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Ventilation
(physiology)&o=10616
Ventilation (physiology)&o=10616

Ventilation (physiology)

In respiratory physiology, ventilation (or ventilation rate) is the rate at which gas enters or leaves the lung. It is categorised under the following definitions:

Measurement Symbol Equation Description
Minute ventilation dot{V} = tidal volume * respiratory rate the total volume of gas entering the lungs per minute.
Alveolar ventilation dot{V}_A = (tidal volume - dead space) * respiratory rate the volume of gas per unit time that reaches the alveoli, the respiratory portions of the lungs where gas exchange occurs.
Dead space ventilation dot{V}_D = dead space * respiratory rate

 is the volume of gas per unit time that does not reach these respiratory portions, but instead remains in the airways (trachea, bronchi, etc.).

See also

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Last updated on Saturday September 20, 2008 at 12:18:54 PDT (GMT -0700)
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