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Cardio-respiratory changes during pneumoencephalography.

M A Ramsay, M P Colvin, T H Taylor

    Anaesthesia
    |November 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

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    This study investigated carbon-respiratory changes during pneumoencephalography. Minor hemodynamic shifts occurred with posture changes, but significant blood pressure increases followed intrathecal oxygen injection.

    Area of Science:

    • Anesthesiology
    • Respiratory Physiology
    • Neurosurgery

    Background:

    • Pneumoencephalography involves altering patient posture and injecting substances into the cerebrospinal fluid.
    • Understanding physiological responses during this procedure is crucial for patient safety.
    • Halothane anesthesia and spontaneous breathing were employed in this study.

    Purpose of the Study:

    • To assess carbon-respiratory and hemodynamic changes during pneumoencephalography.
    • To evaluate the effects of postural changes on respiratory parameters.
    • To determine the impact of intrathecal oxygen injection on physiological variables.

    Main Methods:

    • Fifteen patients undergoing pneumoencephalography were studied.
    • Measurements were taken in a Phillips isocentric chair.

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  • Physiological parameters were monitored during spontaneous breathing under halothane anesthesia.
  • Carbon dioxide levels (PaCO2) and blood pressure were recorded.
  • Effects of postural changes and intrathecal oxygen bolus injections were analyzed.

    • Main Results:

    • Hemodynamic changes related to postural adjustments were minimal.
    • Elevated PaCO2 was observed in two obese patients in the prone position.
    • Significant increases in blood pressure were noted after injecting over 5 ml of oxygen into the subarachnoid space.

    Conclusions:

    • Postural changes during pneumoencephalography have minor hemodynamic effects.
    • Intrathecal oxygen administration can lead to substantial blood pressure elevations.
    • Careful monitoring of respiratory and hemodynamic parameters is essential during pneumoencephalography, especially with intrathecal injections.