Spirometry and Dynamic Lung Volumes Quiz

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Questions and Answers

What is the FEV1/FVC ratio in healthy young and middle-aged adults?

>75% (correct)
70-75%
<70%
<60%

What does a reduction in the FEV1/FVC ratio indicate?

COPD
Asthma
Lung restriction
Airway obstruction (correct)

What indicates a diagnosis of asthma over COPD in cases of airway obstruction?

An absolute increase in FVC >200 ml
A decrease in FVC
A decrease in FEV1/FVC ratio
An absolute increase in FEV1 >200 ml that is >15% of baseline (correct)

What is the FEV1 /FVC ratio in healthy young and middle-aged adults?

<blockquote> 75% (D) </blockquote> Signup and view all the answers

What does a reduction in the FEV1 /FVC ratio indicate?

Airway obstruction (D) Signup and view all the answers

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 (A) Signup and view all the answers

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. Signup and view all the answers

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%. Signup and view all the answers

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. Signup and view all the answers

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