Respiratory 3 - Lung Function Tests

Question 1

define FEV1, FVC

Answer 1

FEV1 - volume exhaled at top speed in one second

FVC - total amount exhaled after deepest breath in

Question 2

define obstructive vs restrictive spirometry patterns

Answer 2

obstructive FEV1/FVC less than 75% (as exhaling for FEV is obstructed but total volume remains good)

restrictive normal or raised (as proportional drop in lung volume and exhaled FEV)

Question 3

reversibility testing findings lung function

Answer 3

asthma it reverses
COPD it doesn’t

both obstructive

Question 4

5 causes of restrictive lung disease

Answer 4

interstitial - fibrosis 
sarcoid
obesity
motor neurone
scoliosis

Question 5

summarise peak flow testing

Answer 5

best of 3
compare to predicted value

produces % PEFR