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Hyperinflation of the Lungs

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Updated February 21, 2012

Written or reviewed by a board-certified physician. See About.com's Medical Review Board.

Definition: Hyperinflation of the lungs occurs when a patient starts to inhale before the last breath was fully exhaled. This results in excess air getting trapped in the lungs with each subsequent breath. Most people with COPD have some degree of hyperinflation of the lungs, regardless of the severity of their condition.

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