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Total respiratory impedance in healthy children
Author(s) -
Hantos Z.,
Daróczy B.,
Gyurkovits K.
Publication year - 1985
Publication title -
pediatric pulmonology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.866
H-Index - 106
eISSN - 1099-0496
pISSN - 8755-6863
DOI - 10.1002/ppul.1950010207
Subject(s) - medicine , respiratory system , respiratory disease , intensive care medicine , lung
Impedance of the total respiratory system was measured in 121 healthy children aged 4–16 years during spontaneous breathing by pseudo‐random forced oscillations between 3 and 10 Hz. Total respiratory resistance (R rs ), inertance (I rs ) and compliance (C rs ) were determined by least‐mean‐squares fitting. Estimates for inertance were reliable only for the larger children, where the values of I rs (0.0127 ± 0.0034 SD) were similar to those reported for normal adults. R rs correlated significantly ( P < 0.001) with height ( r = −0.868), age ( r = −0.865), and, in a subpopulation of the 6‐ to 16‐year‐old children, with forced vital capacity ( r = −0.803), The corresponding correlation coefficients for C rs were 0.873, 0.844, and 0.853, respectively. C rs amounted to about a third of the static total compliance values of Sharp et al. (J Appl Physiol 1970; 29: 775–779) over the same interval of heights. In these relationships no significant difference was found between boys and girls.