I agree that these patients often have not had physio as they often have a raised ICP. Once declared brain dead I would in this situation carry out a "routine" chest treatment. Depending upon sputum production etc would then plan my treatments accordingly. I have never had donor hanging around ITU more than 24 hours. Sometimes we are lucky to get one treatment in. If these patients are suitable lung donors they usually have no pre- existing lung pathology (I think this includes asthma) and I think they have to have been non- smokers.