Obstructive disease is characterized by an increase in ...

Obstructive disease is characterized by an increase in airway resistance that is measured as a decrease in peak expiratory flow rates. In some cases, there is a miss-match between the FEV1/FVC ratio. The normal person exhales most of the inspired air in the 1st second; this ratio on normal subjects is around 0.8, this means that 80% of the ... ................
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