This data suggests a localized blockage of lung perfusion.

Pulmonary dead space (again, this is a specialized test and don't worry about its technical details now) is increased, both in absolute terms and as a percentage of total lung volume. This data indicates that there is an area in the lungs that is being ventilated, but which may have a perfusion block.

                             % of normal value
FEV1                               72%
Vital Capacity                     72%
FEV1/FVC                           1.0
Diffusion capacity
    Single breath                  61%
    Steady-state                  108%
Pulmonary dead space              136%
Dead space/Total lung capacity     43% of TLC (normal <35%)