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Continuous pH-measurement on anesthetized patients.

A Ehrsam, H Henner, U Haller

    Archives of Gynecology
    |September 1, 1978
    PubMed
    Summary
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    Continuous tissue pH monitoring accurately correlates with capillary pH in patients under general anesthesia. This method remains reliable across various anesthesia techniques, aiding in patient monitoring.

    Area of Science:

    • Anesthesiology
    • Physiology
    • Medical Monitoring

    Background:

    • Accurate physiological monitoring is crucial during general anesthesia.
    • Tissue pH offers a direct measure of local tissue oxygenation and metabolic state.
    • Capillary blood gas analysis is a common but invasive method for assessing acid-base balance.

    Purpose of the Study:

    • To correlate continuous tissue pH measurements with intermittent capillary pH values in patients undergoing general anesthesia.
    • To evaluate the influence of different general anesthesia methods on tissue pH monitoring.
    • To assess the reliability of continuous tissue pH measurement as a surrogate for capillary pH.

    Main Methods:

    • Continuous tissue pH monitoring was employed in 43 patients under general anesthesia.

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  • Intermittent micro-blood-samples were collected for capillary pH analysis.
  • Statistical correlation analysis was performed between tissue pH and capillary pH values.

    • Main Results:

    • A highly significant correlation was observed between continuous tissue pH and capillary pH measurements.
    • The findings indicate that tissue pH is a reliable indicator of capillary pH.
    • Different general anesthesia techniques did not appear to affect the accuracy of continuous tissue pH monitoring.

    Conclusions:

    • Continuous tissue pH measurement is a valid and reliable method for monitoring patients under general anesthesia.
    • This technique provides a strong correlation with capillary pH, offering a less invasive alternative.
    • The reliability of tissue pH monitoring is not compromised by the choice of general anesthesia method.