pulmonary resistance ( rl ) breathing air and a helium-oxygen mixture ( he-o2 ) dynamic compliance ( cdyn ) , respiratory frequency ( f ) , subdivisions of lung volume , and static deflation pressure-volume ( pv ) curves were measured before and after bronchial challenge with ascaris suum antigen in six rhesus monkeys with varying skin reactivity to this antigen .
C1875235
helium-oxygen
C0030054
o2