Table 2.
Significant values obtained via pulmonary function testing
| PFT Parameter | Value | Percentage Predicted |
|---|---|---|
| FVC, L | 4.85 | 108 |
| FEV1, L | 3.54 | 106 |
| FEV1:FVC ratio | 0.73 | N/A |
| TLC, L | 7.05 | 103 |
| DlCO, ml/min/mm Hg | 13.16 | 57 |
| DlCO/VA, ml/min/mm Hg | 2.07 | 61 |
Definition of abbreviations: DlCO = diffusing capacity of the lung for carbon monoxide; FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity; N/A = not applicable; PFT = pulmonary function testing; TLC = total lung capacity; VA = alveolar volume.
FVC, FEV1, FEV1:FVC ratio, and TLC were all within normal limits. However, DlCO and DlCO/VA were reduced. This isolated reduction in DlCO suggested the presence of pulmonary vascular disease.