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Figure 2 | Cough

Figure 2

From: Bronchodilator effect of deep inspiration and bronchoconstriction-triggered cough

Figure 2

Examples of partial and full expiratory flow-volume curves before (a) and after (b) inhalation of methacholine in a young woman. Partial curves were performed from end-tidal inspiration; upon reaching residual volume level, subjects inspired to total lung capacity level and performed the full curve. In this example MEF40 was greater than PEF40 before methacholine inhalation, and the difference became much more after inhalation of 0.5 mg/ml of methacholine, indicating stronger bronchodilator effect of deep inspiration (DI) on methacholine-induced bronchoconstriction.

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