Table 1.

Selected Pulmonary Function Test Results

	Observed	Predicted	Predicted (%)
Selected spirometry results
Forced vital capacity (FVC)	2.32 L	2.59 L	90
Forced expiratory volume in 1 s (FEV1)	1.27 L	1.97 L	65
FEV1/FVC (%)	55	76	72
Selected lung volume results
Inspiratory capacity	1.49 L	2.04 L	73
Total lung capacity	4.22 L	4.75 L	89
Residual volume	1.97 L	2.13 L	92
DLCO corrected for hemoglobin	6.02	19.48	31
DLCO uncorrected for hemoglobin	6.36	19.48	33

These results were interpreted as showing moderate obstructive pulmonary disease and a marked defect in diffusing capacity. There was no improvement with inhaled bronchodilators (data not shown).

DLCO Diffusing capacity of the lung for carbon monoxide