overview of pulmonary function tets Flashcards
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
