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Developmental changes in ventilation and breathing pattern in unanesthetized kittens.

S Parot, M Bonora, H Gautier

    Respiration Physiology
    |December 1, 1984
    PubMed
    Summary
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    Kitten respiratory development shows distinct phases. Breathing rate (BR) and tidal volume (VT) change significantly from birth to 5 months, with ventilation (VE) stabilizing by 5 months of age.

    Area of Science:

    • Comparative physiology
    • Developmental biology
    • Respiratory physiology

    Background:

    • Understanding respiratory development is crucial for neonatal care and comparative physiology.
    • Kitten respiratory patterns undergo significant changes from birth through adolescence.

    Purpose of the Study:

    • To characterize the developmental trajectory of ventilation and breathing patterns in kittens.
    • To identify age-related changes in tidal volume and breathing rate from the early postnatal period to 12 months.

    Main Methods:

    • Longitudinal recording of ventilation (VE), tidal volume (VT), and breathing rate (BR) in 12 unanesthetized, unrestrained kittens.
    • Measurements were taken at intervals from postnatal day 2 up to 12 months of age.

    Main Results:

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    • Ventilation (VE) stabilized by 5 months postnatally, while body weight continued to increase.
    • Breathing rate (BR) decreased and tidal volume (VT) increased during the first month.
    • From 1 to 5 months, BR remained stable with increasing VT; from 5 to 12 months, BR and VT showed slight decreases and increases, respectively, with stable VE.

    Conclusions:

    • Kitten respiratory control exhibits distinct developmental phases, with significant shifts in breathing mechanics during the first 5 months.
    • The observed changes in breathing patterns contribute to our understanding of mammalian respiratory development and provide a basis for interspecific comparisons.