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residual volume

   Also found in: Dictionary/thesaurus, Medical, Legal, Financial, Acronyms, Wikipedia, Hutchinson 0.02 sec.
residual volume [rə′zij·ə·wəl ′väl·yəm]
(physiology)
Air remaining in the lungs after the most complete expiration possible; it is elevated in diffuse obstructive emphysema and during an attack of asthma. Also known as residual air.


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Thus, it has been shown that limited chest expansion causes decreases in residual volume, VC, maximal respiratory flow rate, total pulmonary capacity, stroke volume, and cardiac output.
These declines occur linearly with age, starting between ages 20 to 30, while residual volume (the amount that cannot be exhaled) increases and the total lung capacity remains unchanged.
 
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