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Forced Inspiratory Flow at 50%

Known as: FIF50 
The forced inspiratory flow rate at the point on the inspiratory flow-volume curve where 50 percent of the total volume of gas has been inhaled.
National Institutes of Health

Papers overview

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Review
2017
Review
2017
Deepthi Laldayal, Unnati Desai, Jyotsna M Joshi Introduction: Spirometry with flow volume loop perhaps remains the least utilized… 
2008
2008
Post-infectious cough is a common diagnosis in people with chronic cough. However, the specific infectious aetiology and cough… 
2005
2005
Objectives: This study was designed to analyze whether respiratory flows and specific airway resistance (sRaw) depend on the…