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

FVC in asthma

A

normal

2
Q

FVC in COPD

A

reduced

3
Q

obstructive lung function pattern factors

A

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
Q

restrictive lung function pattern factors

A
PEFR - normal
FEV1 - reduced
FVC - reduced
FEV1/FVC ratio > 75%
gas transfer (TLCO) - reduced
FEV1 response to agonist - no response
5
Q

when does TLC increase?

A

in hyperinflation

6
Q

when does TLC decrease

A

in restircive lung diesease

7
Q

what is TLCO (or DLCO)?

A

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

8
Q

when does TLCO decrease?

A

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