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Flashcards in overview of pulmonary function tets Deck (8)
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1

FVC in asthma

normal

2

FVC in COPD

reduced

3

obstructive lung function pattern factors

PEFR - reduced
FEV1 - reduced
FVC - asthma = normal, COPD = reduced
FEV1/FVC ratio <75%
Gas transfer (TLCO) - reduced in emphysema, normal in asthma
FEV1 response to agonist >15% asthma and <15% COPD

4

restrictive lung function pattern factors

PEFR - normal
FEV1 - reduced
FVC - reduced
FEV1/FVC ratio > 75%
gas transfer (TLCO) - reduced
FEV1 response to agonist - no response

5

when does TLC increase?

in hyperinflation

6

when does TLC decrease

in restircive lung diesease

7

what is TLCO (or DLCO)?

total lung transfer for CO (or diffusing capacity) : corrected for alveolar volume (KCO)

8

when does TLCO decrease?

in anaemia, emphysema, int lung disease, pulmonary oedema, po emboli, bronchiectesis