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Forced Inspiratory Flow at 25%

Known as: FIF25 
The forced inspiratory flow rate at the point on the inspiratory flow-volume curve where 25 percent of the total volume of gas has been inhaled.
National Institutes of Health

Papers overview

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2005
2005
PURPOSE The aim of this study was to evaluate whether substantial airflow changes occur by changing both jaw position and body… 
1994
1994
Study was designed to investigate the effect of prolonged application of captopril on pulmonary ventilation in patients with…