Ventilation (physiology)

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List of terms related to Ventilation (physiology)

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


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 Equation Description
Minute ventilation = tidal volume * respiratory rate[1][2] the total volume of gas entering the lungs per minute.
Alveolar ventilation = (tidal volume - dead space) * respiratory rate [1] the volume of gas per unit time that reaches the alveoli, the respiratory portions of the lungs where gas exchange occurs.
Dead space ventilation = dead space * respiratory rate[3] is the volume of gas per unit time that does not reach these respiratory portions, but instead remains in the airways (trachea, bronchi, etc.).

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