Exploration of certain factors affecting the airway resistance and its determination with interruption technique for normal old, middle-aged and young persons
Huang, G.; Liu, G.; Huang, J.
Hua Xi Yi Ke Da Xue Xue Bao 27(2): 171-173
1996
ISSN/ISBN: 0257-7712 PMID: 9389035 Document Number: 464060
The airway resistance (Raw) was determined with interruption technique for 327 normal old, middle-aged and young persons after exploration of the effect of forced respiration, lung volume and upper airway compliance on it. FVC ovrhdot V-75, ovrhdot V-50 and ovrhdot V-25 were also performed. The regression equations of expiratory and inspiratory resistances (R, R-1) were built with age, height and FVC as independent variables. The results showed that both expiratory and inspiratory resistances had a tendency of increase with aging, and FVC, ovrhdot V-75, ovrhdot V-50, ovrhdot V-25 were declined with aging. This reflected that various organs and tissues including respiratory organs gradually oldened with aging. The decrease of elastic recoil of lung and central airway can lead to an increase of airway resistance in various degrees or no change. The data and regression equations can be recommended for the application in public health and clinical care.