What are the two classic clinical descriptions of COPD patients and the radiographic features of each?

Pink puffer (oxygen saturation maintained with no carbon dioxide retention): marked emphysema, small heart, mild pulmonary arterial hypertensive changes

Blue bloater (oxygen saturation not maintained, and the patient has marked carbon dioxide retention): enlarged heart, absence of obviously hyperexpanded lungs, pul-monary plethora (pulmonary hypertension and effects of polycythemia)