Study on 148 patients (92 males, 56 females) with chronic brochitis. Two showing PEF and V75 are ones that be seem changing soonest in chronic bronchitis because event at group that be seem a normal ventilating function, but PEF and V75 have reduced lower than 80%, especially in female, if reduced lower than 70% compared with theory number. Males in chronic bronchitis have complex ventilating disorder, all showings of ventilating function are under severe category (reduced to < 40% of theory number). Similar with female, some showings are only about 20% from the theory number
Bronchitis, Chronic ; Lung Diseases ; Diseases

Through the study of 73 asthma patients of two male and female groups found that: The respiratory function in bronchial asthma is normal, although showings VC, FVC, FEV1, FEV1% and some other normal showings but V75 are reduced (in male group). In bronchial asthma of female, the distance within maximum breath out even in group diagnosed is normal ventilating function, it also reduced clearly by 58.77% of theory number. All showings on flow are reduced. In bronchial asthma, two showings PEF and V75 are ones for evaluating soon the obstructed ventilating disorder in bronchial asthma
Bronchial asthma

A study on 234 healthy persons ages from 16-60 (142 male and 92 female) was performed during 1994-1996 and CECA recommendations on ventilatory function had been applied with spiro-analyser ST 300 (Agency Fukuda Japan). The obtained results are as follows: On healthy persons: in men aged from 16-25, regression equations of IVC, FVC, FEV, predicted values increased according to age, coefficient A was positive. On the contrary in women FVC,FEV,MMF, PEF, V75, V50, V25, MVV predicted values also increased according to age, coefficient A therefore was negative. However in both sexes, these predicted values increased with the height but decreased with age.
Pulmonary Ventilation ; Lung Diseases