[Determination of airway resistance with the interruption technique in 300 normal adolescents].
The airway resistance (Raw) was determined with interruption technique in 300 normal adolescents aged 12 to 19 years on the RM-6000 polygraph system. FVC, V75, V50, V25 were also measured. The regression equations of expiratory and inspiratory resistances were built with multiple stepwise regression analysis on the IBM-PC/XT computer with age, height and FVC as independent variables. The results showed that both expiratory and inspiratory resistances decreased with age and negatively correlated with height and FVC, but FVC, V75, V50, V25 increased with age. These reflected that Raw declined with the growth and development of the lung and airway proportionally. This fact is correspondent with some international investigations. The rules and regression equations of Raw variation during the growth of adolescents for Chinese presented in this paper can be put to use in public health and clinical work.
Huang
G
G
Liu
G
G
Huang
J
J
D000293:Adolescent; D000328:Adult; D000403:Airway Resistance / Q000502:physiology*; D002648:Child; D002681:China; D005260:Female; D006801:Humans; D008168:Lung / Q000502:physiology; D008297:Male; D012016:Reference Values; D012044:Regression Analysis; D014797:Vital Capacity