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Related Experiment Videos

Hypoxemia during hemodialysis.

G C Carlon, P B Campfield, P L Goldiner

    Critical Care Medicine
    |November 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Hypoxemia during hemodialysis in mechanically ventilated patients is caused by ventilation/perfusion and diffusion abnormalities. These issues are linked to leuko-agglutination, a drop in white blood cells, and not changes in lung volume or CO2 levels.

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    Area of Science:

    • Nephrology
    • Pulmonology
    • Critical Care Medicine

    Background:

    • Hemodialysis (HD) can lead to hypoxemia in mechanically ventilated patients.
    • The underlying mechanisms of HD-induced hypoxemia require further elucidation.

    Purpose of the Study:

    • To investigate the development and causes of hypoxemia in mechanically ventilated patients undergoing hemodialysis.
    • To assess the impact of HD on respiratory and oxygen transport variables.

    Main Methods:

    • Studied five mechanically ventilated patients during hemodialysis.
    • Measured respiratory variables (dynamic compliance, peak airway pressure, CO2 production), oxygen uptake/transport (alveolar/arterial PO2, pulmonary venous admixture, oxygen consumption), respiratory quotient, pulmonary vascular resistances, and white blood cell (WBC) count.

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    Main Results:

    • PaO2 and PaO2 decreased during dialysis.
    • Hypoxemia was not explained by reduced alveolar oxygen tension or changes in lung volumes.
    • Significant fall in WBC count observed; no significant changes in dynamic compliance, peak airway pressure, or pulmonary vascular resistance.
    • CO2 losses were clinically insignificant.

    Conclusions:

    • Ventilation/perfusion and diffusion abnormalities, associated with leuko-agglutination, are the primary causes of hypoxemia during hemodialysis.
    • The observed decrease in WBC count suggests an inflammatory response contributing to these abnormalities.