Pulmonary Function Tests Flashcards
What type of pulmonary function tests are spirometry, peak flow etc?
Effort dependent
What type of curve is spirometry plotted on?
Volume time curve
From spirometry, what major difference can be seen between COPD and asthma/normal?
Has a much lower FVC
Does asthma have a lower than normal FVC?
No
Does asthma have a lower than normal FEV1?
Yes
Does COPD have a lower than normal FEV1?
Yes
In a question, FVC is reduced, what will it be? What is the only exception to this?
COPD. Exception is airway remodelling in asthma
What will the peak flow be in obstructive?
Decreased
What will the peak flow be in restrictive?
Normal
What will the FEV1 be in obstructive?
Low
What will the FEV1 be in restrictive?
Low
What will the FVC be in obstructive?
Low in COPD, normal in asthma
What will the FVC be in restrictive?
Low
What will the FEV1/FVC ratio be in obstructive?
Decreased (<75%)
What will the FEV1/FVC ratio be in restrictive?
Normal (>75%)
What will the FEV1 response to beta agonist be in obstructive?
> 15% in asthma
< 15% in COPD
What will the FEV1 response to beta agonist be in restrictive?
No response
What will cause a decreased peak flow and FEV1 following exercise?
Asthma
What will cause a decreased SaO2 during exercise?
Restrictive disease
What is a useful test for people who can’t perform a forced expiratory test?
Airway resistance
What does exhaled breath condensate measure?
Exhaled breath nitric oxide
What is exhaled breath nitric oxide a marker of?
Eosinophilic airway inflammation
Why is exhaled breath condensate not used for COPD?
Nitric oxide is suppressed by smoking
