case discusion

[siddig]

22 y man with cystic fibrosis , currently hospitalized 3 times yearly for infection exacerbation. he is colonized with pseudomonas aeroginosa and staph aureus but never had Burkholderia capacia complex . he remains active and in college studying architecture. he requires 2 L oxygen with exertion ..the most recent PFT was FEV1 28%of predicted, FEV1/FVC OF 44%.ABG on room air pH 7.38, PaCO2 46 mHg, PaO2 62 mmHg which of the following is indication of lung transfer to him
a. colonization with pseudomonas aeruginosa
B. FEV1<30%predicted
c. FEV1/FVC <50%
d. PaCO2>40mmHg
e. use of oxygen on exertion

from MRCP4ALL

[einas]

FEV1 less than 30