In the presence of pleural effusion

In the presence of pleural effusion, spirometry
showed reduction of FVC and FEV 1 . After thoracentesis,
there was an increase ( P , .001) of 350 mL
(18.5%) in FVC and of 280 mL (18.4%) in FEV 1
( Table 1 ). However, no correlation was observed
between the spirometric results and the volume of
fl uid drained.