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Developmental changes in ventilation and breathing pattern in unanesthetized kittens.
Respiration Physiology
|December 1, 1984
Summary
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:
- 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.