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Postural effects on gas exchange in infants

D P Heaf, P Helms, I Gordon

    The New England Journal of Medicine
    |June 23, 1983
    PubMed

    Insights

    In infants with unilateral lung disease, positioning the healthy lung uppermost improves oxygenation. This finding contrasts with adults, highlighting a critical difference in managing gas exchange in pediatric patients.

    Area of Science:

    • Pediatric Pulmonology
    • Respiratory Physiology
    • Critical Care Medicine

    Background:

    • Unilateral lung disease impairs pulmonary gas exchange.
    • In adults, positioning the healthy lung in a dependent position improves gas exchange.
    • Optimal positioning in infants with unilateral lung disease is not well established.

    Purpose of the Study:

    • To investigate the effect of body positioning on gas exchange in infants with unilateral lung disease.
    • To compare gas exchange in supine, right lateral, and left lateral positions.
    • To determine if infant positioning differs from adult recommendations.

    Main Methods:

    • Studied 10 infants with unilateral lung disease.
    • Measured transcutaneous oxygen and carbon dioxide pressures.
    • Utilized krypton lung scans and thoracic gas volume measurements in a subset of patients.

    Main Results:

    • Oxygenation was significantly better with the good lung uppermost (82 mmHg) compared to the good lung dependent (73 mmHg) or supine (78 mmHg) positions.
    • Ventilation preferentially went to the uppermost lung.
    • No significant changes in functional residual capacity, tidal volume, or lung compliance were observed with position changes.

    Conclusions:

    • Oxygenation in infants with unilateral lung disease is optimized when the healthy lung is positioned uppermost.
    • This finding is contrary to established practice in adults.
    • Body positioning strategies for unilateral lung disease require age-specific considerations.

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