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Dynamic Hyperinflation and its Impact on Patients

What is Dynamic Hyperinflation?
How does this condition lead to progressive ventilatory limitation during activity in patients with COPD?
What are causes of DH?
What would be the impact of DH and possible interventions to reduce DH both immediately and with more significant adaptation to exercise training?

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COPD is defined as a "disease state characterized by airflow limitation that is not fully reversible. The airflow limitation is usually both progressive and associated with an abnormal inflammatory response of the lungs to noxious particles and gases Comprehension of this definition and classification is important for a better understanding of the natural history of the disease and may help guide treatment.

An effective COPD management plan includes 4 components: assessing and monitoring disease, reducing risk factors, managing stable COPD, and managing exacerbations. Once the diagnosis of COPD has been made, the management goals are preventing disease progression, relieving symptoms, improving exercise tolerance, improving health status, preventing and treating complications, and preventing and treating exacerbations (Table 2). (5,6)

Dynamic Hyperinflation:

The hallmark of COPD is airflow obstruction, which leads to incomplete expiration. During exertion, patients with emphysema may experience a ...