlusion, indicating influence from surrounding tissues and blood supply.
    • A significant difference in PLO2 measurements between the flow-through chamber and catheter electrode suggests oxygen consumption by lymph cells.

    Conclusions:

    • Lymph vessel oxygen tension is a complex parameter influenced by interstitial fluid oxygen, surrounding tissue oxygen, and lymph cell metabolic activity.
    • The oxygen consumption of lymph cells plays a notable role in determining the measured PLO2.
    • Understanding these factors is essential for comprehending lymphatic system physiology and its role in tissue oxygenation.