9 Questions
What is the FEV1/FVC ratio in healthy young and middle-aged adults?
75%
What does a reduction in the FEV1/FVC ratio indicate?
Airway obstruction
What indicates a diagnosis of asthma over COPD in cases of airway obstruction?
An absolute increase in FEV1 >200 ml that is >15% of baseline
What is the FEV1 /FVC ratio in healthy young and middle-aged adults?
75%
What does a reduction in the FEV1 /FVC ratio indicate?
Airway obstruction
What is the criteria for favoring a diagnosis of asthma over COPD in patients with airway obstruction?
Reversal of obstruction with inhaled β2-agonist or oral steroid over 5 days or more
What is spirometry and how is it performed?
Spirometry is a test that measures dynamic lung volumes by inhaling to total lung capacity and then exhaling into a spirometer with maximal effort to residual volume.
What is the significance of the FEV1/FVC ratio in healthy adults and the elderly?
In healthy young and middle-aged adults, the FEV1/FVC ratio is usually >75%. In the elderly, the ratio is usually 70-75%.
What does a reduction in the FEV1/FVC ratio indicate and how is the severity of obstruction represented?
A reduction in the FEV1/FVC ratio indicates airway obstruction. The severity of obstruction is represented by the absolute FEV1 expressed as a percentage of predicted.
Test your knowledge of spirometry and dynamic lung volumes with this informative quiz. Learn about the FEV1 and FVC measurements, how they are influenced by factors such as age, gender, height and race, and what normal predictive values are. Challenge yourself to understand the FEV1/FVC ratio in healthy young and middle-aged adults. Take this quiz to enhance your understanding of spirometry.
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