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Blood acid-base state at a variable temperature. A graphical representation.

A Malan

    Respiration Physiology
    |November 1, 1977
    PubMed
    Summary
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    This study presents a method to correct blood pH and PCO2 values to a standard temperature, enabling clearer interpretation of acid-base balance changes during temperature variations in various physiological states.

    Area of Science:

    • Physiological chemistry
    • Biophysics

    Background:

    • Blood temperature fluctuations affect plasma pH and PCO2.
    • Understanding acid-base balance is crucial in varying physiological conditions.

    Purpose of the Study:

    • To develop a correction procedure for blood pH and PCO2 to a standard temperature (T*).
    • To enable easier interpretation of acid-base changes associated with body temperature variations.

    Main Methods:

    • Utilized closed system (anaerobic) blood conditions to observe pH and PCO2 changes.
    • Applied established principles of acid-base homeostasis and osmotic relationships.
    • Developed a temperature-correction procedure for in vivo blood samples.

    Main Results:

    • Temperature-corrected blood pH (pH*) and PCO2 (P*CO2) values were derived.

    Related Experiment Videos

  • A temperature-independent bicarbonate-pH diagram was created for data representation.
  • The method allows for consistent analysis across different body temperatures.

    • Conclusions:

    • The developed correction procedure facilitates the interpretation of blood acid-base status during temperature changes.
    • This approach is valuable for studying ectotherms, hibernators, and patients under artificial hypothermia.
    • Potential extension to intracellular pH analysis is considered.