Congestive Heart Failure - Veterans Affairs

In order for a cough to be effective, an adequate expiratory flow must be generated. A normal peak expiratory flow is in the range of 6-12L/sec1 with peak cough flows reaching up to 20L/sec. Cough strength can be reduced in patients with inspiratory and expiratory muscle weakness, leading to low lung volumes and difficulty clearing secretions2. ................
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