Spirometry

Question 1

What is the difference between obstructive and restrictive lung disease?

Answer 1

1. Obstructive - increase in resistance to airflow due to partial or complete airway obstruction at any level.
2. Restrictive - reduced expansion of the lung parenchyma and decrease total lung capacity.

Question 2

What are the normal results for FEV1, FVC, and FEV1/FVC ratio in spirometry?

Answer 2

1. FEV1 - >80% predicted
2. FVC - >80% predicted
3. FEV1/FVC - 75-80%

Question 3

What would the results be for FEV1, FVC, and FEV1/FVC ratio in spirometry in a restrictive lung condition?

Answer 3

1. FEV1 - <80% predicted
2. FVC - <80% predicted
3. FEV1/FVC - >70% predicted

Question 4

What would the results be for FEV1, FVC, and FEV1/FVC ratio in spirometry in an obstructive lung condition?

Answer 4

1. FEV1 - <80% predicted
2. FVC - normal/low
3. FEV1/FVC - <70% predicted