Resonant frequency of the chest-lung system by analysis of the respiratory flow curve.
1. Resonant frequency of the chest-lung system in six tracheotomized, spontaneously breathing dogs was determined by analyzing the shape of the respiratory flow curve. 2. The resonant frequency was calculated from the periodic deviations from a sinusoidal flow pattern observed in the inspiratory phase of the breathing cycle. 3. Mean (+/- S.D.) resonant frequency was 6.1 +/- 0.9 Hz which was very close to the panting frequency (5.7 Hz) of the same dogs. 4. Resonant frequencies of the respiratory system in various species are compared.
Hahn
G
G
Abteilung Physiologie, Max-Planck-Institut für experimentelle Medizin, Göttingen, F.R.G.
D000818:Animals; D004285:Dogs; D005260:Female; D006801:Humans; D008297:Male; D015656:Respiratory Mechanics / Q000502:physiology*; D012143:Respiratory Physiological Phenomena; D013045:Species Specificity