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Analysis of Breathing Pattern in Children with Asthma
Author(s) -
Tanaka Tetsuro,
Shimazaki Tetsuya,
Kusakawa Isao,
Ogihara Masaaki,
Honda Teruo,
Katayama Masao,
Miyasaka Katsuyuki
Publication year - 1990
Publication title -
pediatrics international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.49
H-Index - 63
eISSN - 1442-200X
pISSN - 1328-8067
DOI - 10.1111/j.1442-200x.1990.tb00845.x
Subject(s) - medicine , asthma , respiratory system , respiratory rate , tidal volume , plethysmograph , asthma attack , ventilation (architecture) , cardiology , anesthesia , respiratory minute volume , heart rate , blood pressure , engineering , mechanical engineering
The breathing pattern in children with asthma was studied, using respiratory inductive plethysmography. The subjects were 31 children with mild to moderate asthma (15 males, 16 females; aged 6∼15 years, average 11 years). The respiratory rate was 25.5±10.7/min. (mean ± S.D.) during asthma attacks and 18.4 ± 5.0/min. between attacks with a significant increase during attacks (P < 0.001). The expiratory time was 1.774 ± 0.833 second during attacks, and 2.125 ± 0.602 seconds between attacks. The expiratory time to total respiratory time ratio (T E /T TOT ) was 0.631 ± 0.056 during attacks and 0.608 ± 0.035 between attacks. Thus there was a slight prolongation at the time of attack, but the difference was not significant. The tidal volume was increased slightly during mild and moderate attacks. V T /T I (mean inspiratory flow) was increased during attacks. The respiratory pattern was thoracic during attacks and changed to the abdominal pattern with improvement.