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Related Experiment Videos

Developmental alterations in pulmonary function of the lamb.

T H Shaffer, M R Wolfson, D Forman

    Respiration; International Review of Thoracic Diseases
    |January 1, 1985
    PubMed
    Summary

    Pulmonary function in lambs shows significant changes with development. Lung compliance and capacity increase, while specific compliance and conductance decrease as lambs mature.

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    Area of Science:

    • Comparative Physiology
    • Respiratory Physiology
    • Neonatal Development

    Background:

    • Pulmonary function undergoes significant changes during development.
    • Understanding these changes is crucial for neonatal respiratory care.
    • Lamb models offer insights into mammalian lung development.

    Purpose of the Study:

    • To quantitate developmental alterations in pulmonary function.
    • To assess changes in lung mechanics from preterm to newborn stages.
    • To establish normative data for lamb lung function during development.

    Main Methods:

    • Evaluated pulmonary function in 40 lambs (106-161 postconceptual days).
    • Included preterm (C-section) and term (vaginal) lambs.
    • Mechanically ventilated animals with catheters, measuring transpulmonary pressure, airflow, tidal volume, and functional residual capacity.

    Main Results:

    • Lung compliance, lung conductance, and functional residual capacity increased with developmental age.
    • Specific compliance and specific conductance decreased with maturity.
    • Regression analysis quantified these age-related functional changes.

    Conclusions:

    • Pulmonary function in lambs demonstrates significant developmental trajectories.
    • Lung mechanics adapt measurably from preterm to newborn stages.
    • Data provide quantitative benchmarks for assessing pulmonary development in lambs.

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