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Related Experiment Videos

Monitoring urinary bladder temperature.

S S Moorthy, B A Winn, M S Jallard

    Heart & Lung : the Journal of Critical Care
    |January 1, 1985
    PubMed
    Summary

    Bladder temperature monitoring accurately reflects core body temperature during steady states in cardiac surgery patients. However, it lags behind esophageal and nasopharyngeal temperatures during cooling and rewarming phases.

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    Area of Science:

    • Cardiovascular Surgery
    • Physiological Monitoring
    • Thermoregulation

    Background:

    • Accurate core body temperature monitoring is crucial during cardiopulmonary bypass (CPB) in cardiac surgery.
    • Esophageal and nasopharyngeal probes are commonly used, but their accuracy during rapid temperature changes is debated.
    • Alternative sites for core temperature monitoring require evaluation.

    Purpose of the Study:

    • To compare bladder, rectal, and esophageal temperatures with nasopharyngeal temperatures in patients undergoing cardiac surgery with CPB.
    • To assess the reliability of bladder temperature as a surrogate for core temperature during different phases of CPB.

    Main Methods:

    • Prospective observational study involving 12 adult patients undergoing cardiac surgery requiring CPB.
    • Simultaneous measurement of nasopharyngeal, esophageal, bladder, and rectal temperatures.
    • Analysis of temperature trends during cooling, rewarming, and steady-state periods.

    Main Results:

    • Bladder temperature changes lagged significantly behind nasopharyngeal and esophageal temperatures during rapid cooling and rewarming.
    • Rectal temperature exhibited the slowest response to temperature fluctuations.
    • Bladder and rectal temperatures showed close agreement during the post-operative steady state.

    Conclusions:

    • Bladder temperature monitoring can reliably represent core body temperature in a steady state following cardiac surgery.
    • Esophageal and nasopharyngeal probes offer more dynamic temperature readings during rapid cooling and rewarming.
    • Bladder temperature may serve as a practical and accurate measure of core temperature in stable surgical conditions.

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