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- W2040692466 abstract "To test the hypothesis that the crescendo-decrescendo type of pattern of periodic breathing is more common in infants than in adulthood, we examined the morphologies of periodic breathing in four groups of subjects: group 1 (n=10, gestational age 30+/-1 week), group 2 (n=10, GA 31+/-1 week), group 3 (n=10, GA 38+/-1 week), and group 4 (n=10, age 50+/-4 years). Respiratory pattern and ventilation were measured using a flow-through system. The breathing morphologies were defined according to the respiratory flow. We found (1) a predominant crescendo-decrescendo pattern in preterm infants (groups 1 and 2, >50%) and this changed to a predominant decrescendo breathing in adults (group 4, 50%); (2) total breathing cycle and its phases did not change significantly among the neonatal groups, but they almost doubled in adult subjects; however, the number of breaths per breathing interval remained the same (crescendo-decrescendo) or less (flat and decrescendo) in adults as compared to preterm infants; (3) the duty cycle (breathing interval/cycle duration) remained consistent with age; and (4) at the beginning of each breathing interval, alveolar P(CO2) was highest and alveolar P(O2) and O2 saturation lowest. The findings suggest a change in the strategy of the respiratory control system during periodic breathing between the infant and the adult, perhaps dictated by mechanical and chemoreceptor limitations early in age, with a switch from a crescendo-decrescendo to a predominantly decrescendo pattern." @default.
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- W2040692466 date "2001-09-01" @default.
- W2040692466 modified "2023-10-07" @default.
- W2040692466 title "The morphology of periodic breathing in infants and adults" @default.
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- W2040692466 doi "https://doi.org/10.1016/s0034-5687(01)00249-3" @default.
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