in both groups local ventilation was diminished and more variable than in healthy lungs -- that is , in the mid 70 % of lung volume the local residual volume to total gas volume ratios ( rv/tgv ) were 32 % ( 10 % ) in the fibrotic group and 66 % ( 14 % ) in the group with chronic airflow limitation , compared with 23 % ( 5 % ) in healthy subjects .
C0024109
lungs
C0024117
chronic