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Figure 3 Acute Effects of Inhaled Iloprost Were Assessed by Pulmonary Function Tests in 13 Patients
At baseline, mean mid-volume forced expiratory flow (FEF25%–75%) was 82% of predicted (range 32% to 119%). After iloprost inhalation, mean FEF25%–75% decreased to 72% of predicted (p = 0.03). In 5 of 14 (38%) patients, FEF25%–75% decreased by more than 15% (range –53% to –17%).