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. 2016 May 5;6:25492. doi: 10.1038/srep25492

Figure 1. Long-term effect of Bufei Yishen formula (BYF) on the pulmonary function of chronic obstructive pulmonary disease (COPD) rats.

Figure 1

The COPD rats were intragastricly treated with 4.44 g/kg of BYF once daily from week 9 to 20. Control was treated with normal saline, and positive control was treated with aminophylline (APL, 2.3 mg/kg) once daily. Tidal volume (TV) (A), peak expiratory flow (PEF) (B), and 50% tidal volume expiratory flow (EF50) (C) were analyzed every fourth week from week 0 to 32. Values represent the means ± SEM. *p < 0.05 vs. model.